CN211013896U

CN211013896U - Needle wear resistance testing device

Info

Publication number: CN211013896U
Application number: CN201921752990.9U
Authority: CN
Inventors: 薛同乐; 宋扬; 薛淞
Original assignee: QINGDAO JINZUAN NEEDLES CO Ltd
Current assignee: QINGDAO JINZUAN NEEDLES CO Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-07-14
Anticipated expiration: 2029-10-18

Abstract

The utility model belongs to the technical field of the needle test and specifically relates to a needle wearability testing arrangement. The sand scraping device comprises a bottom plate, a sand scraping device, a sand disc and a sand disc moving mechanism, wherein the sand disc is arranged on the bottom plate through the sand disc moving mechanism, the sand scraping device is arranged in the sand disc and is connected with the bottom plate through a sand scraping device support, and sand for testing is filled in the sand disc; the bottom of the sand scraper is lower than the upper surface of the sand layer, and the middle parts of the left side surface and the right side surface of the sand scraper are both inwards sunken. The wear and the destructiveness of the needle caused in use are simulated, and various wear-resistant data of the needle can be quickly and accurately obtained.

Description

Needle wear resistance testing device

Technical Field

The invention relates to the field of needle testing, in particular to a needle wear resistance testing device.

Background

The needle has a wide application field and a long history in daily production and life, and the abrasion resistance of the needle is directly related to the service life and the periodicity of replacing a new needle. However, there is no professional detection tool and rapid scientific detection means for the worn parts such as needle points, needle hooks and the like, and results and evaluations cannot be obtained in advance for the service lives and wear resistances of various needles, so that the following problems are brought about:

1. the user of the needle can only obtain the wear resistance data of various types of needles through practical application and a long service time, so that the most scientific, reasonable and economical needle changing period and production process cannot be made in advance.

2. Because the wear resistance of the needle cannot be predicted, when the needle is used for producing certain aerospace parts and carbon fiber and ceramic fiber composite materials with extremely high abrasion amount, once the needle is worn out too quickly and fails to cause frequent replacement of the needle, great difference is generated in the internal density of the composite materials, and the results of poor surface flatness, poor thickness uniformity, product scrapping and the like can also be generated.

3. When carbon/carbon and carbon/ceramic composite materials for aerospace are produced, once needles with poor wear resistance are used, needles are worn too fast in actual production, a large amount of worn metal particles remain in a composite material body, and when the carbon fiber composite materials are carbonized at a high temperature of more than 3000 ℃, excessive metal particles can generate a gasification effect, so that more 'cavities' are left in the prepared carbon fiber material body, and the internal quality and various performance indexes of the composite materials are influenced.

4. Because the wear resistance and the service life of the needle cannot be known in advance, the needle changing period cannot be scientifically made, and the method is often too late to process products (such as filament spun-bonded needle punching) of which the production process cannot be stopped, so that a large amount of raw materials are wasted and unqualified products are produced.

5. When the purchasing side and the supplying side dispute on the wear resistance and the service life, scientific and convincing data information cannot be taken out in a short time, and disputes can be rapidly solved.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a needle wear resistance testing device which simulates the wear and the destructiveness of a needle in use and realizes quick and accurate acquisition of various wear resistance data of the needle.

The technical scheme of the invention is as follows: a needle abrasion resistance testing device comprises a bottom plate, a sand scraper, a sand plate and a sand plate moving mechanism, wherein the sand plate is arranged on the bottom plate through the sand plate moving mechanism, the sand scraper is arranged in the sand plate and is connected with the bottom plate through a sand scraper support, and sand for testing is filled in the sand plate; the bottom of the sand scraper is lower than the upper surface of the sand layer, and the middle parts of the left side surface and the right side surface of the sand scraper are both inwards sunken.

In the invention, a middle partition plate is arranged in the sand disc, sand is arranged on the middle partition plate, and an ultrasonic vibrator is arranged below the middle partition plate.

The sand scraper support comprises a transverse support and a vertical support fixedly connected with the end portion of the transverse support, the transverse support is located above the sand table, the vertical support is located on the side face of the sand table, the bottom of the vertical support is connected with the bottom plate through a sucking disc, and the sand scraper is arranged on the transverse support of the sand scraper support.

