Clamping and positioning device of ceramic fiber tension tester

Abstract

The utility model discloses a clamping and positioning device of a ceramic fiber tension tester, which comprises an upper clamping component for positioning an upper reinforcing sheet and a lower clamping component for positioning a lower reinforcing sheet, the upper clamping assembly comprises two positioning pieces arranged on one of the upper clamping plates and installation pieces fixedly arranged at the same ends of the two positioning pieces. The lower clamping assembly comprises a stop lever and a stop piece which are arranged on one of the lower clamping plates. Through the arrangement of the upper clamping assembly and the lower clamping assembly, an upper positioning groove and a lower positioning groove can achieve the positioning effect on the upper reinforcing piece, the upper reinforcing piece is kept in a vertical and stable state and does not shake, the two sides of the lower reinforcing piece are blocked by the blocking rod and the blocking piece correspondingly and do not shake easily, and under the blocking effect of the blocking rod and the blocking piece, the lower reinforcing piece is clamped. The lower reinforcing piece can be accurately located at the position of the containing area, so that the lower clamping plate is not prone to being clamped obliquely in the clamping process, and the coaxiality of the upper reinforcing piece and the lower reinforcing piece can be effectively guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of ceramic fiber tension testing, in particular to a clamping and positioning device for a ceramic fiber tension testing machine. Background Art

[0002] Ceramic fiber yarn has the advantages of high temperature resistance, low thermal conductivity, thermal shock resistance, low heat capacity, excellent high-temperature insulation performance, and long service life. The tensile strength of ceramic fiber yarn is one of the means to evaluate the performance of ceramic fiber. In the existing technology, when producing ceramic fiber yarn, in order to ensure the quality of ceramic fiber yarn and prevent unqualified ceramic fiber yarn from entering the market, a tensile testing machine is generally used to test the tensile strength of ceramic fiber yarn.

[0003] Before testing the ceramic fiber yarn, stick reinforcing sheets on the upper and lower ends of the ceramic fiber yarn to facilitate clamping of the tensile testing machine for testing. Figure 1 As shown, conventional tensile testing machines currently available on the market usually include an upper clamping arm 11 for clamping an upper reinforcing sheet 10 and two upper clamping plates 12 fixed on the upper clamping arm 11, as well as a lower clamping arm 13 for clamping a lower reinforcing sheet 20 and two lower clamping plates 14 fixed on the lower clamping arm 13. The traditional method is usually that the operator holds the upper reinforcing sheet 10 of the ceramic fiber yarn by hand and brings it to the position of the upper clamping plate 12 of the tensile testing machine for clamping by the upper clamping plate 12. After the upper clamping plate 12 is clamped, the lower clamping plate 14 is used to clamp its lower reinforcing sheet 20. The upper clamping arm and the lower clamping arm are moved back to back to perform a tensile test on the ceramic fiber yarn.

[0004] Since ceramic fiber filaments are relatively thin and have a high elastic modulus, the ceramic fiber filaments need to be in a vertical state when using a tensile testing machine for tensile testing, and their upper and lower ends need to have high coaxiality in order to measure valid data. However, after the upper splint clamps the upper reinforcement plate, the lower reinforcement plate is prone to shaking, causing the lower splint to clamp crookedly. This makes it difficult for operators to ensure the coaxiality of the upper and lower ends of the ceramic fiber filaments when placing them. If the coaxiality deviation of the upper and lower ends of the ceramic fiber filaments is large, transverse force is easily generated during the ceramic fiber filament testing, causing the ceramic fiber filament to break prematurely, and the elastic modulus is abnormal, resulting in invalid valid data. Therefore, it is necessary to study a clamping and positioning device to ensure the coaxiality of the upper and lower ends of the ceramic fiber filaments.

[0005] In view of this, the applicant conducted in-depth research on the above issues, which led to the present case. Summary of the Invention

[0006] The purpose of the utility model is to provide a ceramic fiber wire tensile testing machine clamping and positioning device which has a simple structure and can effectively ensure the coaxiality of the ceramic fiber wire.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solution:

[0008] The two fixing plates are located at the top and bottom of the two fixing blocks, and the fixing blocks are located at the bottom and bottom of the two fixing blocks, respectively.

[0009] Furthermore, the upper clamping arm of the tensile testing machine is provided with a first mounting hole for installing the upper clamping assembly and a first bolt fastener cooperating with the first mounting hole, and the mounting plate is provided with a mounting groove for the first bolt fastener to pass through and be fixed.

