CN110160865B - Temperature control cooling pin clamp for pin disc type friction wear testing machine - Google Patents
Temperature control cooling pin clamp for pin disc type friction wear testing machine Download PDFInfo
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- CN110160865B CN110160865B CN201910517423.3A CN201910517423A CN110160865B CN 110160865 B CN110160865 B CN 110160865B CN 201910517423 A CN201910517423 A CN 201910517423A CN 110160865 B CN110160865 B CN 110160865B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
The invention provides a temperature control cooling pin clamp for a pin disc type friction wear testing machine, which comprises: a temperature controller fixed on the upper end of the pin mandril; the pin ejector rod is provided with a double-step structure; a cooling liquid sleeve which is fixed at one end of the pin ejector rod and is provided with a U-shaped structure with two inner and outer pipe walls is sleeved; a partition plate for longitudinally dividing the U-shaped space into a liquid inlet area and a liquid outlet area is arranged between the inner pipe wall and the outer pipe wall of the cooling liquid sleeve, and the liquid inlet area is communicated with the liquid outlet area at the bottom of the pin; the temperature controller is connected with a temperature sensor arranged above the pin through a lead in the pin ejector rod, and during work, the temperature of the end part of the pin is monitored in real time through the temperature sensor, so that the flow rate of cooling liquid in the cooling liquid sleeve is controlled in a feedback mode through the temperature controller. The invention has simple structure, low cost and small volume, is suitable for being installed on most of the prior friction and wear testing machines, and has strong applicability.
Description
Technical Field
The invention relates to the technical field of die abrasion, in particular to a temperature control cooling pin clamp for a pin disc type friction abrasion testing machine, which is mainly applied to detecting material loss caused by abrasion among an upper stamping die, a lower stamping die and a plate material and abrasion depth change of the plate material and the die in the stamping forming process of the plate material of an automobile body.
Background
At present, high-strength steel is widely used in stamping manufacture due to good performance in workpiece manufacture, although plate stamping forming is used as an important metal forming process and is mature to be applied to modern industrial manufacture, vehicle body plates of vehicles need to be stamped and formed, particularly hot stamping forming, friction and abrasion of plate dies are involved, the dies are repeatedly abraded by the plates in the stamping process, the boss height and the groove depth of the dies are gradually reduced in the long term, correct forming of the plates is seriously affected after the degree is deepened, and the vehicle body quality is affected.
Chinese utility model patent (application number 201620157805.1) "has cooling device's round pin dish formula friction wear testing machine", this patent discloses a friction wear testing machine, wherein is provided with cooling device under on the main shaft, and mainly used solves among the prior art structure complicacy, and the noise is big, and the radiating effect is poor scheduling problem, does not mention in the aspect of the temperature control of experimental round pin.
For a friction wear testing machine (such as HT-1000), the temperature in a furnace is easy to control in the process of simulating hot stamping friction, but the temperature of a working surface of a pin changes along with the friction and is very important for controlling the temperature of the pin. The tensile wear will also be different at different temperature settings, and it is essential to determine a necessary temperature setting for the test, and the temperature control process solves this series of problems.
Disclosure of Invention
According to the technical problem that the temperature of the cooling pin of the conventional friction wear testing machine cannot be adjusted, so that the friction wear cannot be influenced by accurately controlling the temperature, the temperature-controlled cooling pin clamp for the pin disc type friction wear testing machine is provided. The invention mainly fixes the cooling liquid sleeve with double inner and outer pipe walls on the pin ejector rod, monitors the temperature of the end part of the pin in real time through the temperature sensor, and further controls the flow rate of the cooling liquid in the cooling liquid sleeve in a feedback way through the temperature controller, thereby realizing adjustable temperature control and greatly improving the simulation degree.
