CN220863940U - Composite material encapsulation type pressure loss test piece fixing tool - Google Patents

Abstract

The utility model belongs to the technical field of composite material tests, and discloses a composite material potting type compression loss test piece fixing tool which comprises a base, a guide base and two movable platforms. The guide base is arranged on the base and extends along a first direction; the two movable platforms are arranged on the guide base and can be relatively close to or far away from each other along the first direction; each movable platform comprises a bottom plate, a fixed limiting assembly and a movable limiting assembly. The bottom plate is arranged on the guide base; the fixed limiting component is arranged at one end of the bottom plate and used for fixing one side wall of the test piece between the fixed limiting component and the bottom plate; the movable limiting component is arranged on the bottom plate and used for fixing the other side wall of the test piece between the movable limiting component and the bottom plate, and the position of the movable limiting component along the second direction is adjustable. The composite material encapsulation type pressure loss test piece fixing tool is high in universality, and can reliably clamp the encapsulation end of a test piece, so that the processing precision is improved.

Description

Composite material encapsulation type pressure loss test piece fixing tool

Technical Field

The utility model relates to the technical field of composite material tests, in particular to a composite material potting type pressure loss test piece fixing tool.

Background

Before the composite material test piece is subjected to pressure loss mechanical strength test, the two ends of the composite material test piece are required to be encapsulated and bonded with the metal corner box through epoxy resin, so that the end structure is reinforced to ensure that an effective damage mode is generated in the test process. However, the pressure loss mechanical test has higher size requirement on the composite material test piece, and bending damage caused by eccentricity can not occur during the pressure loss mechanical test only when the parallelism of the metal corner box end surfaces on two sides of the composite material test piece after encapsulation and adhesion and the perpendicularity compound requirement of the metal corner box end surfaces and the bottom plate surface of the composite material test piece are required.

If the composite material test piece is ensured to meet the test requirement through one-time encapsulation molding, an encapsulation tool with accurate positioning needs to be put into, the research and development period is long, and the cost is high. Therefore, further machining is generally performed after the composite test piece is encapsulated and molded, so that the size of the composite test piece meets the test requirements. At present, when the composite material test piece formed by encapsulation is mechanically processed, a specific clamp is required to be used for fixing the composite material test piece, but the existing clamp is required to be specially customized according to the size of the composite material test piece formed by encapsulation, the universality is poor, and after the composite material test piece is fixed by the existing clamp, the problem that the suspension length of the encapsulation end of the composite material test piece is long can occur, so that the processing precision is affected.

Therefore, it is needed to provide a fixture for fixing composite potting type compression loss test pieces, so as to solve the above problems.

Disclosure of utility model

The utility model provides a composite material encapsulation type compression loss test piece fixing tool which can be suitable for fixing test pieces with various sizes, has higher universality, can reliably clamp the encapsulation end of the test piece, and is beneficial to improving the processing precision.

To achieve the purpose, the utility model adopts the following technical scheme:

composite material embedment class pressure loss test piece fixed frock for fixed composite material embedment class pressure loss test piece, composite material embedment class pressure loss test piece includes the test piece and is located the metal angle box at test piece both ends, composite material embedment class pressure loss test piece fixed frock includes:

The base is used for being connected with the processing platform;

The guide base is arranged on the base and extends along a first direction;

the two movable platforms are arranged on the guide base and can be relatively close to or far away from each other along the first direction; each movable platform comprises:

the bottom plate is arranged on the guide base in a sliding manner, and the bottom surface of the test piece is attached to the bottom plate;

The fixed limiting assembly is arranged at one end of the bottom plate and used for fixing one side wall of the test piece between the fixed limiting assembly and the bottom plate;

The movable limiting assembly is arranged on the bottom plate and is used for fixing the other side wall of the test piece between the movable limiting assembly and the bottom plate, the position of the movable limiting assembly along a second direction is adjustable, and the second direction is perpendicular to the first direction.

