CN212513943U

CN212513943U - A friction head for scraping tester

Info

Publication number: CN212513943U
Application number: CN202020776488.8U
Authority: CN
Inventors: 赵炆; 徐晓晨
Original assignee: Shanghai Dazhong Xiangyuan Power Supply Co Ltd
Current assignee: Shanghai Dazhong Xiangyuan Power Supply Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-02-09
Anticipated expiration: 2030-05-12

Abstract

The utility model relates to a friction head for scraping tester, this friction head include the post, set up positioning mechanism and the detachably setting of bottom the post at the positioning mechanism abrasive paper in the positioning mechanism bottom, and positioning mechanism's bottom surface is downward convex cambered surface, abrasive paper and positioning mechanism's bottom surface looks adaptation. Compared with the prior art, the utility model has the advantages that the abrasive paper is easy to replace, the test precision and the test flexibility are improved, and the replacement operation is simple and quick; the bottom of the cambered surface of the abrasive paper is in line contact with the material to be tested, so that a reciprocating straight path is directly adopted, the complexity of path design is greatly simplified, and the test repeatability is better, so that the test precision is ensured; the accuracy requirement on instrument debugging is reduced, the difficulty of operation is reduced, and the testing efficiency is improved.

Description

A friction head for scraping tester

Technical Field

The utility model belongs to the technical field of the scraping tester, a friction head for scraping tester is related to.

Background

The scraping tester is a device for testing the scraping resistance of materials, is widely applied to the automobile industry, and is mainly used for detecting the wear resistance of smooth and grain plastic ornaments in automobile interior and exterior ornaments.

The existing scraping tester mainly comprises a sample loading table, a friction head bracket and a power device. When the material scraping and wiping device is used, a material to be tested is placed on the sample carrying table and is fixed, then the friction head is placed on the friction head support, a weight with required weight is placed on the friction head or the friction head support, then the sample carrying table drives the material to be tested to horizontally reciprocate along a pre-designed route under the driving of the power device, and the scraping and wiping resistance of the material is judged through continuous friction of the bottom of the friction head on the material and the state of the material after friction.

The friction head used at present mainly comprises a vertical pole and a cylindrical nylon block arranged at the bottom end of the pole. During the use, fix the post on the friction head support to establish the weight on the post, later with the bottom of nylon block and the material surface contact that awaits measuring, produce the rubbing action through the relative motion between the bottom of nylon block and the material that awaits measuring. However, this type of friction head presents a number of problems, such as:

1. the nylon block is inconvenient to replace, and the bottom of the nylon block is unevenly worn along with the increase of the service time, so that the accuracy of a test result is influenced;

2. the nylon block is cylindrical, and the contact surface between the bottom of the nylon block and the material to be tested is a circular surface, so that when the motion path of the material is designed, a complex Lissajous figure needs to be designed, the complexity of the test process is increased, meanwhile, the test repeatability is poor, and the test precision is influenced;

3. if the pole column is not kept in a vertical state and is inclined to a certain degree, the bottom of the cylindrical nylon block cannot be completely contacted with a material to be tested, and the test cannot be normally carried out.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a friction head for scraping the tester in order to overcome the defect that above-mentioned prior art exists, improved the measuring accuracy.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a friction head for scraping tester, this friction head includes the post, sets up positioning mechanism and the detachably that sets up in the positioning mechanism bottom in the post bottom sand paper, positioning mechanism's bottom surface be the convex cambered surface downwards, sand paper and positioning mechanism's bottom surface looks adaptation. Abrasive paper detachably installs on positioning mechanism's arc bottom surface, not only is convenient for change abrasive paper, simultaneously because the arc bottom surface is a water flat line for the lowest, therefore changed traditional cylindric nylon piece and the circular contact surface that awaits measuring between the material into line contact, so need not adopt complicated lissajous figure route again.

Furthermore, the included angle between the pole and the vertical direction is 0-5 degrees. Because the bottom surface of the positioning mechanism is a downward convex cambered surface, even if the rod column inclines at a certain angle, a horizontal contact line still exists between the cambered surface at the bottom of the positioning mechanism and the material to be tested.

Further, positioning mechanism including the cover establish the holding ring in the post bottom, fixed setting at the protruding physique and the abrasive paper clamping components of holding ring bottom, the bottom surface of protruding physique be the convex cambered surface down, abrasive paper set up in the bottom of protruding physique to with the bottom surface looks adaptation of protruding physique. Abrasive paper clamping components is used for the fixed abrasive paper of centre gripping, realizes abrasive paper's demountable installation.

Furthermore, the bottom of the rod column is in threaded connection with the positioning ring. The bottom of the rod column is screwed into the positioning ring through threads, so that the rod column is fixedly connected with the positioning ring.

Furthermore, the top of the convex body is provided with a positioning ring mounting groove matched with the positioning ring, and the positioning ring is fixedly arranged in the positioning ring mounting groove.

Furthermore, the bottom surface of the positioning ring installation groove is a plane. The bottom of the pole column penetrates through the positioning ring and tightly abuts against the bottom surface of the positioning ring mounting groove, and the connection stability is guaranteed.

