CN216717999U

CN216717999U - Rubber compression permanent deformation measuring device

Info

Publication number: CN216717999U
Application number: CN202123370573.8U
Authority: CN
Inventors: 杨镇远
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-06-10
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a rubber compression permanent deformation measuring device, which relates to the technical field of rubber performance tests and comprises a compression assembly, wherein the compression assembly comprises a bottom plate, a pressing plate, a limiting block, a fastening bolt and a nut, the pressing plate is positioned above the bottom plate, the pressing plate and the bottom plate are arranged on the two fastening bolts in a penetrating way, the nut is connected onto the fastening bolt in a threaded way, the limiting block is arranged between the pressing plate and the bottom plate, the compression assembly is arranged on a working platform of a compression testing machine, the working platform is provided with a positioning hole for inserting a guide pillar, the bottom plate and the pressing plate are provided with a first limiting hole and a second limiting hole for arranging the guide pillar in a penetrating way, and the guide pillar is in sliding fit with the bottom plate and the pressing plate; the upper end of the guide pillar upwards penetrates out of the pressing plate, and the lower part of the pressing head of the compression testing machine is provided with an avoiding groove extending into the guide pillar. The compression device solves the problems of difficult compression, low efficiency and easy occurrence of the phenomenon of blocking of the conventional compression device for the rubber permanent deformation test.

Description

Rubber compression permanent deformation measuring device

Technical Field

The utility model relates to the technical field of rubber performance tests, in particular to a device for measuring the compression set of rubber.

Background

Compression set is one of the important indicators for rubber products, and is a physical and chemical change in the compressed state of rubber, which prevents the rubber from returning to its original state when the compressive force is removed, and thus the compression set is generated, the magnitude of the compression set depending on the temperature and time of the compression action and the temperature and time of the height return. National Standard GB/T7759.1-2015 determination of compression set of vulcanizates or thermoplastic rubber part 1: determination of compression set of vulcanizates or thermoplastic rubbers under Normal and high temperature conditions GB/T7759.2-2014 part 2: the "low temperature conditions" stipulates a test method for measuring the compression set of a rubber under the conditions of normal temperature, high temperature and low temperature. In the process of the test, need use compressor arrangement to press the sample to the height of shrinkage compression to regulation, a compression permanent deformation test device that has now, comprising a base plate, the clamp plate, the stopper, bolt and nut, the dress is worn to two bolts to clamp plate and bottom plate, the clamp plate sets up the position and the nut threaded connection that the clamp plate was worn out to the bolt above the bottom plate, the stopper is placed and is used for restricting the compression height on the bottom plate, place the rubber sample on the bottom plate during the use, operating personnel uses the spanner to turn round the nut on the bolt tightly, make the clamp plate decline compression sample, the up end up to clamp plate and stopper offsets, accomplish the compression to the rubber sample promptly. The permanent deformation test device with the structure mainly has the following problems: 1. need turn round tight bolt, nut with the spanner and compress the rubber sample, to the higher rubber sample of hardness, compress and get up very hard, still cause to turn round tight bolt thread damage easily, appear the card phenomenon of dying. 2. The efficiency is low, the generated compression force is small due to manual tightening, and the torsion condition can occur if too many samples are placed on each layer or the structure is designed into a multi-layer structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rubber compression permanent deformation measuring device which can solve the problems that the compression device of the existing rubber permanent deformation test is labor-consuming in compression, low in efficiency and easy to cause the phenomenon of blocking.

In order to solve the problems, the utility model adopts the technical scheme that: the rubber compression permanent deformation measuring device comprises a compression assembly, wherein the compression assembly comprises a bottom plate, a pressing plate, a limiting block, fastening bolts and nuts, the pressing plate is positioned above the bottom plate, the pressing plate and the bottom plate are arranged on two fastening bolts in a penetrating manner, the nuts are connected to the fastening bolts in a threaded manner, the limiting block is placed between the pressing plate and the bottom plate, the compression assembly is placed on a working platform of a compression testing machine, a positioning hole for inserting a guide pillar is formed in the working platform, a first limiting hole and a second limiting hole for arranging the guide pillar in a penetrating manner are formed in the bottom plate and the pressing plate, and the guide pillar is in sliding fit with the bottom plate and the pressing plate; the upper end of the guide pillar upwards penetrates out of the pressing plate, and the lower part of the pressure head of the compression testing machine is provided with an avoiding groove extending into the guide pillar.