Optionally, the distance between the metal corner box and the base plate adjacent thereto is less than 10mm.

Optionally, the guide base is followed be equipped with on two opposite lateral walls of second direction along the spacing groove that extends of first direction, the fixed frock of combined material embedment class pressure loss test piece still includes:

the top of the connecting block is fixedly connected with the bottom plate, and the bottom of the connecting block is attached to the top of the guide base;

The two clamping arms are respectively arranged on two sides of the connecting block along the second direction, each clamping arm comprises a clamping section and a first connecting section, the clamping sections are inserted into the corresponding limiting grooves, the first bolts penetrate through the first connecting sections and are in threaded connection with the connecting block, and the two clamping arms can be clamped on the guide base by tightening the first bolts.

Optionally, each of the clamping arms is shaped like an "L".

Optionally, a first rack extending along the first direction is arranged at the top of the guide base, a second rack is arranged at the bottom of the connecting block, and the second rack is meshed with the first rack.

Optionally, the fixed stop assembly includes:

the limiting boss is arranged at one end of the bottom plate and is used for being abutted with the side face of the side wall of the test piece;

the first pressing plate comprises a second connecting section and a pressing section, the second bolt penetrates through the second connecting section to be in threaded connection with the limiting boss, and the second bolt is screwed down, so that the pressing section can be pressed against the top surface of the side wall of the test piece.

Optionally, the bottom plate is provided with a strip-shaped hole extending along the second direction;

The third bolt penetrates through the strip-shaped hole and is in threaded connection with the movable limiting assembly; or the third bolt passes through the strip-shaped hole and is in threaded connection with the first nut.

Optionally, the movable limiting assembly includes:

The connecting plate comprises a third connecting section, a limiting section and a fourth connecting section, wherein the third connecting section is connected with the bottom plate, and the limiting section is used for being abutted with the side face of the side wall of the test piece;

And the second pressing plate is connected with the fourth connecting section, and the position of the second pressing plate along the vertical direction is adjustable so as to be propped against the top surface of the side wall of the test piece.

Optionally, a threaded hole is formed in the fourth connecting section, the fourth bolt is in threaded connection with the threaded hole, and the fourth bolt is screwed, so that the fourth bolt can push the second pressing plate to be pressed against the top surface of the side wall of the test piece.

Optionally, a plurality of connecting holes are formed in the base, and the base is connected with the processing platform through part of the connecting holes.

The utility model has the beneficial effects that:

The utility model provides a composite material potting type compression loss test piece fixing tool which comprises a base, a guide base and two movable platforms. When the composite material encapsulation type pressure loss test piece is fixed, the test piece is placed on the two movable platforms, and then the distance between the two movable platforms is adjusted, so that the two movable platforms can reliably support the encapsulation end of the test piece. After the distance between the two movable platforms is adjusted, the positions of the movable limiting components of the movable platforms are adjusted, so that the fixed limiting components and the movable limiting components can fix the test piece, and the fixing of the composite material potting type pressure loss test piece can be completed. This fixed frock of combined material pressure loss test piece can be close to relatively or keep away from through setting up two movable platforms, can reliably support the embedment end of test piece, is favorable to improving machining precision, also can be applicable to the test piece of different length. Through setting up the adjustable position of activity spacing subassembly, can be applicable to the test piece that the width is different, the universality is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram (showing a cutter) of a composite material encapsulation type pressure loss test piece fixing tool and an assembly diagram of a composite material encapsulation type pressure loss test piece provided by an embodiment of the utility model;

Fig. 2 is a top view of an assembly diagram of a composite potting type pressure loss test piece fixing tool and a composite potting type pressure loss test piece provided by an embodiment of the utility model;

Fig. 3 is a schematic structural diagram of a composite potting type pressure loss test piece fixing tool according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a movable platform at a view angle according to an embodiment of the present utility model;

Fig. 5 is a schematic structural diagram of a movable platform according to another view angle provided by an embodiment of the present utility model.