Furthermore, the top surface of the convex body is a plane, the bottom surface is an arc surface, the abrasive paper is in a strip shape, and the abrasive paper is tightly attached to the bottom surface of the convex body after being bent into the arc surface. The abrasive paper can be common strip-shaped abrasive paper. When the abrasive paper clamp is used, abrasive paper with required length is cut, then the abrasive paper is bent into an arc surface and then is tightly attached to the bottom surface of the convex body, and the abrasive paper is fixed on the bottom surface of the convex body through the abrasive paper clamping assembly.

Further, the cylindric lock mounting groove has all been seted up at the both ends of convex body, abrasive paper clamping component include a pair of cylindric lock that sets up respectively in two cylindric lock mounting grooves, the both ends of abrasive paper stretch into respectively in two cylindric lock mounting grooves to be located between cylindric lock and the convex body. Hug closely sand paper on the bottom surface of convex body after, in the cylindric lock mounting groove was put into at the both ends of sand paper, later put into the cylindric lock and push down sand paper in two cylindric lock mounting grooves, fix the both ends of sand paper, realize sand paper's demountable installation.

Furthermore, the sand paper clamping assembly further comprises a pair of elastic tightening strips which are respectively arranged on two sides of the convex body, and the elastic tightening strips are sleeved on the two cylindrical pins at the same time. Elasticity tightening strip has elasticity, after putting into the cylindric lock in two cylindric lock mounting grooves, overlaps the one end at two cylindric locks with one of them elasticity tightening strip simultaneously to overlap another elasticity tightening strip at the other end of two cylindric locks simultaneously, and then fix two cylindric locks through two elasticity tightening strips, make two cylindric locks keep in the cylindric lock mounting groove.

Furthermore, the both ends of cylindric lock all seted up elasticity tightening strip mounting groove, the both ends of elasticity tightening strip all seted up with the through-hole of elasticity tightening strip mounting groove looks adaptation. The inner diameter of the through hole is slightly smaller than the outer diameter of the cylindrical pin. The through hole of the elastic tightening strip is sleeved in the elastic tightening strip mounting groove of the cylindrical pin, so that stable connection of the two cylindrical pins and the two elastic tightening strips is guaranteed.

When the utility model is in actual application, the abrasive paper with proper mesh is selected according to the roughness requirement of the friction head in the test standard, the abrasive paper is cut to the required size and then is tightly attached to the bottom surface of the convex body, and the two cylindrical pins and the two elastic tightening strips are utilized to fix the abrasive paper; then, the friction head is integrally arranged on the scraping tester, weights with proper weight are sleeved on the post according to requirements, and then the scraping tester is started to test; in the test process, a sample carrying table of the scraping tester drives a material to be tested to do linear reciprocating motion, so that the bottom of the abrasive paper and the surface of the material to be tested rub against each other, scratches are left on the surface of the sample, and the scratch resistance of the sample is judged according to the depths of the scratches. The test specimens may be plastic plates, test plates coated with paint and varnish, and the like.

Compared with the prior art, the utility model has the characteristics of it is following:

1) the abrasive paper is detachably arranged at the bottom of the convex body by utilizing the matching of the two cylindrical pins, the two elastic tightening strips and the two ends of the convex body, so that the abrasive paper with different roughness can be conveniently replaced according to different testing requirements, the load is improved, or new abrasive paper is replaced after the abrasive paper is worn, the testing precision and the testing flexibility are improved, and the replacement operation is simple and quick;

2) the circular contact surface between the traditional cylindrical nylon block and the material to be tested is changed into the line contact between the bottom of the cambered surface of the abrasive paper and the material to be tested, and the contact mode is changed, so that a reciprocating linear path can be directly adopted without using a complex Lissajous figure path during path planning, the complexity of path design is greatly simplified, and the test repeatability is better, so that the test precision is ensured;

3) because the sand paper is bent into the cambered surface with the shape consistent with the shape of the bottom surface of the convex body, even if the rod column is inclined at a certain angle, a horizontal contact line still exists between the cambered surface and the material to be tested, so that the state of line contact can be always kept, the requirement on the precision of instrument debugging is greatly reduced, the difficulty of operation is reduced, and the testing efficiency is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the convex body of the present invention;

FIG. 3 is a schematic structural view of the cylindrical pin of the present invention;

FIG. 4 is a schematic structural view of the elastic tightening strip of the present invention;

the notation in the figure is:

1-pole, 2-abrasive paper, 3-holding ring, 4-convex body, 5-holding ring mounting grooves, 6-cylindric lock mounting grooves, 7-cylindric lock, 8-elastic tightening strip, 9-elastic tightening strip mounting grooves, 10-through-hole.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example (b):

the friction head for the scraping tester shown in fig. 1 comprises a post 1, a positioning mechanism arranged at the bottom of the post 1 and abrasive paper 2 detachably arranged at the bottom of the positioning mechanism, wherein the bottom surface of the positioning mechanism is a downward convex arc surface, and the abrasive paper 2 is matched with the bottom surface of the positioning mechanism.

Wherein, the included angle between the pole column 1 and the vertical direction is 0-5 degrees.