The technical means adopted by the invention are as follows:
the utility model provides a control by temperature change cooling pin anchor clamps for selling dish friction wear testing machine which characterized in that includes:
the temperature controller is fixed at the upper end of the pin ejector rod and is positioned below the weight, the top end of the pin ejector rod is connected to a machine cover of the testing machine through threads, and the pin ejector rod is of a double-step structure;
the cooling liquid sleeve is provided with a U-shaped structure with two inner and outer pipe walls, the end, fixed with the pin, of the pin ejector rod is sleeved and fixed, the cooling liquid sleeve contains a first step part and a second step part of the pin ejector rod, the pin is fixed at the end part of the first step part, and the cooling liquid sleeve is fixedly connected to the inner side wall of the testing machine through the outer pipe wall of the cooling liquid sleeve;
a partition plate for longitudinally dividing the U-shaped space into a liquid inlet area and a liquid outlet area is arranged between the inner pipe wall and the outer pipe wall of the cooling liquid sleeve, the liquid inlet area and the liquid outlet area are communicated at the bottom of the pin, and the liquid inlet area and the liquid outlet area are respectively communicated with a cooling liquid inlet and a cooling liquid outlet above the cooling liquid sleeve;
the temperature controller is connected with a temperature sensor arranged above the pin through a lead in the pin ejector rod, and during work, the temperature sensor monitors the temperature of the end part of the pin in real time, and then the temperature controller controls the flow rate of cooling liquid in the cooling liquid sleeve in a feedback mode. The temperature of the pin is controlled by controlling the flow rate of water flow through the temperature controller, and the pin disc friction wear test is performed by using the pins in different temperature environments.
Furthermore, the inner pipe of the cooling liquid sleeve is provided with a stepped structure matched with the first stepped part and the second stepped part of the pin mandril, the stepped structure comprises a second accommodating part used for accommodating the second stepped part of the pin mandril and a first accommodating part used for accommodating the first stepped part of the pin mandril, and the width of a gap between the second inner pipe wall of the second accommodating part and the outer pipe wall of the cooling liquid sleeve is L1The gap width between the first inner pipe wall of the first accommodating part and the outer pipe wall of the cooling liquid sleeve is L2Satisfy L1＜L2。
Furthermore, the lower end of the cooling liquid sleeve is provided with a hemispherical end face, the hemispherical end face avoids vortex generated by cooling liquid caused by a sharp part, and a heat concentration phenomenon easily caused by a sharp area is avoided, so that ablation of the pin clamp caused by high temperature in the furnace is reduced, and the service life of the clamp is prolonged. The end face of the lower end of the cooling liquid sleeve is provided with a hole for the end part of the pin to pass through, and the bottom edge of the first accommodating part is fixedly connected with the outer edge of the hole through a connecting part to form sealing. The sealing is mainly to prevent the coolant from leaking, so that the coolant flows only in the double-layer structure of the coolant jacket.
Further, the connecting portion has a conical structure matching the pin, and a taper angle of the connecting portion is larger than a taper angle of the pin.
Furthermore, after the cooling liquid sleeve is sleeved and fixed, a gap of 1-2mm is formed between the upper end face of the cooling liquid sleeve and a boss at the upper end of the second step part of the pin ejector rod.
Furthermore, the inner pipe wall and the outer pipe wall of the cooling liquid sleeve are both made of steel plates with the thickness of 0.2-0.5 mm.
Furthermore, the partition plate is made of a steel plate with the thickness of 0.2-0.5 mm.
Further, the main body part of the upper part of the second step part of the pin mandril is provided with a form of two opposite plane flat keys and is used for being fixed with an external clamp to prevent the pin mandril from rotating in the clamp.
Compared with the existing pin clamp, the pin clamp has the following advantages:
at present, the temperature control technology of the pin is still lack, the temperature of the pin in an experimental environment cannot be quantitatively set, and the temperature control type pin clamp provided by the invention is designed in detail on the aspect of controlling the temperature. The invention can provide a condition for carrying out a pin disc friction and wear experiment under different temperature environments to research the relationship between the pin disc wear amount and the temperature.