In the figure:

1. A cutter;

10. a test piece; 20. A metal corner box;

100. a base; 110. A connection hole;

200. A guide base; 210. A limit groove; 220. A first rack;

300. a movable platform; 310. a bottom plate; 311. a strip-shaped hole; 312. a third bolt; 320. fixing a limiting assembly; 321. a limit boss; 322. a first platen; 3221. a second connection section; 3222. a pressing section; 323. a second bolt; 330. a movable limit component; 331. a connecting plate; 3311. a third connecting section; 3312. a limiting section; 3313. a fourth connecting section; 332. a second pressing plate; 333. a fourth bolt;

400. a connecting block; 410. a second rack;

500. a clamp arm; 510. a clamping section; 520. a first connection section; 530. a first bolt.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 and 2, the composite material potting type pressure loss test piece comprises a test piece 10 and metal corner boxes 20 arranged at two ends of the test piece 10, wherein the metal corner boxes 20 are connected with the test piece 10 in a potting mode.

After the composite material potting type pressure loss test piece is manufactured, the parallelism between the two metal corner boxes 20 and the perpendicularity between the metal corner boxes 20 and the test piece 10 are difficult to meet the requirement of the pressure loss mechanical test, so that the metal corner boxes 20 are required to be further processed. In machining the metal corner box 20, it is necessary to fix the composite potting type pressure loss test piece using a jig. At present, the existing clamp needs to be specially customized according to the size of the test piece 10, the universality is poor, and after the existing clamp is fixed with the test piece 10, the problem that the suspension length of the filling and sealing end of the test piece 10 is long can occur, so that the processing precision is affected.

Based on the above-mentioned problem, this embodiment provides a fixed frock of combined material embedment class pressure loss test piece, can be applicable to the fixed of test piece 10 of multiple size, and the universality is higher to the embedment end of test piece 10 can reliably be held, machining precision is favorable to improving.

Specifically, with continued reference to fig. 1 and 2, the composite potting-type compression loss test piece fixing tool includes a base 100, a guide base 200, and two movable platforms 300. The base 100 is used for being connected with a processing platform for processing the metal corner box 20, so that the whole composite material encapsulation type pressure loss test piece fixing tool is fixed. The guide base 200 is disposed on the base 100 and extends in a first direction (a direction indicated by an arrow in fig. 1). The movable platform 300 is used for bearing and fixing the test piece 10, two movable platforms 300 are all arranged on the guide base 200, and the two movable platforms 300 can be relatively close to or far away from each other along the first direction, and the two movable platforms 300 can reliably support the test pieces 10 with different length sizes by adjusting the distance between the two movable platforms 300 along the first direction, so that the problem that the processing precision is low due to the fact that the potting ends of the test pieces 10 are too long in the air is avoided, and the universality of the composite material potting type pressure loss test piece fixing tool can be improved.

In the present embodiment, the movable platform 300 includes a base plate 310, a fixed limiting assembly 320, and a movable limiting assembly 330. Wherein, bottom plate 310 slides and sets up on guide base 200, and the bottom surface subsides of test piece 10 are located bottom plate 310, through guaranteeing the planarization of bottom plate 310, can guarantee the levelness that test piece 10 placed. The fixed limiting component 320 is disposed at one end of the bottom plate 310, and is used for fixing one side wall of the test piece 10 between the fixed limiting component 320 and the bottom plate 310; the movable limiting component 330 is arranged on the bottom plate 310, the movable limiting component 330 is used for fixing the other side wall of the test piece 10 between the movable limiting component 330 and the bottom plate 310, and the two opposite ends of the width direction of the test piece 10 can be fixed through the fixed limiting component 320 and the movable limiting component 330, so that the purpose of fixing the test piece 10 is achieved. And, the position of the movable limiting assembly 330 along the second direction is adjustable, and the second direction is perpendicular to the first direction, so that the movable platform 300 can be suitable for the test pieces 10 with different width dimensions, and the universality of the composite material potting type pressure loss test pieces is improved.