[0010] Furthermore, the lower clamping arm of the tensile testing machine is provided with a second mounting hole for mounting the lower clamping assembly and a second bolt fastener engaging with the second mounting hole, and further includes a mounting base for fixing the barrier rod, the mounting base being fixed to the lower clamping arm via the second bolt fastener.

[0011] Furthermore, the mounting seat has a clamping groove and a third bolt fastener for clamping the clamping groove, the blocking rod is an L-shaped rod, one end of the blocking rod is a fixed part that can be extended into the clamping groove, and the other end of the blocking rod is a blocking part extending toward the other lower clamping plate, and a placement area is formed between the blocking part and the blocking plate.

[0012] Furthermore, the blocking piece extends from one of the lower clamping plates toward the other lower clamping plate, and the distance between the blocking piece and the blocking rod gradually increases.

[0013] By adopting the above-mentioned design scheme, the beneficial effects of the utility model are:

[0014] By setting up an upper clamping assembly and a lower clamping assembly, the upper reinforcement plate is placed in the positioning groove of the positioning plate. The upper and lower positioning grooves can position the upper reinforcement plate, so that it maintains a vertical and stable state and will not shake. Since the positioning groove of the upper clamping assembly and the placement area of ​​the lower clamping assembly are on the same vertical plane, the two sides of the lower reinforcement plate are respectively blocked by the baffle rod and the baffle plate and are not easy to shake. Under the blocking action of the baffle rod and the baffle plate, the lower reinforcement plate can be accurately located in the placement area, so that it is not easy to be crooked when clamped by the lower splint, and the coaxiality of the upper and lower reinforcement plates can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of a tensile testing machine in a clamping and positioning device of a ceramic fiber tensile testing machine in the prior art.

[0016] Figure 2 This is a schematic diagram of the clamping and positioning device of the ceramic fiber tensile testing machine of the present invention being arranged on the tensile testing machine. In the figure, the ceramic fiber is not placed on the clamping and positioning device.

[0017] Figure 3 This is a schematic diagram of a clamping and positioning device in a ceramic fiber tensile testing machine of the present invention, in which the clamping and positioning device is arranged on the tensile testing machine. In the figure, the ceramic fiber is placed on the clamping and positioning device.

[0018] In the picture:

[0019] 10-upper reinforcement plate; 11-upper clamping arm;

[0020] 12-upper clamp; 13-lower clamp arm;

[0021] 14-lower clamping plate; 15-first bolt fastener;

[0022] 16-second bolt fastener; 17-mounting seat;

[0023] 18-third bolt fastener; 2-upper clamping assembly

[0024] 20-lower reinforcement plate; 21-positioning plate

[0025] 22-mounting piece; 23-positioning slot;

[0026] 24-mounting slot; 3-lower clamping assembly;

[0027] 31-blocking rod; 32-blocking piece;

[0028] 311-fixing portion; 312-stopping portion. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figures 1 to 3 As shown, a ceramic fiber yarn tensile testing machine clamping and positioning device includes an upper clamping assembly 2 for positioning an upper reinforcing plate 10 and a lower clamping assembly 3 for positioning a lower reinforcing plate 20. The upper clamping assembly 2 includes two positioning pieces 21 arranged on one of the upper clamping plates 12 and a mounting piece 22 fixed to the same end of the two positioning pieces 21. The mounting piece 22 is fixed to the upper clamping arm 11. The two positioning pieces 21 are fixed to the upper clamping arm 11 of the tensile testing machine through the mounting piece 22. The two positioning pieces 21 are arranged at intervals up and down. The two positioning pieces 21 have the same structure and are respectively located on the upper and lower sides of the upper clamping plate 12, and will not affect the clamping work of the upper clamping plate 12; a positioning hole for placing the upper reinforcing plate 10 is opened at the same position on the two positioning pieces 21. The two positioning grooves 23 are both arranged on one side close to the clamping midpoint of the two upper clamping plates 12 and are on the same vertical plane. The lower clamping assembly 3 includes a baffle 31 and a baffle 32 arranged on one of the lower clamping plates 14. The baffle 31 and the baffle 32 both extend from the position of one of the lower clamping plates 14 toward the other lower clamping plate 14. The baffle 31 and the baffle 32 are respectively located on both sides of the lower reinforcement plate 20. A placement area for resisting the lower reinforcement plate 20 is formed between the baffle 31 and the baffle 32, and the placement area and the positioning groove 23 are on the same vertical plane.

