CN213239790U

CN213239790U - Auxiliary tool for manufacturing composite material nondestructive testing reference block

Info

Publication number: CN213239790U
Application number: CN202021705723.9U
Authority: CN
Inventors: 马刚; 关振; 王一寒
Original assignee: Shenyang Aircraft Industry Group Co Ltd
Current assignee: Shenyang Aircraft Industry Group Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-05-18
Anticipated expiration: 2030-08-17

Abstract

An auxiliary tool for manufacturing a composite material nondestructive testing reference block belongs to the technical field of composite material nondestructive testing. The tool comprises a support, a replaceable impact head, a movable handle, a spring, a screw, a rear cover, a fixed handle and a graduated scale. The fixed handle is of a U-shaped structure, and the bracket is fixed at the top end of the fixed handle; one end of the screw rod is fixed in the bracket, the end head of the other end of the screw rod is a fixed stop block, and the spring is penetrated on the screw rod; the movable handle is in a herringbone structure, two sides of the movable handle are respectively attached to the bracket and the fixed handle, the screw rod and the spring outside the bracket are sleeved in the movable handle, and two ends of the spring are respectively attached to the movable handle and the screw rod end stop block in a free state; the top end of the middle part of the movable handle is connected with a replaceable impact head, and the top end of the impact head slightly protrudes out of the position of the bracket; the position of fixed handle and removal handle laminating has the scale, and the removal handle compresses the spring at the removal in-process, and the elasticity size that produces after scale mark spring compression to a certain position is exactly the size of impact force.

Description

Auxiliary tool for manufacturing composite material nondestructive testing reference block

Technical Field

The utility model belongs to the technical field of combined material nondestructive test, especially, relate to an appurtenance.

Background

The composite material part is limited by the current technical level, the quality discreteness after the forming is large, and therefore one hundred percent nondestructive testing is needed to judge whether defects exist in the part. The usual non-destructive testing method is ultrasonic testing, and pulse echo is used. When the defects of layering, debonding or dense gaps exist in the parts, the bonding quality of the bonding or composite interface is poor, so that the sound pressure reciprocating transmittance of ultrasonic waves is different, and the defect echo or bottom reflection times and amplitude are changed. The ultrasonic detection technology adopts a relative measurement method, so that a reference block is required to be used when the composite material part is subjected to ultrasonic detection. The reference block uses the same raw material as the part, the structure and the thickness of the reference block are equal to those of the part to be detected, and simulation defects with the shape, the position, the size and the precision required according to the use purpose are embedded. In the actual production process, the embedded defects are often not detected or the detected size is smaller than the actual size of the defects, which is usually caused by the good combination quality of the embedded defects and parts and no obvious interface. Under the condition, the reference block cannot meet the requirement of the detection standard, the reference block is often required to be manufactured again, the production period is influenced, the production cost is increased, and the success rate of the reference block cannot be ensured. Under the condition that the composite material part is subjected to low-speed impact force, the conditions of delamination or defect expansion and the like are easily generated in a region with weak interface bonding force, and the defect area can be enlarged by a detection person through a knocking method. However, the surface damage of the part is easily caused when the inspector knocks with a hammer or other tools, and the biggest problem is that the impact strength cannot be quantitatively controlled by manual knocking, or the part is damaged, or the defect area is too large, so that even if the inspection requirement is occasionally met, the success rate of the knocking method cannot be ensured due to the incapability of quantifying when the inspector encounters the same problem next time.

SUMMERY OF THE UTILITY MODEL

The utility model provides an instrument, when the defect detection who buries in the reference block can not come out or detect that the size is less than actual size, can be through the extension of the embedded defect of the induced reference block of mode that the low-speed is strikeed to increase defect area, make it accord with the acceptance standard, thereby improve the qualification rate of reference block.

The technical scheme of the utility model:

the auxiliary tool for the nondestructive testing of the composite material and the manufacture of the reference test block comprises a support 1, a replaceable impact head 2, a movable handle 3, a spring 4, a screw rod 5, a rear cover 6, a fixed handle 7 and a graduated scale 8.

