Flaw detection equipment for sand mold casting part

Abstract

Flaw detection equipment for sand casting parts relates to the technical field of sand casting part detection equipment and comprises a base, two longitudinal guide rails are mounted on two sides of the upper end face of the base through supporting frames, longitudinal electric sliding blocks are slidably mounted on the outer portions of the longitudinal guide rails, and a transverse guide rail is fixedly mounted between the two longitudinal electric sliding blocks; a transverse electric sliding block is slidably mounted outside the transverse guide rail, an electric push rod is mounted below the transverse electric sliding block, a mounting head is mounted at the bottom of the electric push rod, an ultrasonic probe is mounted below the mounting head, and a positioning table is arranged on the front side of the upper end face of the base; by means of the scheme, the problems that flaw detection equipment cannot rapidly achieve comprehensive detection, and relative displacement of the casting and the probe is prone to occurring in the detection process are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sand casting part detection equipment technical field, specifically is a kind of flaw detection equipment for sand casting part. BACKGROUND

[0002] Sand casting part flaw detection is of great significance, it passes through to adopt various flaw detection technology and equipment, such as ultrasonic wave, ray, magnetic powder, penetration flaw detection etc., according to the specific situation of casting part, select adaptive mode, according to regulation operation to detect its inside and surface condition. Flaw detection can accurately identify defects such as porosity, sand eye, crack, and finally dispose casting part according to flaw detection conclusion, including scrap, repair or downgraded use etc.

[0003] For example, the Chinese authorized patent "metal casting flaw detection device" with announcement number CN218691895U includes a support rod, an automatic telescopic rod is installed at the top of the support rod, and an outer frame is fixedly connected to the top of the automatic telescopic rod, a flaw detection instrument is installed on one side of the outer frame, an installation frame is arranged in the inner cavity of the outer frame, a motor is installed on one side of the outer frame, a lead screw penetrating through the outer frame is drivingly connected to one end of the motor, one end of the lead screw is rotatably connected to the inner wall of one side of the outer frame, a screw sleeve is sleeved on the outer ring of the lead screw, the bottom of the installation frame on the other side of the outer ring of the screw sleeve is fixedly connected to the adjacent installation frame, the bottom of the installation frame on the other side is slidingly connected to the inner side wall of the outer frame, and a brush cylinder is arranged in the inner cavity of the installation frame.

[0004] Although the above-mentioned prior art can realize flaw detection of sand casting, it has poor flexibility and cannot realize comprehensive detection quickly. Moreover, relative displacement between the casting and the probe easily occurs during the detection process, which reduces the accuracy of flaw detection. Therefore, it does not meet the existing requirements. To solve this problem, we propose a flaw detection equipment for sand casting. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a kind of flaw detection equipment for sand casting, to solve the problem that flaw detection equipment cannot realize comprehensive detection quickly and casting and probe relative displacement easily occurs during the detection process in the above background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of flaw detection equipment for sand casting, including base, two longitudinal guides are installed on the upper end surface of the base by support frame, longitudinal electric slide is slidingly installed on the outside of the longitudinal guide, horizontal guide is fixedly installed between the two longitudinal electric slides, horizontal electric slide is slidingly installed on the outside of the horizontal guide, electric push rod is installed below the horizontal electric slide, mounting head is installed at the bottom of the electric push rod, ultrasonic probe is installed below the mounting head, positioning table is arranged on the front side of the upper end surface of the base, and the center clamping positioning of the sand casting part placed is carried out, coupling agent replenishing mechanism is arranged behind the positioning table.

[0007] Preferably, the inside of the positioning table is internally provided with a chuck, and the chuck is connected with the inner cavity of the positioning table through a bearing, the upper side of the chuck is provided with three annularly distributed clamping jaws, the thread on the upper end surface of the chuck is matched with the limiting thread on the bottom of the clamping jaw, and the clamping jaw is in sliding fit with the guide groove on the upper end of the positioning table, the upper end of the clamping jaw is fixedly provided with a positioning block, and the inside of the base is provided with a servo motor for driving the chuck to rotate.

[0008] Preferably, the rod body of the upper end of the ultrasonic probe extends to the inside of the mounting head and is in sliding limit with the inner cavity of the mounting head, and the inner cavity of the mounting head is provided with a pressure sensor.