Further, as shown in fig. 2, in order to ensure that the movable platform 300 can firmly clamp and fix the test piece 10, the influence on the processing precision of the metal corner box 20 caused by the shake of the suspended and overlong potting end of the test piece 10 in the processing process of the metal corner box 20 is avoided, and when the position of the movable platform 300 is adjusted, the distance a between the metal corner box 20 and the adjacent bottom plate 310 is ensured to be smaller than 10mm.

Further, as shown in fig. 3 to 5, the fixture for fixing the composite potting type compression loss test piece further comprises a connecting block 400 and two clamping arms 500. Wherein, the top of the connecting block 400 is fixedly connected with the bottom plate 310, and the bottom of the connecting block 400 is attached to the top of the guide base 200. The two opposite side walls of the guide base 200 along the second direction are provided with limiting grooves 210 extending along the first direction, and the two clamping arms 500 are respectively arranged at two sides of the connecting block 400 along the second direction, that is, the two clamping arms 500 are respectively opposite to the two limiting grooves 210. Each clamping arm 500 includes a clamping section 510 and a first connecting section 520, the clamping section 510 is inserted into the corresponding limiting groove 210, the first bolt 530 passes through the first connecting section 520 to be in threaded connection with the connecting block 400, and the two clamping arms 500 can clamp the guide base 200 by tightening the first bolt 530.

When the position of the movable platform 300 needs to be adjusted, that is, the position of the bottom plate 310 needs to be adjusted, the first bolt 530 is loosened slightly to the connecting block 400 to move, and then the connecting block 400 is pushed to slide on the guiding base 200, at this time, the clamping section 510 slides in the limiting groove 210, so that the sliding direction of the connecting block 400 can be guided by the limiting groove 210. After the sliding to the required position, the first bolt 530 is tightened again, and the two clamping sections 510 of the two clamping arms 500 clamp the guide base 200 along the second direction, so that the fixing of the connecting block 400 is realized, and the connecting block 400 is fixedly connected with the bottom plate 310, so that the bottom plate 310 is also fixed, and further, the fixing of the movable platform 300 is realized.

The position of the movable platform 300 is adjusted and locked through the connecting block 400 and the clamping arm 500, and the movable platform is simple in structure, low in cost and convenient to operate.

Alternatively, in the present embodiment, the connection block 400 is a rectangular block, and each clip arm 500 has an "L" -like shape. In other embodiments, the shapes of the connection block 400 and the clip arm 500 may be other, and may be set according to actual needs, which is not particularly limited.

Preferably, with continued reference to fig. 3 and 5, the top of the guide base 200 is provided with a first rack 220 extending in a first direction, and the bottom of the connection block 400 is provided with a second rack 410, the second rack 410 being engaged with the first rack 220. Through the cooperation of the first rack 220 and the second rack 410, the auxiliary clamping arm 500 fixes the connecting block 400, so that the risk of moving the connecting block 400 in the processing process is reduced, namely, the reliability of locking work of the bottom plate 310 is improved, and further, the processing precision of the metal corner box 20 is improved.

Alternatively, in the present embodiment, two guide bases 200 are provided, and two guide bases 200 are disposed at intervals in the second direction. Through setting up two guide base 200, can support the both ends of bottom plate 310, improve the homogeneity of bottom plate 310 atress, be favorable to reinforcing bottom plate 310 intensity to and improve the stability to test piece 10 is fixed.

Further, in the present embodiment, two second racks 410 are disposed on each guide base 200 at intervals, and correspondingly, two first racks 220 are disposed on each connecting block 400, and each first rack 220 is engaged with one second rack 410, so that the limiting effect is better. In other embodiments, only one second rack 410 may be disposed on each guide base 200, and one first rack 220 may be disposed on each connecting block 400, which is not particularly limited according to practical needs.