The sand scraper can be connected with the transverse bracket of the sand scraper bracket in a sliding way and also can be fixedly connected.

The sand table movement mechanism comprises an X-direction movement mechanism and a Y-direction movement mechanism, the Y-direction movement mechanism comprises a Y-direction sliding plate, a Y-direction ball screw, a Y-direction sliding rail and a Y-direction sliding block, and the X-direction movement mechanism comprises an X-direction sliding plate, an X-direction ball screw, an X-direction sliding rail and an X-direction sliding block;

a Y-direction ball screw is arranged in the middle of the bottom of the Y-direction sliding plate and connected with a servo motor, the Y-direction sliding plate reciprocates along the axial direction of the Y-direction ball screw, a Y-direction sliding block is fixed at the bottom of the Y-direction sliding plate and sleeved on the Y-direction sliding rail, and the Y-direction sliding block slides along the Y-direction sliding rail; an X-direction ball screw is arranged in the middle of the bottom of the X-direction sliding plate and connected with a servo motor, the X-direction sliding plate moves in a reciprocating mode along the axial direction of the X-direction ball screw, an X-direction sliding block is fixed at the bottom of the X-direction sliding plate and sleeved on the X-direction sliding rail, and the X-direction sliding block slides along the X-direction sliding rail;

the Y is to the bottom fixed connection of slide and sand table, and Y is to the upper surface fixed connection of slide and X to the slide, and X is fixed on the bottom plate to the slide.

The sand table motion mechanism comprises a base and a rotary table, the rotary table is connected with the upper surface of the base, the sand table is fixedly connected with the upper surface of the rotary table, and the rotary table rotates to drive the sand table to rotate.

The sucking disc adopts magnetic chuck, and magnetic chuck passes through magnetic force and is connected with the bottom plate.

The invention has the beneficial effects that: the needle wear resistance testing device can accurately test the wear resistance and the service life of the needle, and various wear resistance data of the needle can be rapidly and accurately obtained.

Drawings

FIG. 1 is a schematic view of the structure of the present invention in example 1;

FIG. 2 is a schematic diagram of the structure of the present invention during use;

fig. 3 is a schematic structural view of the present invention in example 2.

In the figure: 1, a bottom plate; 2, a sand scraper; 3 a scraper bracket; 4, a sand disc; 5, sand; 6Y-direction sliding plates; a 7X-direction sliding plate; 8X-direction sliding blocks; a 9X-direction sliding rail; a 10X-direction ball screw; 11 a middle partition plate; 12 an ultrasonic vibrator; 13Y-direction ball screw; 14, a sucker; 15Y-direction sliding rails; a 16Y-direction slider; 17 a base; 18 a turn disc; 19 needle plates; 20 a support; 21 an electronic image measuring instrument; 22 placing the plate; 23 pressure sensor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the scope of the invention is not limited by the specific embodiments disclosed below.

Example 1

As shown in fig. 1, the needle wear resistance testing device of the present invention includes a bottom plate 1, a sand scraper 2, a sand table 4 and a sand table movement mechanism, wherein the sand table movement mechanism is arranged below the sand table 4, and the sand table 4 is arranged on the bottom plate 1 through the sand table movement mechanism. The sand disc 4 is internally provided with a sand scraper 2, and the sand scraper 2 is connected with the bottom plate 1 through a sand scraper support 3. The sand disk 4 is filled with sand 5 for testing, the sand 5 can be artificial diamond, boron carbide, silicon carbide, metal, plastic, wood, ceramic, glass and other granular abrasive materials, and the sand for testing can be not only sand in the traditional sense, but also other granular, powdery, pasty and mortar-shaped substances with different meshes and capable of realizing abrasion.