In the above-described embodiments of the apparatus for measuring compression set of rubber, more specific embodiments may be: the limiting block is provided with a third limiting hole for penetrating the guide pillar.

Furthermore, one end of the limiting block extends out of the edges of the pressing plate and the bottom plate.

Furthermore, more than two pressure plates are provided, and the limiting blocks are also arranged between the adjacent pressure plates.

Furthermore, a limiting groove is formed in the pressing plate, the limiting groove extends to the edge of the pressing plate to form an opening, and the fastening bolt penetrates through the limiting groove.

Furthermore, the bottom plate is provided with a mounting groove for penetrating the fastening bolt, the mounting groove extends to the edge of the bottom plate to form an opening, the bottom of the bottom plate is provided with a countersunk groove corresponding to the mounting groove, and the bolt head of the fastening bolt is accommodated in the countersunk groove.

Further, the first limiting hole is arranged between the two mounting grooves in the middle, and the second limiting hole is arranged between the two limiting grooves in the middle.

Furthermore, the bottom plate and the pressing plate are both rectangular plates.

Furthermore, the fastening bolt is penetrated and installed on the width direction of the bottom plate and the pressure plate.

Further, the thickness of the pressing plate is smaller than that of the bottom plate.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. adopt compression testing machine to carry out mechanical compression, connect the work platform of compression subassembly and testing machine through the guide post, carry out quick location and compression direction, realize compressing steadily evenly, accomplish the rethread fastening bolt and nut after the compression and lock, compression efficiency is high, and is laborsaving, can not appear blocking among the compression process.

2. The limiting block is sleeved on the guide pillar, one end of the limiting block can extend out of the edge of the pressing plate and the edge of the bottom plate, and the limiting block can be quickly positioned and can detect whether the pressing plate and the bottom plate are compressed in place or not.

3. Set up polylith clamp plate, can realize a large amount of compressions of single, improve survey efficiency.

4. The pressing plate and the bottom plate are provided with open limiting grooves and mounting grooves, so that the pressing plate and the bottom plate can be conveniently and quickly assembled with fastening bolts; the arrangement of each hole position and the bolt penetrating position is beneficial to uniform compression.

5. The shape and thickness of the plate body can reduce the overall mass of the compression assembly, and the compression assembly is convenient to carry.

Drawings

FIG. 1 is a schematic view of the structure of the rubber compression set measuring apparatus.

Fig. 2 is a schematic structural diagram of a working platform of the compression tester.

Fig. 3 is a schematic view of the structure of the compressing assembly.

Fig. 4 is a bottom schematic view of the compression assembly.

Fig. 5 is a schematic view of the structure of the platen.

Fig. 6 is a schematic view of the structure of the bottom surface of the base plate.

Fig. 7 is a schematic structural diagram of a limiting block.

FIG. 8 is a schematic view showing the arrangement of a rubber sample.

The reference numbers illustrate: 10. a compression tester; 11. a working platform; 11-1, positioning holes; 12. a lifting column; 13. a cross beam; 14. a pressure lever; 15. a pressure head; 15-1, avoiding grooves; 20. a compression assembly; 21. a base plate; 21-1, a first limiting hole; 21-2, mounting grooves; 21-3, countersunk grooves; 22. pressing a plate; 22-1 and a second limiting hole; 22-2, a limiting groove; 23. a limiting block; 23-1 and a third limiting hole; 24. fastening a bolt; 25. a nut; 30. a guide post; 40. rubber test specimens.