According to the temperature-controlled cooling pin clamp provided by the invention, the load acts on the upper end of the pin through the pin ejector rod, the pin and the pin clamp jointly act to enable the pin to be in contact abrasion with a disc under different pressures, the pin temperature is controlled through the current feedback of the temperature sensor (thermistor) at the tail end of the pin ejector rod, namely, the pin temperature in a test machine dry friction abrasion experiment during simulation thermoforming is controlled, and the important variable of the pin temperature is adjusted, so that the simulation of abrasion conditions at different temperatures is realized, the test defects are improved, meanwhile, the pin clamp is ensured to have smaller ablation loss, and the service life is longer.
The external design of the hemispherical end face provided by the invention is beneficial to realizing the uniformity and stability of heat, reducing the heat concentration to protect the integrity of the cooling water jacket, prolonging the service life and avoiding the outer wall of the clamp from cracking due to uneven temperature.
The invention has good cooling effect, and can set the pin temperature according to conditions; the pin ejector rod and the pin can be controlled in an ideal state by inputting cooling liquid (such as common soft water) with proper flow rate, so that the abrasion loss of the pin under unit relative displacement at specific temperature can be obtained, more diversified experimental data can be obtained, and the pin clamp has few parts, simple structure, low cost, small volume, suitability for being installed on most of the existing friction and abrasion testing machines and strong applicability.
For the above reasons, the present invention can be widely applied to the field of drawing die press forming along with the development of automobile manufacturing and press forming processes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a temperature controlled cooling pin fixture of the present invention.
FIG. 2 is a schematic diagram of a coolant jacket with a double wall in a temperature controlled cooling pin clamp according to the present invention.
Fig. 3 is a sectional view taken along the line a-a in fig. 1.
Fig. 4 is a sectional view taken along line B-B in fig. 1.
Fig. 5 is a cross-sectional view taken along line C-C in fig. 1.
In the figure: 1. a weight; 2. a temperature controller; 3. a coolant inlet; 4. a coolant outlet; 5. the outer pipe wall of the cooling liquid sleeve; 6. an inner tube; 7. a pin ejector rod; 8. a temperature sensor; 9. a pin; 10. a partition plate; 11. a connecting portion; 12. a first accommodating portion; 13. a second accommodating portion; 14. and (4) a hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 5, the present invention provides a temperature-controlled cooling pin jig for a pin-on-disc type frictional wear tester, comprising:
and the temperature controller 2 is fixed at the upper end of the pin ejector rod 7 and positioned below the weight 1, and the temperature controller 2 can control the flow rate of the cooling liquid in the cooling liquid sleeve.
The top end of the pin mandril 7 is connected to a machine cover of the testing machine through threads, the pin mandril 7 has a double-step structure, namely two step bosses, the whole pin mandril 7 is divided into three parts, namely a first step part, a second step part and a third step part at the uppermost end from bottom to top, namely the section connected with the weight 1 is called the third step part; as shown in fig. 3, the main body portion (i.e., the third step portion) of the upper portion of the second step portion of the pin jack 7 has a two-faced flat key form for fixing with an external jig to prevent the pin jack 7 from rotating in the jig.
As shown in fig. 2, the cooling liquid jacket has a U-shaped structure with two inner and outer pipe walls, is sleeved and fixed at one end of the pin ejector 7 at which the pin 9 is fixed, and accommodates the first step part and the second step part of the pin ejector 7, the pin 9 is fixed at the end of the first step part, and the cooling liquid jacket is fixedly connected to the inner side wall of the testing machine through the outer pipe wall 5 of the cooling liquid jacket; the inner pipe wall and the outer pipe wall of the cooling liquid sleeve are made of steel plates with the thickness of 0.2-0.5mm, and the steel plates with the thickness of 0.3-0.4mm are preferably selected, so that the required bearing capacity is sufficiently provided, and the cooling liquid sleeve has high heat conduction efficiency.
A partition plate 10 (shown in figure 4) which longitudinally divides the U-shaped space into a liquid inlet area and a liquid outlet area is arranged between the inner pipe wall and the outer pipe wall of the cooling liquid sleeve. The partition plate 10 is made of a steel plate having a thickness of 0.2 to 0.5mm, preferably 0.3 to 0.4mm, in order to provide an increased length through which the coolant flows.
