CN204575430U - A kind of space flight parts peculiar indentation test machine - Google Patents

Abstract

The utility model relates to an indentation testing machine for aerospace special parts, which belongs to the field of material testing machines. The upper beam, the column and the lower beam are fixed by nuts to form a gantry load frame. The lower beam is fixedly connected to the electric control box through anchor bolts, and the electric cylinder is connected to the upper beam by screws. The upper pressure in the centering compression fixture The block is fixedly connected with the moving beam, the lower pressure block in the centering compression fixture is fixedly connected with the connecting rod, the return spring is set on the column, the pressure sensor is fixed on the lower beam through the lock nut and the connecting rod, and the guide copper sleeve and the moving beam Fixed connection, the electric cylinder is fixedly connected with the upper beam. The advantages are: the structure is novel, and the centering compression fixture is used to ensure the centering accuracy of the upper and lower pressure heads. It is equipped with a gantry loading frame, an electric cylinder pressurization system and an electric control system. The main frame is an integral gantry load frame with good rigidity and The performance is stable, the electric cylinder is loaded, and the loading system is compact and simple.

Description

An indentation testing machine for aerospace parts

technical field

The utility model belongs to the field of material testing machines, in particular to an electronic indentation testing machine for compressing aerospace special parts to improve their mechanical properties.

Background technique

The testing machine is the basic test equipment for studying the mechanical properties of aerospace parts. During the compression test, the upper and lower indenters are required to be accurately centered. The stress value of the compressed part of the aerospace parts reaches 1000MPa. When the deformation of the workpiece reaches the required value, it will automatically stop. After the workpiece is squeezed, indentations appear on the upper and lower surfaces, and the mechanical properties of the material at the compressed place change to meet the requirements of the aerospace field. The centering accuracy of the upper and lower indenters of ordinary pressure testing machines is low, and the yield strength of ordinary indenter materials cannot meet the requirements, which cannot meet the test requirements of this special part. Therefore, it is necessary to develop a testing machine that can strictly guarantee the centering accuracy of the upper and lower indenters, and the yield strength of the indenter material is extremely high.

Contents of the invention

The utility model provides an indentation testing machine for aerospace special parts to solve the problem that the centering precision and the yield strength of an indenter do not meet the test standard of the existing common pressure testing machine.

The technical solution of the utility model is: the upper beam is fixed with the column and the lower beam through nuts to form a door-type load frame, the lower beam is fixedly connected with the electric control box through anchor bolts, and the electric cylinder is connected to the upper beam through screws. The upper pressure block in the centering compression fixture is fixedly connected to the moving beam, the lower pressure block in the centering compression fixture is fixedly connected to the connecting rod, the return spring is set on the column, and the pressure sensor is fixed to the lower beam through the lock nut and the connecting rod On the top, the guide copper sleeve is fixedly connected with the moving beam, and the electric cylinder is fixedly connected with the upper beam;

The structure of the centering compression fixture is: the positioning pin is fixedly connected with the lower pressing block, the upper pressing block is slidingly connected with the positioning pin, and the two pressure heads are respectively crimped with the two adapter blocks, and respectively close to the upper pressing block and the positioning pin. The surface on the right side of the lower pressing block is integrally cut by wire cutting, the pressing block is crimped with the transfer block, the pressing block is fixedly connected with the upper pressing block and the lower pressing block respectively by bolts, and the workpiece support spring is placed on the lower pressing block .

The indenter adopts YT15 hard alloy;

The adapter block is made of cemented carbide.

The utility model has the advantages of novel structure, adopting a centering compression fixture to ensure the centering accuracy of the upper and lower indenters, the indenter material adopts YT15 hard alloy with a yield strength of 3900MPa, and is equipped with a door-type loading frame, an electric cylinder pressurization system and Electric control system, the host frame is an integral portal load rack with good rigidity and stable performance, the electric cylinder is loaded, and the loading system is compact and simple.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a part composition diagram of the host computer of the present utility model;

Fig. 3 is a schematic structural view of the centering compression fixture of the present invention;

Fig. 4 is a left view of the centering compression fixture of the present invention;

Figure 5 is a schematic diagram of the force on the workpiece during the test of the utility model. The upper and lower indenters are precisely centered, so that the indentation of the workpiece occurs and the specified deformation is achieved, so that the mechanical properties of the material at the pressurized place meet the use requirements.

