CN210487480U

CN210487480U - Spring tensile test device

Info

Publication number: CN210487480U
Application number: CN201921356447.7U
Authority: CN
Inventors: 曹明; 李维军; 万瑶; 徐文刚; 曹琴
Original assignee: Jiangxi Fuming Spring Manufacturing Co ltd
Current assignee: Jiangxi Fuming Spring Manufacturing Co ltd
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-05-08
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses a spring tensile test device, the on-line screen storage device comprises a base, the base both ends respectively with L shape slide fixed connection, L shape slide level is placed, L shape slide one side has welded first dead lever, first dead lever opposite side fixed mounting has the electron dynamometer, the measuring end and the second dead lever fixed connection of electron dynamometer, second dead lever and spring fixing device fixed connection, the spring that awaits measuring is installed to the last chucking of spring fixing device, the other end card of the spring that awaits measuring is on another spring fixing device, and the telescopic link fixed connection of another spring fixing device and pneumatic cylinder, pneumatic cylinder fixed mounting is at the support top, the support welds on the spout, spout and L shape slide sliding connection, the front side of L shape slide is equipped with first scale. The utility model has the advantages that: the device provides a spring tensile test device which has a good fixing effect on the spring and is convenient for measuring the yield limit parameter of the spring, and performs tensile test on the common spring.

Description

Spring tensile test device

Technical Field

The utility model relates to a spring test technical field especially relates to a spring tensile test device.

Background

A spring is a mechanical part that works by elasticity. The part made of elastic material deforms under the action of external force and restores to the original shape after the external force is removed. Also used as a "spring". Typically made of spring steel. The types of springs are complex and various, and mainly include spiral springs, volute springs, plate springs, special springs and the like according to the shapes. Among them, the extension spring (tension spring) is a coil spring that bears an axial tension, and the extension spring is generally made of a material having a circular cross section. The materials include stainless steel, piano steel, high carbon steel, phosphor copper, oil tempering alloy spring steel, etc. The elastic force calculation formula of the spring is as follows: f = kx, F is the spring force, k is the stiffness coefficient, and x is the length of the spring to be stretched (or shortened). However, the above calculation is only valid within the spring yield limit, and once this limit is exceeded, the spring force is no longer proportional to the length of the spring elongation (or shortening) and the spring cannot return to its original shape. It is therefore particularly important to explore the spring yield limit, which is often explored by the implementation of spring tension or compression resistance.

For example, the working principle of the gas spring tensile property detection device (publication number: CN 105806607A) disclosed in the Chinese patent is as follows: the upper end suit that will treat the air spring that detects can play the effect of support through second backup pad and first backup pad at colluding the position of portion, can catch on the air spring through the pull head of tensiometer, can conveniently carry out the pulling operation to the air spring through the pulling force machine to the convenient tensile properties who detects the air spring detects. Although the maximum tension of the gas spring at the yield limit can be measured by the tension meter, the device cannot record the elongation of the spring at the yield limit. In addition, the device is inconvenient for carrying out tensile property detection on the common spring, and the common spring is difficult to fix. To above defect, this device provides one kind and fixes effectually to the spring, is convenient for measure the spring tensile test device of spring yield limit parameter, carries out tensile test to ordinary spring, and this device can be used to the laboratory of the major study of industry and discipline class and use, also can be used to the device that spring manufacturer verified the spring yield limit and use, has simple structure, low in manufacturing cost's advantage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spring tensile test device, this device provide one kind to the spring fixed effectual, the spring tensile test device of the limit parameter of yielding of the measurement spring of being convenient for carries out tensile test to ordinary spring, and this device can be used to the laboratory of the university of the industry branch of academic or vocational study to use, also can be used to spring manufacturer to verify the device of the limit of yielding of spring and use, has simple structure, advantage that low in manufacturing cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a spring tensile test device, includes base, L shape slide, first dead lever, electron dynamometer, second dead lever, spring fixing device, the spring that awaits measuring, pneumatic cylinder, support, spout and first scale, its characterized in that: the base both ends respectively with L shape slide fixed connection, L shape slide level is placed, L shape slide one side has welded first dead lever, first dead lever opposite side fixed mounting has the electron dynamometer, the measuring end and the second dead lever fixed connection of electron dynamometer, second dead lever and spring fixing device fixed connection, the spring that awaits measuring is installed to the last chucking of spring fixing device, the other end card of the spring that awaits measuring is on another spring fixing device, and the telescopic link fixed connection of another spring fixing device and pneumatic cylinder, the telescopic link outside of pneumatic cylinder is equipped with the second scale, pneumatic cylinder fixed mounting is at the support top, the support welds on the spout, spout and L shape slide sliding connection, the front side of L shape slide is equipped with first scale, the spout passes through fixing bolt and the spacing fixed of L shape slide.

