An internal defect detection device for metal part casting

Abstract

The present invention discloses an internal defect detection device for metal part casting, which relates to the technical field of casting inspection. In the present invention, the lifting electric cylinder drives the up and down movement of the lifting frame and the steel plate to separate the casting from the trolley plate, and the pressure sensor can be combined to accurately measure the weight of the casting. At the same time, through the cooperation of the vacuum pump and the flowmeter, the volume of the casting can be accurately measured, so as to calculate the density of the casting and detect whether there are defects inside the casting. This measurement method is simple and effective, and can avoid measurement errors caused by the complex shape of the casting; through the cooperation of motors such as the transmission motor, the lifting electric cylinder, the lifting motor, and the locking motor, the automatic control of the trolley plate, the lifting frame, the sealing cover, and the lifting bar is realized, reducing manual intervention and improving the operation simplicity and reliability of the device. At the same time, the coordinated cooperation of each motor makes the detection process smoother and more efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of casting inspection, and specifically to an internal defect detection device for metal part casting. Background Art

[0002] In the prior art, non-destructive testing methods such as X-ray and ultrasonic testing are usually used for defect detection of castings. Although these methods can detect internal defects of castings, there are some deficiencies. First, these testing methods require professional equipment and operators, with high costs, and the testing process is complex and easily affected by the external environment and operators. Second, for castings with complex shapes or large sizes, the testing difficulty and cost of these methods are even higher. And rapid batch testing cannot be carried out, so there is a need to develop a device for detecting internal defects of castings with low cost and high efficiency. Summary of the Invention

[0003] To overcome the defects of the above prior art, the present invention provides the following technical solution: An internal defect detection device for metal part casting, including a bottom sealed shell, inside which two symmetrically and parallelly arranged support side plates are fixed. At the top of both support side plates, internal slide rails are fixed, and the two internal slide rails are arranged in parallel. A vacuum pump and a valve are fixedly connected to the bottom sealed shell, and a flow meter is connected in series to the valve for detecting the volume of gas entering the inside of the bottom sealed shell. An elevating frame capable of moving up and down is also provided inside the bottom sealed shell. A steel plate is provided on the elevating frame, and a pressure sensor is arranged between the elevating frame and the steel plate. A sunken groove is formed at the top of the bottom sealed shell, and a sealing rubber ring is provided inside the sunken groove. A sealing cover is arranged above the bottom sealed shell, and a barometer is provided on the sealing cover. A protrusion capable of being embedded inside the sunken groove is arranged at the bottom of the sealing cover, so that a sealed space is formed between the sealing cover and the bottom sealed shell.

[0004] Preferably, a support flat plate is fixedly installed between the two support side plates. Four elevating rods are slidably installed on the support flat plate along the vertical direction. The four elevating rods are fixedly cooperated with the elevating frame. A lifting electric cylinder is arranged in the middle of the four elevating rods. The lifting electric cylinder is fixed on the support flat plate, and the telescopic rod of the lifting electric cylinder is fixed to the elevating frame for driving the elevating frame and the steel plate to move up and down.

[0005] Preferably, four parallelly arranged top guiding rods are fixedly installed on the sealing cover. The top guiding rods are slidably installed on the top platform. A rectangular through hole is formed on the top platform, and a pulling bar fixedly cooperated with the sealing cover is slidably installed in the rectangular through hole. The top platform is fixed on the substrate through an overhead column, and the bottom sealed shell is also fixed on the substrate.

[0006] Preferably, a trapezoidal limiting groove is formed in the lifting bar, a clamping post is lapped and fitted on the inclined surface in the trapezoidal limiting groove, a toggle block is arranged between the clamping post and the upper bottom edge of the trapezoidal limiting groove, a gap is left between the toggle block and the upper bottom edge of the trapezoidal limiting groove, the toggle block is in contact and fit with the clamping post, an elastic pad is arranged between the clamping post and the lower bottom edge of the trapezoidal limiting groove, and the clamping post is in sliding friction fit with the top platform.

[0007] Preferably, two externally parallel and symmetrically arranged external slide rails are fixedly installed above the substrate in a suspended manner, the two external slide rails are aligned with the two internal slide rails, a transmission belt bracket is arranged between the two external slide rails, the transmission belt bracket is fixed on the substrate, a transmission belt is rotatably fitted on the transmission belt bracket, and the transmission belt is driven by a transmission motor fixed on the transmission belt bracket.

[0008] Preferably, two parallel guiding sliding rods are further arranged on the inner sides of the two external slide rails, the two guiding sliding rods are fixed on the substrate, and a pulling frame is slidably mounted on the two guiding sliding rods.

[0009] Preferably, two parallel push-pull screws are rotatably installed on the pulling frame, the two push-pull screws are synchronously rotated through a synchronous chain, a locking motor is fixedly installed on the pulling frame, and the output shaft of the locking motor is fixed to one of the push-pull screws.