Detailed ways

The upper beam 3, the column 4, and the lower beam 7 are fixed by nuts to form a gantry load rack. The lower beam 7 is fixedly connected to the electric control box 2 through the anchor bolt 1, and the electric cylinder 12 is connected to the upper beam 3 by screws. The upper pressing block 501 in the centering compression fixture 5 is fixedly connected with the moving beam 11, the lower pressing block 504 in the centering compression fixture 5 is fixedly connected with the connecting rod 9, the return spring 6 is set on the column 4, and the pressure sensor 8 passes through the lock The tightening nut and connecting rod 9 are fixed on the lower beam 7, the guide copper sleeve 10 is fixedly connected with the moving beam 11, and the electric cylinder 12 is fixedly connected with the upper beam 3;

The structure of the centering compression fixture 5 is: the positioning pin 502 is fixedly connected with the lower pressing block 504, the upper pressing block 501 is slidingly connected with the positioning pin 502, and the two pressing heads 506 are crimped with the two adapter blocks 505 respectively, and Respectively close to the surface of the upper pressing block 501 and the right side of the lower pressing block 504 through wire cutting, the pressing block 503 is crimped with the adapter block 505, and the pressing block 503 is respectively connected to the upper pressing block and the lower pressing block through bolts 507. The pressing block is fixedly connected, and the workpiece support spring 508 is placed on the lower pressing block 504 .

The indenter adopts YT15 hard alloy;

The adapter block is made of cemented carbide.

The upper and lower pressure blocks in the centering compression fixture are initially a part. After the positioning pin hole and the assembly pressure head are processed, they are cut from the middle, which ensures that when the upper and lower positioning pin holes are aligned, the upper and lower pressure heads are also accurately aligned. ; After cutting, the positioning pin is pressed into the lower pressing block, and the positioning pin hole of the upper pressing block is reamed, so that it becomes a clearance fit with the positioning pin. When the upper pressing block is raised, the locating pin has enough travel and does not leave the upper pressing block, so that the positioning pin does not need to penetrate the upper pressing block during each compression test, and the workpiece can be taken out from the gap in the middle after the upper pressing block is raised . The indenter is made of YT15 cemented carbide, the yield strength of the material is extremely high. The rear end of the cemented carbide indenter presses a large-area cemented carbide transfer block, and then the transfer block 505 applies the pressure to the upper and lower press blocks to reduce the upper and lower pressure. The force per unit area during the briquetting test.

Working principle: Put the workpiece to be tested on the lower pressing block through the workpiece support spring 20, and use the electric cylinder to load, the electric cylinder 12 presses the moving beam 11 to slide along the column 4, and the upper and lower indenters are accurately centered, so that the workpiece is indented and reaches the specified The amount of deformation, so that the mechanical properties of the material under pressure meet the requirements of use.

Claims (4)

1. a space flight parts peculiar indentation test machine, it is characterized in that: entablature and column, sill is fixed by nut, common composition gate-type load frame, sill is fixedly connected with electric cabinet by foot bolt, electric cylinder is connected by screw on entablature, upper holder block in centering compression clamp is fixedly connected with moving beam, lower lock block in centering compression clamp is fixedly connected with connecting link, back-moving spring is enclosed within column, pressure transducer passes through set nut, connecting link is fixed on sill, guide copper sleeve is fixedly connected with moving beam, electric cylinder is fixedly connected with entablature.

2. a kind of space flight parts peculiar indentation test machine according to claim 1, it is characterized in that: the structure of described centering compression clamp is: register pin is fixedly connected with lower lock block, upper holder block and register pin are slidably connected, two pressure heads are crimped with two transfer blocks respectively and are close on the face of integrally being cut out by Linear cut on the right side of upper holder block and lower lock block respectively, compact heap crimps with transfer block, compact heap is fixedly connected with upper holder block, lower lock block respectively by bolt, and workpiece support spring is placed on lower lock block.

3. a kind of space flight parts peculiar indentation test machine according to claim 2, is characterized in that: described pressure head adopts YT15 wimet.

4. a kind of space flight parts peculiar indentation test machine according to claim 2, is characterized in that: described transfer block adopts wimet.