Further, the spring fixing device comprises a base plate, a U-shaped hinge, a fastening bolt, fastening claws and an arc-shaped fixing clamping block, one side of the base plate is welded on the second fixing rod, the other side of the base plate is fixedly provided with a pair of U-shaped hinges, the U-shaped hinges are hinged to the fastening claws, the two fastening claws are respectively in threaded connection with the fastening bolt, and the two fastening claws are clamped outside the spring to be tested through the arc-shaped fixing clamping block.

Furthermore, the top of the fastening bolt is provided with a hexagon nut, the upper half section of the fastening bolt is provided with a forward thread, the lower half section of the fastening bolt is provided with a reverse thread, the middle of the fastening claw is provided with a threaded hole, the upper fastening claw is provided with a threaded hole which is in forward threaded connection with the upper half section of the fastening bolt, and the lower fastening claw is provided with a threaded hole which is in reverse threaded connection with the lower half section of the fastening bolt.

Furthermore, the horizontal part of the L-shaped sliding seat is embedded in the sliding groove, and the cross section of the sliding groove is in an inverted 'C' shape and is clamped outside the L-shaped sliding seat.

Furthermore, the bottom of the base is provided with an anti-skid rubber pad.

Compared with the prior art, the utility model discloses following beneficial effect has: one is as follows: this device will await measuring the spring both ends joint between two spring fixing device, stretch the spring that awaits measuring through the pneumatic cylinder, has realized the tensile experiment to the spring that awaits measuring, has simple structure, low in manufacturing cost's advantage. The second step is as follows: in this device, the spring both ends that await measuring are fixed through spring fixing device, and are fixed effectual for the measurement of the spring elongation that awaits measuring is more accurate, and it is all very convenient that the spring that awaits measuring is installed and is dismantled, only needs rotatory fastening bolt to rotate and can accomplish. And thirdly: in the device, the first scale is arranged on the front side of the L-shaped sliding seat, so that the original length of the spring to be measured can be conveniently measured; the second scale is arranged outside the telescopic rod of the hydraulic cylinder, so that the elongation of the spring to be tested can be conveniently measured, and the original length and elongation data of the spring to be tested in the spring tensile test can be conveniently recorded.

Drawings

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

FIG. 2 is a schematic view of the structure at the position A of the present invention;

FIG. 3 is a sectional view of the L-shaped sliding seat and the sliding groove of the present invention;

in the figure: 1. a base; 2. an L-shaped slide seat; 3. a first fixing lever; 4. an electronic dynamometer; 5. a second fixing bar; 6. a spring fixing device; 6-1, a substrate; 6-2, a U-shaped hinge; 6-3, fastening bolts; 6-4, fastening claws; 6-5, fixing a clamping block in an arc shape; 7. a spring to be tested; 8. a hydraulic cylinder; 9. a support; 10. a chute; 11. a first scale; 12. fixing the bolt; 13. and a second scale.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

As shown in figure 1, a spring tensile test device comprises a base 1, an L-shaped sliding seat 2, a first fixing rod 3, an electronic dynamometer 4, a second fixing rod 5, a spring fixing device 6, a spring 7 to be tested, a hydraulic cylinder 8, a bracket 9, a chute 10 and a first scale 11, wherein two ends of the base 1 are respectively fixedly connected with the L-shaped sliding seat 2, the L-shaped sliding seat 2 is horizontally placed, the first fixing rod 3 is welded on one side of the L-shaped sliding seat 2, the electronic dynamometer 4 is fixedly installed on the other side of the first fixing rod 3, the measuring end of the electronic dynamometer 4 is fixedly connected with the second fixing rod 5, the second fixing rod 5 is fixedly connected with the spring fixing device 6, the spring 7 to be tested is tightly clamped on the spring fixing device 6, the other end of the spring 7 to be tested is clamped on the other spring fixing device 6, the other spring fixing device 6 is fixedly connected with a telescopic rod of the hydraulic cylinder 8, pneumatic cylinder 8 fixed mounting is in support 9 top, and support 9 welds on spout 10, and spout 10 and L shape slide 2 sliding connection, the front side of L shape slide 2 are equipped with first scale 11. The sliding groove 10 is limited and fixed with the L-shaped sliding seat 2 through a fixing bolt 12. Wherein, the external power supply is electrically connected with the electronic dynamometer 4, and the hydraulic cylinder 8 is connected with an external hydraulic oil circuit. The horizontal part of the L-shaped sliding seat 2 is embedded in the sliding groove 10, and the section of the sliding groove 10 is in an inverted 'C' shape and is clamped outside the L-shaped sliding seat 2. Wherein, the bottom of the base 1 is provided with an antiskid rubber pad.