Scrape sand ware support 3 including horizontal support and with the vertical support of the both ends fixed connection of horizontal support, horizontal support is located the top of abrasive disc 4, vertical support is located the both sides of abrasive disc 4 respectively, the bottom of vertical support is passed through sucking disc 14 and is connected with bottom plate 1, and the sucking disc in this embodiment adopts magnetic chuck, and magnetic chuck passes through magnetic force and is connected with bottom plate 1. The sand scraper support 3 can also be directly connected with the bottom plate 1 through bolts or clamping devices. Scrape 2 middle parts of sand ware and be equipped with the through-hole, scrape that sand ware 2 passes through the through-hole cover on the horizontal support of scraping sand ware support 3, be sliding connection between sand ware 2 and the sand ware support 3. In the invention, other structures capable of realizing sliding connection can be adopted between the sand scraper 2 and the sand scraper bracket 3.

The sand scraper 2 is arranged in the sand disc 4, and the bottom of the sand scraper 2 is lower than the upper surface of the sand layer. The middle parts of the two side surfaces of the sand scraper 2 are all sunken inwards, the sand scraper in the embodiment is formed by fixedly connecting two symmetrical wedge-shaped bodies, the side surfaces of the sand scraper are formed by connecting two rectangular surfaces, the connecting part of the sand scraper is sunken inwards, the side surfaces of the sand scraper can also be arc-shaped surfaces sunken towards the middle part, the shape of the side surfaces is not limited, and sand can be folded towards the middle part of the sand plate to ensure the flatness of the upper surface of the sand layer.

In addition, in order to ensure the consistency of the sand density and the automatic resetting of the sand, in the embodiment, a middle partition plate 11 is arranged in the sand tray 4, the sand is arranged on the middle partition plate 11, a plurality of ultrasonic vibrators 12 are arranged below the middle partition plate 11, and the middle partition plate 11 vibrates under the vibration action of the ultrasonic vibrators 12 so as to drive the sand to vibrate, so that the automatic resetting of the sand is realized, and a sand pit left when the test needle is pulled out is automatically filled. According to the invention, the sand scraper 2 and the ultrasonic vibrator 12 are utilized to realize automatic reset of sand after the needle abrasion detection process, and ensure the compactness of the sand, the flatness of the surface of a sand layer and the consistency of the height of the surface of the sand layer.

The sand table movement mechanism in the embodiment comprises an X-direction movement mechanism and a Y-direction movement mechanism, the Y-direction movement mechanism is arranged above the X-direction movement mechanism, and the Y-direction movement mechanism can also be arranged below the X-direction movement mechanism and can be flexibly arranged according to specific use conditions. The Y-direction movement mechanism comprises a Y-direction sliding plate 6, a Y-direction ball screw 13, a Y-direction sliding rail 15 and a Y-direction sliding block 16, and the X-direction movement mechanism comprises an X-direction sliding plate 7, an X-direction ball screw 10, an X-direction sliding rail 9 and an X-direction sliding block 8. The Y-direction sliding plate 6 is fixedly connected with the bottom of the sand disc 4, a Y-direction ball screw 13 is arranged in the middle of the bottom of the Y-direction sliding plate 6, the Y-direction ball screw 13 is connected with a servo motor, and the servo motor acts to drive the Y-direction sliding plate 6 to reciprocate along the axial direction of the Y-direction ball screw 13 while the Y-direction ball screw 13 rotates. In order to ensure the stability of the Y-direction sliding plate 6 in the moving process along the Y direction, two Y-direction sliding blocks 16 are fixed at the bottom of the Y-direction sliding plate 6, the Y-direction sliding blocks 16 are sleeved on the Y-direction sliding rails 15, the Y-direction sliding blocks 16 slide along the Y-direction sliding rails 15, and the Y-direction sliding rails 15 are fixedly connected with the upper surface of the X-direction sliding plate 7. Through setting up Y to slider 16 and Y to slide rail 15, realized the stationarity of Y to slide 6 along the reciprocating motion in the Y direction. In the present invention, the Y-direction slider 16 and the Y-direction slide rail 15 are not limited to the number and the position in the present embodiment, and the position and the number thereof may be adjusted according to the actual structural requirement.