[0009] Preferably, the coupling agent supplementing mechanism comprises a coupling agent container, the upper end of the coupling agent container is provided with a conveying pipe, the upper end of the conveying pipe is sealingly provided with a rotary joint, the rotary joint is in rotating fit with the conveying pipe, the upper end of the rotary joint is fixedly provided with a temporary storage disc, and a plurality of through holes are annularly arranged on the bottom of the temporary storage disc.

[0010] Preferably, one side of the coupling agent container is provided with a driving seat, the output group of the motor in the driving seat and the outside of the rotary joint are provided with belt pulleys, and the belt pulleys are driven through a belt.

[0011] Preferably, one side of the positioning table is provided with an ultrasonic flaw detector, and the output end of the ultrasonic probe is electrically connected with the ultrasonic flaw detector.

[0012] Preferably, the coupling agent in the coupling agent container is water glass.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1, the utility model discloses a flexible adjusting mechanism of ultrasonic probe is equipped with, under the cooperation of longitudinal guide rail and longitudinal electric sliding block, can realize the longitudinal movement of ultrasonic probe, under the cooperation of horizontal guide rail and horizontal electric sliding block, can realize the horizontal movement of ultrasonic probe, when sand casting is fixed on the positioning table, the electric push rod is extended, and the lower ultrasonic probe contacts the upper surface of the casting, improves the coverage of detection, ensures that the probe reaches each key detection position, effectively avoids the blind area of detection, and the pressure sensor is installed at the connection of the ultrasonic probe and the electric push rod, can monitor the contact force of the ultrasonic probe in the displacement process with the casting in real time, ensures that the probe and the casting always maintain appropriate contact force, neither because the force is too small leads to ultrasonic signal transmission to be not good, and the detection effect is influenced, nor because the force is too big causes the damage to the surface of the casting.

[0015] 2. The utility model discloses a sand casting part positioning and clamping mechanism, and the operator places the casting part above the positioning table, the inside of base is equipped with servo motor that drives chuck rotation in positioning table, after the rotation of chuck, the plane thread on its upper end surface cooperates with the limiting thread at the bottom of claw, makes the positioning block can move to the casting part direction synchronously, and clamps and positions accurately and stably, in the process of flaw detection, the casting part does not displace due to factors such as vibration, guarantees the accuracy of ultrasonic probe detection position, thereby greatly improves the reliability and stability of flaw detection result.

[0016] 3. The utility model discloses a coupling agent supplementing mechanism is equipped with, after every flaw detection detection setting time, under the cooperation of longitudinal displacement mechanism and transverse displacement mechanism, makes ultrasonic probe locate above the temporary storage tray, the small -size pump in coupling agent supplementing mechanism opens at this moment, and the delivery pipe extrudes coupling agent from the through -hole at the bottom of temporary storage tray, at this moment, the ultrasonic probe enters the temporary storage tray by electric push rod, and the motor in the driving base is opened, and under the cooperation of pulley and belt, the temporary storage tray of installing swivel joint is rotated, makes the coupling agent in the inside even spread on the bottom of ultrasonic probe, and the coupling agent is supplemented continuously and evenly, can ensure that ultrasonic probe and casting part always keep good acoustic coupling effect in the process of flaw detection, greatly improves the transmission quality of ultrasonic signal, avoids the deviation of flaw detection result due to the insufficient or uneven distribution of coupling agent. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the perspective drawing of the utility model;

[0018] Figure 2 It is the front view of the utility model;

[0019] Figure 3 It is the positioning table cutaway perspective drawing of the utility model;

[0020] Figure 4 It is the coupling agent supplementing mechanism perspective drawing of the utility model;

[0021] Figure 5 It is the Figure 2 It is the local enlarged view of A area in the middle.