[0031] The clamping and positioning device of the ceramic fiber tensile testing machine of the present invention is provided with the upper clamping component 2 and the lower clamping component 3. When in use, the operator places the upper reinforcing plate 10 of the ceramic fiber wire in the positioning groove 23 of the positioning plate 21. The upper and lower positioning grooves 23 can position the upper reinforcing plate 10 so that it maintains a vertical and stable state and will not shake. After the upper clamping plate 12 clamps the upper reinforcing plate 10 located in the positioning groove 23, since the positioning groove 23 of the upper clamping component 2 and the placement area of ​​the lower clamping component 3 are on the same vertical plane, at this time, the two sides of the lower reinforcing plate 20 are respectively blocked by the blocking rod 31 and the blocking plate 32 and are not easy to shake. Under the blocking action of the blocking rod 31 and the blocking plate 32, the lower reinforcing plate 20 can be accurately located in the position of the placement area, so that the lower clamping plate 14 is not easily clamped crooked when clamping. This arrangement can effectively ensure the coaxiality of the upper reinforcing plate 10 and the lower reinforcing plate 20.

[0032] Furthermore, the upper clamping arm 11 of the tensile testing machine is provided with a first mounting hole for installing the upper clamping assembly 2 and a first bolt fastener 15 that cooperates with the first mounting hole. The mounting plate 22 is provided with a mounting groove 24 for the first bolt fastener 15 to pass through and be fixed. The first bolt fastener 15 is passed through the mounting groove 24 and locked on the first mounting hole, so that the upper clamping assembly 2 is fixed on the upper clamping arm 11.

[0033] Furthermore, the lower clamping arm 13 of the tensile testing machine is provided with a second mounting hole for installing the lower clamping assembly 3 and a second bolt fastener 16 that cooperates with the second mounting hole. Specifically, the blocking rod 31 in this embodiment is an L-shaped rod, and the lower clamping arm 13 is also provided with a mounting seat 17 for fixing the blocking rod 31. The mounting seat 17 is fixed to the lower clamping arm 13 by the second bolt fastener 16. The mounting seat 17 has a clamping groove and a third bolt fastener 18 for clamping the clamping groove. One end of the blocking rod 31 is a fixing portion 311 that can be inserted into the clamping groove, and the other end of the blocking rod 31 is a blocking portion 312 extending toward the other lower clamping plate 14. After the fixing portion 311 is inserted into the clamping groove, the clamping groove can be clamped by tightening the third bolt fastener 18, thereby fixing the blocking rod 31. When the cam 31 is in the unlocking state, the locking cam 31 is in the unlocking state, and the locking cam 31 is in the unlocking state, so that the cam 31 is locked.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping and positioning device for a ceramic fiber tensile testing machine, characterized in that: The two cams are connected by a pair of locks, and the two cams have the lockhole that is formed on the two cam faces respectively.The two cams have the lockhole that is formed on the two cam faces respectively.

2. The ceramic fiber tensile testing machine clamping and positioning device according to claim 1, characterized in that: The upper clamping arm of the tensile testing machine is provided with a first mounting hole for mounting the upper clamping assembly and a first bolt fastener matched with the first mounting hole, and the mounting plate is provided with a mounting groove for the first bolt fastener to pass through and be fixed.

3. The ceramic fiber tensile testing machine clamping and positioning device according to claim 1, characterized in that: The lower clamping arm of the tensile testing machine is provided with a second mounting hole for mounting the lower clamping assembly and a second bolt fastener cooperating with the second mounting hole, and also includes a mounting seat for fixing the barrier rod, and the mounting seat is fixed on the lower clamping arm by the second bolt fastener.

4. The ceramic fiber tensile testing machine clamping and positioning device according to claim 3, characterized in that: The mounting seat has a clamping groove and a third bolt fastener for clamping the clamping groove. The blocking rod is an L-shaped rod. One end of the blocking rod is a fixed part that can be extended into the clamping groove, and the other end of the blocking rod is a blocking part extending toward the other lower clamping plate. A placement area is formed between the blocking part and the blocking plate.

5. The ceramic fiber tensile testing machine clamping and positioning device according to claim 1, characterized in that: The blocking piece extends from one of the lower clamping plates toward the other lower clamping plate, and the distance between the blocking piece and the blocking rod gradually increases.

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