Detailed Description

The utility model will be further described in detail with reference to the following examples:

the device for measuring the permanent deformation of rubber compression shown in fig. 1 and fig. 2 mainly comprises a compression testing machine 10, a compression assembly 20 and a guide post 30, wherein the compression testing machine 10 is a commercially available product, only a working platform 11 and a pressure head 15 are partially improved, a positioning hole 11-1 for inserting the guide post 30 is formed in the middle of the working platform 10, the compression assembly 20 is placed on the working platform 10, the compression assembly 20 is accurately positioned with the working platform 10 through the guide post 30, and the upper end of the guide post 30 extends upwards out of the compression assembly 20; an avoiding groove 15-1 capable of extending into the guide post 30 is formed in the lower portion of a pressure head 15 of the testing machine, the pressure head 15 is connected with a cross beam 13 through a pressure rod 14, the cross beam 13 is erected on two lifting columns 12, and the lifting columns 12 are driven to lift by a motor in the testing machine.

As shown in fig. 3 to 7, the compressing assembly 20 includes a bottom plate 21, a pressing plate 22, a limiting block 23, a fastening bolt 24 and a nut 25, the bottom plate 21 and the pressing plate 22 are rectangular plates, the thickness of the pressing plate 22 is smaller than that of the bottom plate 21, the pressing plate 22 is located right above the bottom plate 21, the number of the pressing plates 22 is selected according to the number of rubber samples 40 to be measured, the limiting block 23 is placed between the bottom plate 21 and the pressing plate 22 and between adjacent pressing plates 22, corners of the limiting block 23 are rounded, and the limiting block 23 can be processed into various thicknesses according to the standard requirements according to the test requirements; the bottom plate 21 and the pressing plate 22 are respectively provided with a first limiting hole 21-1 and a second limiting hole 22-1 in the middle corresponding to the positioning hole 11-1 of the working platform 11, the limiting block 23 is provided with a third limiting hole 23-1, the bottom plate 21, the pressing plate 22 and the limiting block 23 are sleeved on the guide pillar 30 through the limiting holes, the length of the limiting block 23 is larger than the width of the bottom plate 21 and the pressing plate 22, the limiting block 23 is sleeved on the guide pillar 30, the length direction of the limiting block 23 is arranged along the width direction of the bottom plate 21 and the pressing plate 22, one end of the limiting block is flush with one side edge of the bottom plate 21 and the pressing plate 22, and the other end of the limiting block extends out of the edges of the bottom plate 21 and the pressing plate 22 from the other side. In order to quickly assemble the bottom plate 21 and the pressing plate 22 on the fastening bolt 24, the positions, close to the edges of the two ends, in the width direction of the bottom plate 21 and the pressing plate 22 are respectively provided with an installation groove 21-2 and a limiting groove 22-2 for penetrating and installing the fastening bolt 24, the installation groove 21-2 extends to the edge of the bottom plate 21 to form an opening, and the limiting groove 22-2 extends to the edge of the pressing plate 22 to form an opening; a first limiting hole 21-1 on the bottom plate 21 is arranged between the two mounting grooves 21-2 in the center, and a second limiting hole 22-1 on the pressing plate 22 is arranged between the two limiting grooves 22-2 in the center; in addition, the bottom plate 21 has a thickness capable of concealing the bolt head of the fastening bolt 24, and in order to realize the concealing structure, a countersunk groove 21-3 corresponding to the mounting groove 21-2 is formed at the bottom of the bottom plate 21, the bolt head of the fastening bolt 24 is received in the countersunk groove 21-3, and a nut 25 is screwed to a portion of the fastening bolt 24 protruding upward from the pressing plate 22.