Positioning mechanism is including the cover establish the holding ring 3 in 1 bottom of post, fixed setting at the protruding physique 4 and the abrasive paper clamping components of 3 bottoms of holding ring, and the bottom surface of protruding physique 4 is the convex cambered surface downwards, and abrasive paper 2 sets up in the bottom of protruding physique 4 to with the bottom surface looks adaptation of protruding physique 4. The bottom of the post 1 is connected with the positioning ring 3 by screw thread.

As shown in fig. 2, the top of the convex body 4 is provided with a positioning ring mounting groove 5 adapted to the positioning ring 3, and the positioning ring 3 is fixedly disposed in the positioning ring mounting groove 5. The bottom surface of the positioning ring mounting groove 5 is a plane. The top surface of the convex body 4 is a plane, the bottom surface is an arc surface, the sand paper 2 is in a strip shape, and the sand paper 2 is tightly attached to the bottom surface of the convex body 4 after being bent into the arc surface. Cylindric lock mounting groove 6 has all been seted up at the both ends of convex body 4, and abrasive paper clamping component includes a pair of cylindric lock 7 that sets up respectively in two cylindric lock mounting grooves 6, and in two cylindric lock mounting grooves 6 were stretched into respectively at the both ends of abrasive paper 2 to be located between cylindric lock 7 and the convex body 4. The sand paper clamping component also comprises a pair of elastic tightening strips 8 which are respectively arranged at two sides of the convex body 4, and the elastic tightening strips 8 are simultaneously sleeved on the two cylindrical pins 7.

As shown in fig. 3, both ends of the cylindrical pin 7 are provided with elastic tightening strip mounting grooves 9. As shown in fig. 4, through holes 10 matched with the elastic tightening strip mounting grooves 9 are formed at both ends of the elastic tightening strip 8.

In practical application, according to the requirement on the roughness of a friction head in a test standard, selecting the sand paper 2 with a proper mesh number, cutting the sand paper 2 to a required size, then tightly attaching the cut sand paper to the bottom surface of the convex body 4, and fixing the sand paper 2 by using two cylindrical pins 7 and two elastic tightening strips 8; then, the friction head is integrally arranged on the scraping tester, a weight with proper weight is sleeved on the post 1 according to the requirement, and then the scraping tester is started for testing; in the test process, a sample carrying table of the scraping tester drives a material to be tested to do linear reciprocating motion, so that the bottom of the abrasive paper 2 and the surface of the material to be tested rub against each other, scratches are left on the surface of the sample, and the scratch resistance of the sample is judged according to the depths of the scratches.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a friction head for scraping tester, characterized in that, this friction head includes post (1), sets up positioning mechanism and the detachably setting sand paper (2) in the positioning mechanism bottom in post (1) bottom, positioning mechanism's bottom surface be the convex cambered surface downwards, sand paper (2) and positioning mechanism's bottom surface looks adaptation.

2. A friction head for a scratch tester according to claim 1, characterized in that the angle of the post (1) to the vertical is 0-5 °.

3. The friction head for a scratch tester according to claim 1, wherein the positioning mechanism comprises a positioning ring (3) sleeved on the bottom of the rod column (1), a convex body (4) fixedly arranged at the bottom of the positioning ring (3), and a sandpaper clamping assembly, the bottom surface of the convex body (4) is a downward convex arc surface, and the sandpaper (2) is arranged at the bottom of the convex body (4) and is matched with the bottom surface of the convex body (4).

4. A friction head for a scratch tester according to claim 3, characterized in that the threaded connection between the bottom of the stem (1) and the retaining ring (3).

5. The friction head for the scratch tester according to claim 3, wherein the top of the convex body (4) is provided with a positioning ring installation groove (5) matched with the positioning ring (3), and the positioning ring (3) is fixedly arranged in the positioning ring installation groove (5).

6. A friction head for a scratch tester according to claim 5, characterized in that the bottom surface of the retaining ring mounting groove (5) is planar.

7. A friction head for a scratch tester according to claim 3, characterized in that the top surface of the convex body (4) is flat and the bottom surface is curved, the sandpaper (2) is elongated, and the sandpaper (2) is curved to be curved to fit closely to the bottom surface of the convex body (4).

8. The friction head for a scratch tester according to claim 7, wherein both ends of the convex body (4) are provided with cylindrical pin installation grooves (6), the sandpaper clamping assembly comprises a pair of cylindrical pins (7) respectively arranged in the two cylindrical pin installation grooves (6), and both ends of the sandpaper (2) respectively extend into the two cylindrical pin installation grooves (6) and are located between the cylindrical pins (7) and the convex body (4).

9. A friction head for a scratch tester according to claim 8, wherein said sandpaper clamping assembly further comprises a pair of elastic tightening strips (8) disposed on either side of the convex body (4), said elastic tightening strips (8) being fitted over the two cylindrical pins (7) simultaneously.

10. The friction head for a scratch tester according to claim 9, wherein both ends of the cylindrical pin (7) are provided with elastic tightening strip mounting grooves (9), and both ends of the elastic tightening strip (8) are provided with through holes (10) adapted to the elastic tightening strip mounting grooves (9).