The structure of the X-direction movement mechanism is similar to that of the Y-direction movement mechanism, but the arrangement direction is different. The upper surface of the X-direction sliding plate 7 is fixedly connected with the Y-direction sliding rail 15, the X-direction ball screw 10 is arranged in the middle of the bottom of the X-direction sliding plate 7, the X-direction ball screw 10 is connected with the servo motor, and the servo motor acts to drive the X-direction sliding plate 7 to reciprocate along the X-direction ball screw 10 while the X-direction ball screw 10 rotates. In order to ensure the stability of the X-direction sliding plate 7 in the moving process along the X direction, two X-direction sliding blocks 8 are fixed at the bottom of the X-direction sliding plate 7, the X-direction sliding blocks 8 are sleeved on the X-direction sliding rails 9, the X-direction sliding blocks 8 slide along the X-direction sliding rails 9, and the X-direction sliding rails 15 are fixed on the bottom plate 1. Through setting up X to slider 8 and X to slide rail 9, realized X to the stationarity of slide 7 along X to the reciprocating motion in-process. In the present invention, the number and the position of the X-direction slider 8 and the X-direction slide rail 9 are not limited to those in the present embodiment, and the position and the number thereof may be adjusted according to the actual structural requirement.

The cross sections of the X-direction slide rail 9 and the Y-direction slide rail 15 can be arc-shaped as shown in the figure, and can also be wedge-shaped as long as the slide block can be ensured to be nested on the slide rail. The invention realizes the reciprocating movement of the sand disc in the X direction and the Y direction by arranging the X-direction movement mechanism and the Y-direction movement mechanism, and the movement speed and the movement distance of the sand disc are adjustable under the control of the servo motor. The sand disc can do linear motion along the X direction and the Y direction, and can also do rectangular operation, S linear operation, circumferential operation, spiral linear operation and irregular linear operation. When the test needle is repeatedly inserted into and drawn out of the sand to carry out abrasion test, the sand disc can run according to a track specified by a preset program, so that the inserted point of the test needle is not repeated every time, namely, the last inserted point cannot be inserted in the process of reinserting the test needle, and the consistency of the friction force in the test process of the test needle is ensured. In the movement process of the sand tray, the bottom of the sand scraper 2 is always contacted with the upper surface of the sand, so that the heights of the upper planes of the sand are always consistent, and the insertion depths of the tested needles are also consistent each time; meanwhile, the sand discharging device has the function of discharging the inserted test needle to the sand in the empty test area and withdrawing the test needle to the test area.

The procedure for testing the wear resistance and the service life of the needle using the present invention is as follows. The needle wear resistance testing device can test a single testing needle b, can also test a plurality of testing needles b of the same model at the same time, and has the same testing conditions of the plurality of testing needles b. The test of the test pin b has good repeatability. Because their test programs, test conditions and various data are stored in the same way, when the same test pin is tested at different times, the previous test program is called from the electric control device.

As shown in fig. 2, the needle wear resistance testing device a is disposed on a placing plate 22, the placing plate 22 is disposed on a support 20, and an electronic image measuring instrument 21 is disposed on the support 20 near a testing needle b. By the up-and-down reciprocating movement of the needle plate 19 and the placing plate 22, the test needles b are inserted into the sand in the sand tray at a certain frequency, and the insertion depth of the test needles b is accurately set by the reciprocating distance of the needle plate 19 relative to the placing plate 22. Along with the extension of the testing time and the increase of the reciprocating times of the testing needle b, the needle point and the pricking hook of the testing needle b are worn, the pricking force of the testing needle b is exhausted, the pressure sensor 23 can transmit the measured data to the electric control device in real time, and a display screen in the electric control device automatically generates a line graph and data. When the needle penetration force is reduced to a certain value, for example, 50% or more lower than the maximum value, the test is stopped, and the test needles b of the abrasion test are subjected to image comparison and data measurement comparison one by the electronic image measuring instrument 21.