Further, with continued reference to fig. 3-5, the fixed stop assembly 320 includes a stop boss 321 and a first pressure plate 322.

The limiting boss 321 is disposed at one end of the bottom plate 310, and the limiting boss 321 is used for abutting against a side surface of the side wall of the test piece 10. Alternatively, the limiting boss 321 may be integrally formed with the bottom plate 310, or may be separately formed with the bottom plate 310.

The first pressing plate 322 includes a second connecting section 3221 and a pressing section 3222, the second bolt 323 passes through the second connecting section 3221 and is in threaded connection with the limiting boss 321, and the second bolt 323 is screwed down, so that the pressing section 3222 can be pressed against the top surface of the side wall of the test piece 10.

Before the test piece 10 is installed, the second bolt 323 is loosened, so that the distance between the pressing section 3222 and the bottom plate 310 is relatively large, and the test piece 10 is convenient to install. When the test piece 10 is mounted, the test piece 10 is placed on the bottom plate 310, and then the test piece 10 is pushed to move along the second direction towards the direction close to the limiting boss 321 until the side surface of the side wall of the test piece 10 is abutted against the limiting boss 321. At this time, the pressing section 3222 is located at the upper portion of the top surface of the side wall of the test piece 10, and finally the second bolt 323 is tightened to make the first pressing plate 322 sink until the pressing section 3222 of the first pressing plate 322 and the bottom plate 310 can clamp the side wall of the test piece 10.

The fixed limiting component 320 provided in this embodiment has a simple structure, low cost, convenient operation and good fixing effect.

Alternatively, one or a plurality of second bolts 323 may be provided, and the present application is not limited to the specific one. In the present embodiment, two second bolts 323 are provided.

Alternatively, in the present embodiment, the second connecting section 3221 and the pressing section 3222 are perpendicular.

Further, in one embodiment, with continued reference to fig. 3 and 4, the base plate 310 is provided with an elongated aperture 311 extending in the second direction. The third bolt 312 passes through the elongated hole 311 and is in threaded connection with the movable limiting assembly 330. When the position of the movable limiting assembly 330 needs to be adjusted, the third bolt 312 is unscrewed, the movable limiting assembly 330 is pushed to move to the required position along the direction of the elongated hole 311, and then the third bolt 312 is screwed, so that the structure is simple, and the adjustment is convenient.

Alternatively, the third bolts 312 may be provided in one or more number, according to actual needs. In the present embodiment, the third bolts 312 are provided in two.

It will be appreciated that in other embodiments, the third bolt 312 may be threaded through the elongated hole 311 and connected to the first nut, as required.

Further, with continued reference to fig. 3 and 4, the movable stop assembly 330 includes a connecting plate 331 and a second pressure plate 332.

The connecting plate 331 includes a third connecting section 3311, a limiting section 3312 and a fourth connecting section 3313, wherein the third connecting section 3311 is connected to the bottom plate 310, and in this embodiment, the third bolt 312 is screwed to the bottom plate 310 through the long bar-shaped hole 311. The limiting section 3312 is adapted to abut against a side surface of the side wall of the test piece 10.

The second pressing plate 332 is connected to the fourth connecting section 3313, and the position of the second pressing plate 332 in the vertical direction is adjustable to press against the top surface of the side wall of the test piece 10.

The distance between the second pressing plate 332 and the bottom plate 310 is made larger before the test piece 10 is mounted. After one side wall of the test piece 10 is fixed by the fixed limiting assembly 320, the third bolt 312 is loosened, and the connecting plate 331 is pushed to move along the second direction towards the direction close to the test piece 10 until the limiting section 3312 abuts against the side surface of the side wall of the test piece 10. Thereafter, the position of the second pressing plate 332 is adjusted until the second pressing plate 332 and the bottom plate 310 clamp and fix the side wall of the test piece 10.