The liquid inlet area is communicated with the liquid outlet area at the bottom of the pin 9, the bottom is the end of the first step part, namely the position of the conical area where the pin 9 is located in the figure 1 is communicated (as shown in figure 5, the pin 9 is communicated with the cooling channel at the lower part of the cooling liquid jacket), and the temperature of the cooling liquid on the pipe wall and the pin 9 can be controlled more uniformly. The liquid inlet area and the liquid outlet area are respectively communicated with a cooling liquid inlet 3 and a cooling liquid outlet 4 above the cooling liquid jacket.
The inner pipe 6 of the cooling liquid sleeve is provided with a stepped structure matched with the first stepped part and the second stepped part of the pin ejector rod 7, the stepped structure comprises a second accommodating part 13 used for accommodating the second stepped part of the pin ejector rod 7 and a first accommodating part 12 used for accommodating the first stepped part of the pin ejector rod 7, and the width of a gap between the second inner pipe wall of the second accommodating part 13 and the outer pipe wall 5 of the cooling liquid sleeve is L1(3-5mm), the gap width between the first inner pipe wall of the first container 12 and the outer pipe wall 5 of the coolant jacket is L2(5-7mm) satisfying L1＜L2. The difference in the width of the gap is mainly to achieve a reduction in the flow velocity of the cooling liquid over a wide area, which is easy to control.
The lower extreme of coolant jacket is for having hemispherical terminal surface, the terminal surface of the lower extreme of coolant jacket is equipped with the confession the hole 14 that the round pin 9 tip passed through, the bottom border of first container 12 through connecting portion with the outer edge fixed connection in hole 14 forms sealedly. The connecting portion 11 has a conical configuration matching the pin 9, and the connecting portion 11 has a greater cone angle than the pin 9.
In operation, the bottom edges of the connecting part 11 and the first accommodating part 12 are welded to the outer edge of the hole 14, respectively, and the connecting part 11 is made of a steel sheet matched with the conical part of the pin 9, and the inclination angle is larger than the cone angle of the pin 9, so that the connecting part can be taken out easily after the test is finished.
After the cooling liquid sleeve is sleeved and fixed, a gap of 1-2mm is formed between the upper end face of the cooling liquid sleeve and a boss at the upper end of the second step part of the pin ejector rod 7, and the pin length compensation effect is achieved.
The temperature controller 2 is connected with a temperature sensor 8 (generally, a thermistor is adopted to facilitate operation) arranged above the pin 9 through a lead in the pin ejector rod 7, the temperature sensor 8 monitors the temperature of the end part of the pin 9 in real time during working, and the longitudinal length of the pin is very small, so that the end temperature can be approximately regarded as the working end temperature, and the flow rate of cooling liquid in the cooling liquid sleeve is controlled by the temperature controller 2 in a feedback mode.
The thermistor is arranged at the tail end of the pin ejector rod 7 of the pin clamp (can be welded at the outer side of the tail end of the first step part) and used for measuring the temperature of the pin 9, and the friction and wear test of the pin disc can be carried out under the temperature controllable condition through the matching of the parts, so that the more accurate test condition control is carried out, the simulation of the wear condition at different temperatures is realized, the test defects are improved, the pin clamp is ensured to have smaller ablation loss and longer service life, and the test quality is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a control by temperature change cooling pin anchor clamps for selling dish friction wear testing machine which characterized in that includes:
the temperature controller (2) is fixed at the upper end of the pin ejector rod (7) and is positioned below the weight (1), the top end of the pin ejector rod (7) is connected to a machine cover of the testing machine through threads, and the pin ejector rod (7) has a double-step structure; the dual step structure includes: the two stepped bosses divide the whole pin ejector rod (7) into three parts, namely a first stepped part, a second stepped part and a third stepped part at the uppermost end from bottom to top, and the section connected with the weight (1) is called a third stepped part;