[0010] Preferably, a trolley plate is arranged to roll on the internal slide rail and / or the external slide rail, two threaded holes capable of being in threaded fit with the push-pull screws are formed in the trolley plate, the pulling frame is further fixedly fitted with the transmission belt, the transmission belt is used for driving the pulling frame to slide on the guiding sliding rod, a limiting plate is fixed between the two internal slide rails or the two supporting side plates, the limiting plate is in contact and fit with the trolley plate for positioning the position of the trolley plate, and a rectangular frame is arranged in the middle of the trolley plate, and the steel plate can pass through the rectangular frame.

[0011] Preferably, a lifting motor is fixedly installed on the top platform, a gear is fixedly installed on the output shaft of the lifting motor, a rack is further slidably installed in a rectangular through hole formed in the top platform, the rack is in meshing transmission with the gear, and the toggle block is fixed on the rack.

[0012] The present invention has the following beneficial effects compared with the prior art: (1) The present invention realizes the separation of the casting and the trolley plate by driving the lifting frame and the steel plate to move up and down through the lifting electric cylinder, and combines with the pressure sensor to accurately measure the weight of the casting. At the same time, through the cooperation of the vacuum pump and the flow meter, the volume of the casting can be accurately measured, so as to calculate the density of the casting and detect whether there are defects inside the casting. This measurement method is simple and effective, and can avoid measurement errors caused by the complex shape of the casting; (2) The present invention realizes the automatic control of the trolley plate, the lifting frame, the sealing cover and the lifting strip through the cooperation of motors such as the transmission motor, the lifting electric cylinder, the lifting motor and the locking motor, reduces manual intervention, and improves the operation simplicity and reliability of the equipment. At the same time, the coordinated cooperation of each motor makes the detection process smoother and more efficient; (3) The present invention can realize accurate measurement and detection through this equipment regardless of the complex shape of the casting, and has strong adaptability and versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the pulling frame structure of the present invention;

[0015] Figure 3 It is a schematic diagram of the structure at the top platform of the present invention;

[0016] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at position A;

[0017] Figure 5 It is a schematic diagram of the rack structure of the present invention;

[0018] Figure 6 It is a schematic diagram of the bottom sealing shell structure of the present invention;

[0019] Figure 7 It is a schematic diagram of the structure at the limit plate of the present invention;

[0020] Figure 8 It is a schematic diagram of the structure at the lifting electric cylinder of the present invention.

[0021] In the figure: 101-external slide rail; 102-transmission belt bracket; 103-transmission motor; 104-transmission belt; 105-guide sliding rod; 106-pulling frame; 107-push-pull screw rod; 108-trolley plate; 109-threaded hole; 110-synchronous chain; 111-locking motor; 112-internal slide rail; 113-overhead column; 114-top platform; 115-top guide rod; 116-barometer; 117-lifting bar; 118-sealing buckle cover; 119-tooth 120-gear; 121-lifting motor; 122-trapezoidal limiting groove; 123-sliding block; 124-stuck column; 125-elastic pad; 126-bottom sealing shell; 127-vacuum pump; 128-limiting plate; 129-valve; 130-flow meter; 131-support side plate; 132-sealing rubber ring; 133-support flat plate; 134-sinking groove; 135-steel plate; 136-lifting frame; 137-lifting rod; 138-lifting electric cylinder; 139-base plate. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-8 , and further illustrate the technical solution of the present invention through specific implementation methods.