[0022] In the drawing: 1, base; 2, longitudinal guide rail; 3, longitudinal electric sliding block; 4, transverse guide rail; 5, transverse electric sliding block; 6, electric push rod; 7, mounting head; 8, ultrasonic probe; 9, positioning table; 10, positioning block; 11, ultrasonic flaw detector; 12, coupling agent supplementing mechanism; 13, chuck; 14, claw; 15, coupling agent container; 16, delivery pipe; 17, swivel joint; 18, temporary storage tray; 19, pulley; 20, driving seat; 21, belt; 22, pressure sensor. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0024] Please refer to Figures 1-5 The utility model provides an embodiment: a kind of flaw detection equipment for sand mould casting, including pedestal 1, two longitudinal guides 2 are installed on the upper end surface of pedestal 1 by support frame, longitudinal electric slide 3 is slidably installed in the outside of longitudinal guide 2, transverse guide 4 is fixedly installed between two longitudinal electric slide 3, transverse electric slide 5 is slidably installed in the outside of transverse guide 4, electric push rod 6 is installed below transverse electric slide 5, mounting head 7 is installed in the bottom of electric push rod 6, ultrasonic probe 8 is installed below mounting head 7, ultrasonic flaw detector 11 is installed on the side of positioning table 9, and the output end of ultrasonic probe 8 is electrically connected with ultrasonic flaw detector 11, positioning table 9 is provided on the front side of the upper end surface of pedestal 1, and the center clamping positioning of the sand mould casting placed is carried out, coupling agent replenishing mechanism 12 is provided in the rear of positioning table 9;

[0025] Longitudinal guide 2 and longitudinal electric slide 3 cooperate with each other, longitudinal electric slide 3 is driven by motor and slides on longitudinal guide 2, to realize displacement in longitudinal direction. Similarly, transverse guide 4 and transverse electric slide 5 cooperate, and transverse electric slide 5 slides on transverse guide 4 under the drive of motor, to achieve transverse displacement. Electric push rod 6 drives ultrasonic probe 8 to move up and down. Ultrasonic probe 8 converts electric signal into ultrasonic signal when working and emits into sand mould casting, and the ultrasonic wave reflected by defect is received by probe and converted into electric signal, is transmitted to ultrasonic flaw detector 11 and is analyzed and handled. Ultrasonic probe 8 can move flexibly in three-dimensional space, and different positions of sand mould casting can be detected.

[0026] Please refer to Figure 1 、 Figure 2 And Figure 3 The inside of positioning table 9 is provided with chuck 13, and chuck 13 is connected with the inner chamber of positioning table 9 through bearing, chuck 13 is equipped with three ring distribution's chuck 14 on the top, the thread of chuck 13 upper end surface is compatible with the limit thread of chuck 14 bottom, and chuck 14 is slidably connected with the guide slot of positioning table 9 upper end, chuck 14 is fixedly installed with positioning block 10 on the top, the inside of pedestal 1 is equipped with servo motor for driving chuck 13 rotation;

[0027] After the servo motor inside the base 1 starts, it drives the chuck 13 to rotate. Because the planar thread on the upper surface of the chuck 13 engages with the limiting thread on the bottom of the jaw 14, when the chuck 13 rotates, the jaw 14 moves linearly in the radial direction within the guide groove at the upper end of the positioning table 9. The three ring-shaped jaws 14 move simultaneously, thereby achieving center clamping and positioning of the sand casting placed on the positioning table 9. This allows for quick and precise fixing of the sand casting in a suitable position, ensuring the stability of the casting during flaw detection and preventing the casting's movement from affecting the flaw detection results.

[0028] Please see Figure 5 The upper end of the ultrasonic probe 8 extends into the interior of the mounting head 7 and slides within the inner cavity of the mounting head 7. A pressure sensor 22 is installed inside the inner cavity of the mounting head 7. When the electric push rod 6 pushes the ultrasonic probe 8 downward to contact the sand casting, the ultrasonic probe 8 experiences a reaction force from the surface of the casting. This force is transmitted through the probe rod to the pressure sensor 22 inside the mounting head 7. The pressure sensor 22, based on the piezoelectric effect or strain gauge principle, converts the applied pressure into an electrical signal output. This allows for real-time monitoring of the contact force between the ultrasonic probe 8 and the sand casting, ensuring that the contact force remains within a suitable range.

[0029] Please see Figure 1 , Figure 2 and Figure 4 The coupling agent replenishment mechanism 12 includes a coupling agent container 15, a delivery pipe 16 installed at the upper end of the coupling agent container 15, a rotary joint 17 sealed at the upper end of the delivery pipe 16, and the rotary joint 17 rotatably engages with the delivery pipe 16. A temporary storage plate 18 is fixedly provided at the upper end of the rotary joint 17, and multiple through holes are opened in a ring array at the bottom of the temporary storage plate 18. The coupling agent inside the coupling agent container 15 is water glass. A drive seat 20 is provided on one side of the coupling agent container 15. The output group of the motor inside the drive seat 20 and the outside of the rotary joint 17 are both provided with pulleys 19, and the pulleys 19 are driven by a belt 21.