Example 2

As shown in fig. 3, unlike embodiment 1: the sand table motion mechanism in this embodiment includes a base 17 and a rotary table 18, the rotary table 18 is connected with the upper surface of the base 17, and the sand table 4 is fixedly connected with the upper surface of the rotary table 18. The rotary disk 18 can be connected with a servo motor through a central shaft, and the servo motor drives the rotary disk 18 to rotate when working, so that the rotation of the sand disk 4 is realized. The sand disk 4 rotates the in-process, through the contact of scraping sand ware 2 and sand, makes the upper surface height on sand bed unanimous all the time. Simultaneously in order to guarantee that the sand pit that leaves when taking out the test needle fills up automatically, be equipped with median septum 11 in the sand tray 4, the sand setting is on median septum 11, and the bottom of median septum 11 is equipped with several ultrasonic vibrator 12, has realized the automatic re-setting of sand through ultrasonic vibrator 12, has guaranteed the closely knit degree of needle test in-process sand, has guaranteed the accuracy of needle wearability and life test.

In this embodiment, scrape sand ware support 3 include horizontal support and with the vertical support of the one end fixed connection of horizontal support, horizontal support is located the top of sand table 4, vertical support is located the side of sand table 4, the bottom of vertical support is passed through sucking disc 14 and is connected with bottom plate 1, scrape sand ware 2 and the horizontal support fixed connection of sand ware support 3.

Otherwise, the same procedure as in example 1 was repeated.

The needle wear resistance testing device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A needle wearability testing arrangement which characterized in that: the sand scraping device comprises a bottom plate (1), a sand scraper (2), a sand tray (4) and a sand tray moving mechanism, wherein the sand tray (4) is arranged on the bottom plate (1) through the sand tray moving mechanism, the sand scraper (2) is arranged in the sand tray (4), the sand scraper (2) is connected with the bottom plate (1) through a sand scraper support (3), and sand (5) for testing is filled in the sand tray (4); the bottom of the sand scraper (2) is lower than the upper surface of the sand layer, and the middle parts of the left side surface and the right side surface of the sand scraper (2) are both inwards sunken.

2. The needle wear testing device of claim 1, wherein: a middle partition plate (11) is arranged in the sand tray (4), sand is arranged on the middle partition plate (11), and an ultrasonic vibrator (12) is arranged below the middle partition plate (11).

3. The needle wear testing device of claim 1, wherein: the sand scraper support (3) comprises a transverse support and a vertical support fixedly connected with the end of the transverse support, the transverse support is located above the sand plate (4), the vertical support is located on the side face of the sand plate (4), the bottom of the vertical support is connected with the bottom plate (1) through a suction disc (14), and the sand scraper (2) is arranged on the transverse support of the sand scraper support (3).

4. The needle wear testing device of claim 3, wherein: the sand scraper (2) is connected with the transverse bracket of the sand scraper bracket (3) in a sliding way.

5. The needle wear testing device of claim 3, wherein: the sand scraper (2) is fixedly connected with the transverse bracket of the sand scraper bracket (3).

6. The needle wear testing device of claim 1, wherein: the sand table movement mechanism comprises an X-direction movement mechanism and a Y-direction movement mechanism, the Y-direction movement mechanism comprises a Y-direction sliding plate (6), a Y-direction ball screw (13), a Y-direction sliding rail (15) and a Y-direction sliding block (16), and the X-direction movement mechanism comprises an X-direction sliding plate (7), an X-direction ball screw (10), an X-direction sliding rail (9) and an X-direction sliding block (8);

the Y-direction sliding plate is fixedly connected with the bottom of the sand disc (4), the Y-direction sliding rail is fixedly connected with the upper surface of the X-direction sliding plate, and the X-direction sliding rail is fixed on the bottom plate.

7. The needle wear testing device of claim 1, wherein: the sand table motion mechanism comprises a base (17) and a rotary table (18), the rotary table (18) is connected with the upper surface of the base (17), the sand table (4) is fixedly connected with the upper surface of the rotary table (18), and the rotary table (18) rotates to drive the sand table (4) to rotate.

8. The needle wear testing device of claim 3, wherein: the sucker (14) is a magnetic sucker, and the magnetic sucker is connected with the bottom plate (1) through magnetic force.

9. The needle wear testing device of claim 1, wherein: the sand scraper (2) is formed by fixedly connecting two symmetrical wedge-shaped bodies.

10. The needle wear testing device of claim 1, wherein: the side surface of the sand scraper (2) is an arc-shaped surface which is sunken towards the middle part.