The movable limiting component 330 provided by the embodiment has the advantages of simple structure, lower cost, convenient operation and better fixing effect.

Alternatively, with continued reference to fig. 4, in this embodiment, the connection plate 331 has a "Z" shape. The third connecting section 3311 and the fourth connecting section 3313 may be formed by bending both ends of the limiting section 3312, which is convenient for processing.

Optionally, a threaded hole is formed on the fourth connecting section 3313, the fourth bolt 333 is screwed to the threaded hole, and the fourth bolt 333 is screwed to enable the fourth bolt 333 to push the second pressing plate 332 to press against the top surface of the side wall of the test piece 10.

It can be understood that the second pressing plate 332 may be slidably connected to the limiting section 3312, or may be directly placed on the test piece 10, and opposite to the fourth bolt 333, by screwing the fourth bolt 333, the fourth bolt 333 may be lowered in the setting direction to abut against the second pressing plate 332, and then continuing to screw the fourth bolt 333, so that the second pressing plate 332 and the bottom plate 310 clamp and fix the side wall of the test piece 10. The second pressing plate 332 is used for pressing the test piece 10, and compared with the fourth bolt 333 which is used for directly pressing the test piece 10, the stress area of the test piece 10 is increased, and the test piece 10 is protected.

Further, with continued reference to fig. 3, the base 100 is provided with a plurality of connection holes 110, and the base 100 is connected to the processing platform through a portion of the connection holes 110, and illustratively, each of a plurality of fifth bolts (not shown) is selectively connected to the processing platform through one of the connection holes 110. Through setting up a plurality of connecting holes 110, can change the position of base 100 as required to make the distance between the metal angle box 20 of not unidimensional test piece 10 and the cutter 1 the same, and then guarantee machining precision, make the fixed frock of above-mentioned combined material embedment class pressure loss test piece can be applicable to various processing platforms, the universality is higher.

Optionally, in this embodiment, the plurality of connection holes 110 are arranged in an array on the base 100, which is convenient for processing and is attractive. In other embodiments, the arrangement of the plurality of connection holes 110 may be other, and may be set according to actual needs, which is not particularly limited.

The process for processing the composite material encapsulation type pressure loss test piece by adopting the composite material encapsulation type pressure loss test piece fixing tool is as follows:

Fixing the base 100 on a processing platform, determining the position between the composite material potting type pressure loss test piece fixing tool and the cutter 1 of the processing center, and using the limiting boss 321 as a reference to be parallel to the X axis of the processing center;

Fixing the composite material encapsulation type pressure loss test piece on the composite material encapsulation type pressure loss test piece fixing tool;

The end face of the metal corner box 20 on one side of the test piece 10 is processed by using the cutter 1, so that the parallelism of the metal corner boxes 20 on two sides and the perpendicularity between the metal corner box 20 and the bottom plate 310 meet the design requirements.

The limiting boss 321 is parallel to the X axis of the machining center, so that the repeated tool setting process is not needed after the composite material encapsulation type pressure loss test piece is replaced, and the machining time is saved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Composite material embedment class pressure loss test piece fixed frock for fixed composite material embedment class pressure loss test piece, composite material embedment class pressure loss test piece includes test piece (10) and is located metal angle box (20) at test piece (10) both ends, its characterized in that, composite material embedment class pressure loss test piece fixed frock includes:

a base (100) for connection to a processing platform;

A guide base (200) provided on the base (100), the guide base (200) extending in a first direction;

Two movable platforms (300) are arranged on the guide base (200), and the two movable platforms (300) can be relatively close to or far away from each other along the first direction; each of the movable platforms (300) includes:

A bottom plate (310) which is arranged on the guide base (200) in a sliding manner, wherein the bottom surface of the test piece (10) is attached to the bottom plate (310);

The fixed limiting assembly (320) is arranged at one end of the bottom plate (310) and is used for fixing one side wall of the test piece (10) between the fixed limiting assembly (320) and the bottom plate (310);

The movable limiting assembly (330) is arranged on the bottom plate (310), the movable limiting assembly (330) is used for fixing the other side wall of the test piece (10) between the movable limiting assembly (330) and the bottom plate (310), the position of the movable limiting assembly (330) along a second direction is adjustable, and the second direction is perpendicular to the first direction.