the cooling liquid sleeve is of a U-shaped structure with two inner and outer pipe walls, one end of the pin ejector rod (7) fixed with a pin (9) is sleeved and fixed, the cooling liquid sleeve contains a first step part and a second step part of the pin ejector rod (7), the pin (9) is fixed at the end part of the first step part, and the cooling liquid sleeve is fixedly connected to the inner side wall of the testing machine through the outer pipe wall (5) of the cooling liquid sleeve;
a partition plate (10) for longitudinally dividing the U-shaped space into a liquid inlet area and a liquid outlet area is arranged between the inner pipe wall and the outer pipe wall of the cooling liquid sleeve, the liquid inlet area and the liquid outlet area are communicated at the bottom of the pin (9), and the liquid inlet area and the liquid outlet area are respectively communicated with a cooling liquid inlet (3) and a cooling liquid outlet (4) above the cooling liquid sleeve; the inner pipe (6) of the cooling liquid jacket is provided with a stepped structure matched with the first stepped part and the second stepped part of the pin ejector rod (7), and comprises a second accommodating part (13) for accommodating the second stepped part of the pin ejector rod (7) and a first accommodating part (12) for accommodating the first stepped part of the pin ejector rod (7);
the temperature controller (2) is connected with a temperature sensor (8) arranged above the pin (9) through a lead in the pin ejector rod (7), and when the temperature controller works, the temperature sensor (8) monitors the temperature of the end part of the pin (9) in real time, so that the flow rate of cooling liquid in the cooling liquid jacket is controlled by the temperature controller (2) in a feedback mode;
the lower end of the cooling liquid sleeve is a hemispherical end face, the end face of the lower end of the cooling liquid sleeve is provided with a hole (14) for the end part of the pin (9) to pass through, and the bottom edge of the first accommodating part (12) is fixedly connected with the outer edge of the hole (14) through a connecting part (11) to form sealing; the connecting part has a conical structure matched with the pin (9), and the cone angle of the connecting part is larger than that of the pin (9).
2. The temperature-controlled cooling pin clamp for pin-on-disc friction wear testing machines of claim 1, characterized in that the gap width between the second inner pipe wall of the second receptacle (13) and the outer pipe wall (5) of the coolant jacket is L1Between the first inner pipe wall of the first receptacle (12) and the outer pipe wall (5) of the coolant jacketHas a gap width of L2Satisfy L1＜L2。
3. The temperature-controlled cooling pin clamp for the pin disc type friction wear testing machine according to claim 1, wherein a gap of 1-2mm is formed between the upper end surface of the cooling liquid sleeve and the boss at the upper end of the second step part of the pin ejector rod (7) after the cooling liquid sleeve is sleeved and fixed.
4. The temperature-controlled cooling pin clamp for the pin disc type friction wear testing machine as claimed in claim 1, wherein the inner and outer pipe walls of the cooling fluid jacket are made of steel plates with the thickness of 0.2-0.5 mm.
5. The temperature-controlled cooling pin clamp for pin-and-disc friction wear testers according to claim 1, characterized in that said spacer (10) is made of a steel plate with a thickness of 0.2-0.5 mm.
6. The temperature-controlled cooling pin jig for a pin-and-disc type friction wear tester as claimed in claim 1, wherein the main body portion of the upper portion of the second step portion of the pin lift pin (7) has a two-faced flat key form for fixing with an external jig, preventing the pin lift pin (7) from rotating in the jig.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910517423.3A CN110160865B (en) | 2019-06-14 | 2019-06-14 | Temperature control cooling pin clamp for pin disc type friction wear testing machine |
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| CN201910517423.3A CN110160865B (en) | 2019-06-14 | 2019-06-14 | Temperature control cooling pin clamp for pin disc type friction wear testing machine |
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| CN110160865A CN110160865A (en) | 2019-08-23 |
| CN110160865B true CN110160865B (en) | 2021-11-16 |
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| CN112345394B (en) | 2020-08-26 | 2023-02-17 | 江苏大学 | Friction wear test device capable of realizing differential temperature distribution of pin discs and realizing self-adaptive adjustment |
| CN114235209B (en) * | 2021-12-28 | 2023-06-23 | 苏州英特模科技股份有限公司 | Non-contact type measuring equipment and method for dynamic workpiece |
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