This rubber compression permanent deformation survey device's compression test machine host computer is by motor drive, convenient and fast, and labour saving and time saving can increase the number of piles of clamp plate 22 as required, improves work efficiency. When the positioning device is used, an operator firstly puts the bottom plate 21 on the working platform 11, penetrates the first limiting hole 21-1 in the middle of the bottom plate 21 by the guide pillar 30, inserts the guide pillar into the positioning hole of the working platform 11 and positions the bottom plate 21 and the working platform 11; then, a limiting block 23 with a proper thickness is selected, the limiting block 23 penetrates through the guide pillar 30 and is placed on the bottom plate 21, and the longer end of the limiting block 23 faces an operator, so that whether the limiting block 23 is pressed in place or not can be checked conveniently by shaking the limiting block 23; measuring the initial height of each rubber sample 40 by using a vernier caliper, recording, and respectively placing the rubber samples 40 on the upper end surface of the bottom plate 21, wherein the placed rubber samples 40 cannot be contacted with each other; placing a pressing plate 22, placing a limiting block 23 and a rubber sample 40 on the pressing plate 22 according to requirements, and then placing another pressing plate 22, wherein each layer can be used for placing two groups of samples which are dispersed on two sides of the guide pillar 30, each group comprises three samples, and the number of layers can be increased according to actual requirements; the lifting column 12 is driven to descend by controlling a button of a control panel of the compression testing machine 10, the beam 13 moves downwards, the pressure head 15 descends to press the pressure plate 22 on the uppermost layer downwards, the rubber sample 40 is compressed under the balanced pressure of the pressure plate 22, whether the pressure plate 22 is in contact with the limiting block 23 or not is observed in the compression process, the limiting block 23 is slightly shaken by hand, and if the limiting block 23 is compressed and cannot be shaken, the rubber sample 40 is compressed to the specified height; fastening the pressure plate 22 and the bottom plate 21 by using a fastening bolt 24, a washer and a nut 25, controlling the beam 13 of the compression testing machine 10 to move upwards, taking out the compression assembly 20, placing the compression assembly in a high-temperature box or a low-temperature box at normal temperature until the specified testing time, loosening the fastening bolt 24 and the nut 25 after the testing is finished, and taking out the rubber sample 40; the rubber sample 40 is restored in a standard laboratory environment for a predetermined time, and the height thereof is measured with a vernier caliper, and the compression set value is calculated by a standard formula.

Claims

1. The utility model provides a rubber compression permanent deformation survey device, includes compression assembly, compression assembly includes bottom plate, clamp plate, stopper, fastening bolt and nut, the clamp plate is located the bottom plate top, the clamp plate with the bottom plate is worn to adorn on two fastening bolt, nut threaded connection in fastening bolt is last, the clamp plate with placed between the bottom plate the stopper, its characterized in that: the compression assembly is placed on a working platform of a compression testing machine, a positioning hole for inserting a guide pillar is formed in the working platform, a first limiting hole and a second limiting hole for penetrating the guide pillar are formed in the bottom plate and the pressing plate, and the guide pillar is in sliding fit with the bottom plate and the pressing plate; the upper end of the guide pillar upwards penetrates out of the pressing plate, and the lower part of the pressure head of the compression testing machine is provided with an avoiding groove extending into the guide pillar.

2. The apparatus for measuring compression set of rubber according to claim 1, wherein: the limiting block is provided with a third limiting hole for penetrating the guide pillar.

3. The apparatus for measuring compression set of rubber according to claim 2, wherein: one end of the limiting block extends out of the edges of the pressing plate and the bottom plate.

4. The apparatus for measuring compression set of rubber according to claim 3, wherein: the pressing plate is provided with more than two pressing plates, and the limiting blocks are also arranged between the adjacent pressing plates.

5. The apparatus for measuring compression set of rubber according to claim 4, wherein: the clamp plate is provided with a limiting groove, the limiting groove extends to the edge of the clamp plate to form an opening, and the fastening bolt penetrates through the limiting groove.

6. The apparatus for measuring compression set of rubber according to claim 5, wherein: the bottom plate is provided with a mounting groove for penetrating the fastening bolt, the mounting groove extends to the edge of the bottom plate to form an opening, the bottom of the bottom plate is provided with a countersunk groove corresponding to the mounting groove, and the bolt head of the fastening bolt is accommodated in the countersunk groove.

7. The apparatus for measuring compression set of rubber according to claim 6, wherein: first spacing hole set up in the middle of two between the mounting groove, the spacing hole of second set up in the middle of two between the spacing groove.

8. The apparatus for measuring compression set of rubber according to any one of claims 1 to 7, wherein: the bottom plate and the pressing plate are both rectangular plates.

9. The apparatus for measuring compression set of rubber according to claim 8, wherein: the fastening bolt is penetrated and installed on the width direction of the bottom plate and the pressure plate.

10. The apparatus for measuring compression set of rubber according to claim 9, wherein: the thickness of the pressing plate is smaller than that of the bottom plate.