2. The composite potting type pressure loss test piece fixing tool according to claim 1, wherein a distance between the metal corner box (20) and the bottom plate (310) adjacent to the metal corner box is smaller than 10mm.

3. The composite potting type pressure loss test piece fixing tool according to claim 1, wherein two opposite side walls of the guide base (200) along the second direction are provided with limiting grooves (210) extending along the first direction, and the composite potting type pressure loss test piece fixing tool further comprises:

The top of the connecting block (400) is fixedly connected with the bottom plate (310), and the bottom of the connecting block (400) is attached to the top of the guide base (200);

Two arm clamps (500), follow the second direction sets up respectively the both sides of connecting block (400), every arm clamps (500) all include grip block (510) and first linkage segment (520), grip block (510) peg graft in rather than corresponding spacing groove (210), first bolt (530) pass first linkage segment (520) with connecting block (400) threaded connection, through tightening first bolt (530), can make two arm clamps (500) clamp guide base (200).

4. A composite potting type pressure loss test fixture according to claim 3, wherein each of the clamping arms (500) is "L" -shaped.

5. The composite potting type pressure loss test piece fixing tool according to claim 3, wherein a first rack (220) extending along the first direction is arranged at the top of the guide base (200), a second rack (410) is arranged at the bottom of the connecting block (400), and the second rack (410) is meshed with the first rack (220).

6. The composite potting type pressure loss test piece fixing tool according to claim 1, wherein the fixing and limiting assembly (320) comprises:

The limiting boss (321) is arranged at one end of the bottom plate (310), and the limiting boss (321) is used for being abutted with the side face of the side wall of the test piece (10);

The first pressing plate (322) comprises a second connecting section (3221) and a pressing section (3222), a second bolt (323) penetrates through the second connecting section (3221) to be in threaded connection with the limiting boss (321), the second bolt (323) is screwed down, and the pressing section (3222) can be pressed against the top surface of the side wall of the test piece (10).

7. The composite potting type pressure loss test piece fixing tool according to any one of claims 1 to 6, wherein the bottom plate (310) is provided with an elongated hole (311) extending along the second direction;

The third bolt (312) passes through the strip-shaped hole (311) and is in threaded connection with the movable limiting assembly (330); or, the third bolt (312) passes through the long strip-shaped hole (311) to be in threaded connection with the first nut.

8. The composite potting type pressure loss test piece fixing tool according to any one of claims 1 to 6, wherein the movable limiting assembly (330) comprises:

The connecting plate (331) comprises a third connecting section (3311), a limiting section (3312) and a fourth connecting section (3313), wherein the third connecting section (3311) is connected with the bottom plate (310), and the limiting section (3312) is used for being abutted to the side face of the side wall of the test piece (10);

And the second pressing plate (332) is connected with the fourth connecting section (3313), and the position of the second pressing plate (332) along the vertical direction is adjustable so as to be propped against the top surface of the side wall of the test piece (10).

9. The fixture for fixing the composite potting type pressure loss test piece according to claim 8, wherein a threaded hole is formed in the fourth connecting section (3313), a fourth bolt (333) is in threaded connection with the threaded hole, and the fourth bolt (333) is screwed, so that the fourth bolt (333) can push the second pressing plate (332) to press against the top surface of the side wall of the test piece (10).

10. The composite potting type pressure loss test piece fixing tool according to any one of claims 1 to 6, wherein a plurality of connecting holes (110) are formed in the base (100), and the base (100) is connected with the processing platform through part of the connecting holes (110).