As shown in FIG. 2, the spring fixing device 6 comprises a base plate 6-1, a U-shaped hinge 6-2, a fastening bolt 6-3, a fastening claw 6-4 and an arc-shaped fixing and clamping block 6-5, one side of the base plate 6-1 is welded on a second fixing rod 5, a pair of U-shaped hinges 6-2 is fixedly arranged on the other side of the base plate 6-1, the U-shaped hinge 6-2 is hinged with the fastening claw 6-4, the two fastening claws 6-4 are respectively in threaded connection with the fastening bolt 6-3, and the two fastening claws 6-4 are clamped outside a spring 7 to be tested through the arc-shaped fixing and clamping block 6-5. The top of the fastening bolt 6-3 is provided with a hexagon nut, the upper half section of the fastening bolt is provided with a forward thread, the lower half section of the fastening bolt is provided with a reverse thread, the middle of the fastening claw 6-4 is provided with a threaded hole, the threaded hole of the fastening claw 6-4 at the upper part is connected with the upper half section of the fastening bolt 6-3 by the forward thread, and the threaded hole of the fastening claw 6-4 at the lower part is connected with the lower half section of the fastening bolt 6-3 by the reverse thread. When the fastening bolt 6-3 is rotated, the hexagonal nut at the top of the fastening bolt 6-3 can be rotated only by using a spanner or a sleeve.

It should be noted that, the utility model relates to a spring tensile test device, this device can be used to the laboratory of the class school of industry and branch of academic or vocational study and use, also can be used to the spring firm to verify the use of spring yield limit, during the use:

1. the device is placed on a test bed;

2. placing a spring 7 to be tested between the two fastening claws 6-4, enabling the two fastening claws 6-4 to approach each other by rotating the fastening bolt 6-3, clamping and fixing the spring 7 to be tested by utilizing an arc-shaped fixing and clamping block 6-5 fixedly and integrally connected with the fastening claws 6-4, and fixing the spring 7 to be tested between the two spring fixing devices 6;

3. the power supply of the electronic dynamometer 4 is switched on, whether the spring is in the original length can be judged by observing the reading of the electronic dynamometer 4, the fixing bolt 12 is screwed when the spring is in the original length, the L-shaped sliding seat 2 and the spring fixing device 6 are mutually fixed, the lattice number of the first scale 11 on the front side of the L-shaped sliding seat 2 in the original length of the spring is read, and recording is carried out; when the two spring fixing devices 6 are contacted with each other, the sliding groove 10 is located at the leftmost position, the first scale 11 is zero, and after the spring 7 to be tested is installed, the number of the first scale 11 is the original length of the spring 7 to be tested;

4. starting an oil path connected with the hydraulic cylinder 8, recording the position of the second scale 13 at the moment, then, contracting an expansion link of the hydraulic cylinder 8, penetrating through the reading change of the electronic dynamometer 4, beginning to change linearly, disconnecting the oil path outside the hydraulic cylinder 8 when the electronic dynamometer 4 is observed to change suddenly or not change linearly, recording the position of the second scale 13 at the moment, and measuring the elongation of the spring 7 to be measured when the spring is at the yield limit when the spring reaches the yield limit.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a spring tensile test device, includes base, L shape slide, first dead lever, electron dynamometer, second dead lever, spring fixing device, the spring that awaits measuring, pneumatic cylinder, support, spout and first scale, its characterized in that: the base both ends respectively with L shape slide fixed connection, L shape slide level is placed, L shape slide one side has welded first dead lever, first dead lever opposite side fixed mounting has the electron dynamometer, the measuring end and the second dead lever fixed connection of electron dynamometer, second dead lever and spring fixing device fixed connection, the spring that awaits measuring is installed to the last chucking of spring fixing device, the other end card of the spring that awaits measuring is on another spring fixing device, and the telescopic link fixed connection of another spring fixing device and pneumatic cylinder, the telescopic link outside of pneumatic cylinder is equipped with the second scale, pneumatic cylinder fixed mounting is at the support top, the support welds on the spout, spout and L shape slide sliding connection, the front side of L shape slide is equipped with first scale, the spout passes through fixing bolt and the spacing fixed of L shape slide.

2. A spring tensile test apparatus according to claim 1, wherein: the spring fixing device comprises a base plate, a U-shaped hinge, a fastening bolt, fastening claws and an arc-shaped fixing clamping block, wherein one side of the base plate is welded on the second fixing rod, the other side of the base plate is fixedly provided with a pair of U-shaped hinges, the U-shaped hinges are hinged with the fastening claws, the two fastening claws are respectively in threaded connection with the fastening bolt, and the two fastening claws are clamped outside the spring to be tested through the arc-shaped fixing clamping block.

3. A spring tensile test apparatus according to claim 2, wherein: the top of the fastening bolt is provided with a hexagon nut, the upper half section of the fastening bolt is provided with a clockwise thread, the lower half section of the fastening bolt is provided with a counter thread, the middle of the fastening claw is provided with a threaded hole, the upper fastening claw is provided with a threaded hole which is in clockwise threaded connection with the upper half section of the fastening bolt, and the lower fastening claw is provided with a threaded hole which is in counter threaded connection with the lower half section of the fastening bolt.

4. A spring tensile test apparatus according to claim 1, wherein: the horizontal part of the L-shaped sliding seat is embedded in the sliding groove, and the cross section of the sliding groove is in an inverted 'C' shape and is clamped outside the L-shaped sliding seat.

5. A spring tensile test apparatus according to claim 1, wherein: the bottom of the base is provided with an anti-skid rubber pad.