The fixed handle 7 is of a U-shaped structure, and the bracket 1 is fixed at the top ends of two sides of the fixed handle 7 through a bolt structure; one end of the screw rod 5 is fixed in the bracket 1, the end head of the other end is a fixed stop block, and the spring 4 penetrates through the screw rod 5; the movable handle 3 is in a herringbone structure, two sides of the movable handle are respectively attached to the support 1 and the fixed handle 7, the screw 5 part and the spring 4 outside the support 1 are sleeved in the movable handle 3, and two ends of the spring 4 are respectively attached to a stop block of the movable handle 3 and a fixed stop block at the end of the screw 5 in a free state; the top end of the middle part of the E-shaped structure of the movable handle 3 is connected with the replaceable impact head 2, the replaceable impact head 2 is provided with three different specifications of phi 6, phi 8 and phi 11 according to the size of a common defect block, and the top end of the replaceable impact head 2 slightly protrudes out of the position of the bracket 1 so as to ensure effective impact; the position of fixed handle 7 and the laminating of removal handle 3 has scale 8, and removal handle 3 can compress the spring at the removal in-process, and scale 8 has marked the elasticity size that the spring compressed to produce behind a certain position, the size of impulsive force promptly. The inner side of the movable handle 3 is provided with a rear cover 6 which plays a role of protection and decoration, so that the screw rod 5 and the spring 4 are not exposed.

The utility model has the advantages that:

this instrument can be quantitative carry out accurate impact to a certain specific position of reference block to can change different diameters impact head and select the impact force of equidimension not as required, can effectual defect size who enlarges reference block specific position, thereby reduce because of reference block buries defect detection size and is less than the reference block that actual buried size leads to and scrap.

Because different reference test block raw materials and the technological process are different, the tool cannot guarantee one hundred percent success, but for the reference test blocks manufactured by similar raw materials and the technological process, after groping and accumulating certain experience, the tool can greatly improve the success rate of manufacturing the reference test blocks.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1, a bracket; 2, the impact head can be replaced; 3 moving the handle; 4, a spring; 5, a screw rod; 6, covering the rear cover; 7 fixing the handle; 8 graduated scales.

Detailed Description

1. C scanning verification is carried out on the reference block, and the defect position with the area smaller than the qualified size is marked on the reference block.

2. And selecting a corresponding impact head according to the defect size.

3. Holding the fixed handle 7 and slightly pulling the movable handle 3 to enable the impact head to retract to the inner side of the bracket 1, and then attaching the bracket 1 to the surface of a reference block to enable the impact head to be aligned to a position to be impacted.

4. Selecting impact force according to an actual detection result, pulling the movable handle 3 to a corresponding scale position, and loosening the movable handle 3 for impact. It is recommended to choose a smaller impact force to try.

5. And performing nondestructive testing verification again after the impact is finished, and repeating the operation according to the verification result until the verification is qualified.

Claims

1. The auxiliary tool for manufacturing the composite material nondestructive testing reference block is characterized by comprising a support (1), a replaceable impact head (2), a movable handle (3), a spring (4), a screw (5), a rear cover (6), a fixed handle (7) and a scale (8);

the fixed handle (7) is of a U-shaped structure, and the bracket (1) is fixed at the top ends of the two sides of the fixed handle (7) through a bolt structure; one end of the screw rod (5) is fixed in the bracket (1), the end head of the other end is a fixed stop block, and the spring (4) penetrates through the screw rod (5); the movable handle (3) is in a structure like a Chinese character 'shan', two sides of the movable handle are respectively attached to the support (1) and the fixed handle (7), the screw rod (5) outside the support (1) and the spring (4) are sleeved in the movable handle (3), and two ends of the spring (4) are respectively attached to a stop block of the movable handle (3) and a fixed stop block at the end of the screw rod (5) in a free state; the top end of the middle part of the E-shaped structure of the movable handle (3) is connected with the replaceable impact head (2), the replaceable impact head (2) is provided with three different specifications of phi 6, phi 8 and phi 11 according to the size of a common defect block, and the top end of the replaceable impact head (2) slightly protrudes out of the position of the bracket (1) so as to ensure effective impact; a scale ruler (8) is arranged at the joint position of the fixed handle (7) and the movable handle (3), the movable handle (3) can compress the spring in the moving process, and the scale ruler (8) marks the elastic force generated after the spring is compressed to a certain position, namely the impact force; the inner side of the movable handle (3) is provided with a rear cover (6) which plays a role of protection and decoration, so that the screw rod (5) and the spring (4) are not exposed.