[0030] When the set detection time is reached, the longitudinal and transverse displacement mechanisms work together to move the ultrasonic probe 8 above the temporary storage tray 18. At this time, the small pump in the coupling agent container 15 is started to pump the water glass coupling agent in the container to the temporary storage tray 18 through the conveying pipe 16. Since the bottom of the temporary storage tray 18 has a plurality of through holes, the coupling agent will be squeezed out from the through holes into the temporary storage tray 18. Then the electric push rod 6 pushes the ultrasonic probe 8 into the temporary storage tray 18, and the motor in the driving seat 20 is started, the motor output shaft drives the belt pulley 19 to rotate, through the belt 21 drives the belt pulley 19 outside the rotary joint 17 to rotate, and then makes the temporary storage tray 18 rotate. In the process of rotation, the coupling agent in the temporary storage tray 18 is evenly coated on the bottom of the ultrasonic probe 8. It ensures that the ultrasonic probe 8 has sufficient and uniform coupling agent during the detection process, greatly improves the transmission efficiency and quality of the ultrasonic signal, and then improves the accuracy of the detection result.

[0031] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A flaw detection apparatus for sand-cast parts, comprising a base (1), characterized in that: The upper end of the base (1) is provided with two longitudinal guide rails (2) on both sides through the support frame, the outer part of the longitudinal guide rail (2) is slidably installed with a longitudinal electric sliding block (3), the two longitudinal electric sliding blocks (3) are fixedly installed with a transverse guide rail (4) between them, the outer part of the transverse guide rail (4) is slidably installed with a transverse electric sliding block (5), the lower part of the transverse electric sliding block (5) is installed with an electric push rod (6), the bottom of the electric push rod (6) is installed with a mounting head (7), the lower part of the mounting head (7) is installed with an ultrasonic probe (8), the front side of the upper end of the base (1) is provided with a positioning table (9), which is used for center clamping positioning of the sand casting part put in, and the rear of the positioning table (9) is provided with a coupling agent supplementing mechanism (12).

2. A sand casting inspection apparatus according to claim 1, wherein: The inside of the positioning table (9) is installed with a chuck (13), and the chuck (13) is connected with the inner cavity of the positioning table (9) through a bearing, the upper part of the chuck (13) is provided with three clamping jaws (14) distributed in a ring shape, the thread on the upper end surface of the chuck (13) is matched with the limiting thread at the bottom of the clamping jaw (14), and the clamping jaw (14) is slidably matched with the guide groove at the upper end of the positioning table (9), the upper end of the clamping jaw (14) is fixedly installed with a positioning block (10), and the inside of the base (1) is provided with a servo motor for driving the chuck (13) to rotate.

3. The apparatus according to claim 1, wherein: The rod body of the upper end of the ultrasonic probe (8) extends to the inside of the mounting head (7) and is slidably limited with the inner cavity of the mounting head (7), and the inner cavity of the mounting head (7) is installed with a pressure sensor (22).

4. The apparatus according to claim 1, wherein: The coupling agent supplementing mechanism (12) comprises a coupling agent container (15), the upper end of the coupling agent container (15) is installed with a conveying pipe (16), the upper end of the conveying pipe (16) is sealingly installed with a rotary joint (17), and the rotary joint (17) is rotatably matched with the conveying pipe (16), the upper end of the rotary joint (17) is fixedly provided with a temporary storage disc (18), and a plurality of through holes are formed in the bottom of the temporary storage disc (18) in an annular array.

5. An apparatus for detecting defects in sand castings according to claim 4, wherein: The side of the coupling agent container (15) is provided with a driving seat (20), the output group of the motor in the inside of the driving seat (20) and the outside of the rotary joint (17) are provided with belt pulleys (19), and the belt pulleys (19) are driven by a belt (21).

6. The apparatus for detecting defects in sand castings according to claim 1, wherein: One side of the positioning table (9) is installed with an ultrasonic flaw detector (11), and the output end of the ultrasonic probe (8) is electrically connected with the ultrasonic flaw detector (11).

7. The apparatus according to claim 4, wherein: The coupling agent in the inside of the coupling agent container (15) is water glass.

Images