[0023] The present invention provides an internal defect detection device for metal part casting, comprising a bottom sealing shell 126, wherein two symmetrical and parallel supporting side plates 131 are fixed inside the bottom sealing shell 126, and internal slide rails 112 are fixed on the tops of the two supporting side plates 131, and the two internal slide rails 112 are arranged in parallel, and a vacuum pump 127 and a valve 129 are fixedly connected to the bottom sealing shell 126, and a flow meter 130 is connected in series to the valve 129 for detecting the volume of gas entering the bottom sealing shell 126, and a flow meter 130 is also provided inside the bottom sealing shell 126 for detecting the volume of gas entering the bottom sealing shell 126. A lifting frame 136 moves downward, and a steel plate 135 is provided on the lifting frame 136, and a pressure sensor is provided between the lifting frame 136 and the steel plate 135; a sinking groove 134 is opened on the top of the bottom sealing shell 126, and a sealing rubber ring 132 is provided inside the sinking groove 134, and a sealing buckle cover 118 is provided on the top of the bottom sealing shell 126, and a barometer 116 is provided on the sealing buckle cover 118, and a protrusion that can be embedded in the sinking groove 134 is provided at the bottom of the sealing buckle cover 118, so that a closed space is formed between the sealing buckle cover 118 and the bottom sealing shell 126. A support plate 133 is fixedly installed between the two support side plates 131. Four lifting rods 137 are slidably installed on the support plate 133 along the vertical direction. The four lifting rods 137 are fixedly matched with the lifting frame 136. A lifting electric cylinder 138 is provided in the middle of the four lifting rods 137. The lifting electric cylinder 138 is fixed on the support plate 133. The telescopic rod of the lifting electric cylinder 138 is fixed with the lifting frame 136, which is used to drive the lifting frame 136 and the steel plate 135 to move up and down. Four parallel top guide rods 115 are fixedly installed on the sealing buckle cover 118. The top guide rods 115 are slidably installed on the top platform 114. A rectangular through hole is opened on the top platform 114. A lifting bar 117 fixedly matched with the sealing buckle cover 118 is slidably installed in the rectangular through hole. The top platform 114 is fixed on the base plate 139 through the overhead column 113, and the bottom sealing shell 126 is also fixed on the base plate 139. A trapezoidal limiting groove 122 is provided on the lifting bar 117, and a clamping column 124 is overlapped on the inclined surface of the trapezoidal limiting groove 122. A toggle block 123 is provided between the clamping column 124 and the upper bottom edge of the trapezoidal limiting groove 122. A gap is left between the toggle block 123 and the upper bottom edge of the trapezoidal limiting groove 122, the toggle block 123 is in contact with the clamping column 124, and an elastic pad 125 is provided between the clamping column 124 and the lower bottom edge of the trapezoidal limiting groove 122, wherein the clamping column 124 and the top platform 114 are in sliding and frictional cooperation.

[0024] Two parallel and symmetrically arranged external slide rails 101 are fixedly installed on the base plate 139. The two external slide rails 101 are aligned with the two internal slide rails 112. A transmission belt bracket 102 is arranged between the two external slide rails 101. The transmission belt bracket 102 is fixed on the base plate 139. A transmission belt 104 is rotatably arranged on the transmission belt bracket 102. The transmission belt 104 is driven by a transmission motor 103 fixed on the transmission belt bracket 102. Two parallel guide sliding rods 105 are also arranged on the inner side of the two external slide rails 101. The two guide sliding rods 105 are fixed on the base plate 139. A pulling frame 106 is slidably installed on the two guide sliding rods 105. Two parallel push-pull screws 107 are rotatably installed on the pulling frame 106. The two push-pull screws 107 rotate synchronously through a synchronous chain 110. A locking motor 111 is fixedly installed on the pulling frame 106. The output shaft of the locking motor 111 is fixed to one of the push-pull screws 107. A trolley plate 108 is rollingly arranged on the inner slide rail 112 and / or the outer slide rail 101, and two threaded holes 109 are provided on the trolley plate 108 which can be threadedly matched with the push-pull screw 107, wherein the pulling frame 106 is also fixedly matched with the transmission belt 104, and the transmission belt 104 is used to drive the pulling frame 106 to slide on the guide sliding rod 105, and a limit plate 128 is fixed between the two inner slide rails 112 or the two supporting side plates 131, and the limit plate 128 is in contact with the trolley plate 108 for positioning the position of the trolley plate 108, and a rectangular frame is provided in the middle of the trolley plate 108, and the steel plate 135 can pass through the rectangular frame. A lifting motor 121 is fixedly installed on the top platform 114, and a gear 120 is fixedly installed on the output shaft of the lifting motor 121. A rack 119 is also slidably installed in a rectangular through hole opened on the top platform 114. The rack 119 meshes with the gear 120 for transmission, and the toggle block 123 is fixed on the rack 119.

[0025] The working principle of the internal defect detection equipment for metal part casting disclosed in the present invention is as follows: the initial position of the cart plate 108 is on the external slide rail 101, the casting that needs to be detected for defects is placed on the cart plate 108, and then the transmission motor 103 is controlled, the transmission motor 103 drives the transmission belt 104 to rotate, the transmission belt 104 drives the pulling frame 106 to slide on the guide sliding rod 105, and then the push-pull screw 107 on the pulling frame 106 pushes the cart plate 108 from the external slide rail 101 to the internal slide rail 112. Since the internal slide rail 112 is set in the bottom sealing shell 126, at this time, the steel plate 135 is below the cart plate 108 and the casting. Then the telescopic rod of the lifting electric cylinder 138 is controlled, and the lifting electric cylinder 138 lifts up the lifting frame 136 and the steel plate 135, so that the upper surface of the steel plate 135 is higher than the upper surface of the cart plate 108, and the casting on the cart plate 108 is lifted, so that the casting is separated from the cart plate 108. At this time, the weight of the casting can be measured by the pressure sensor.

[0026] Control the lifting motor 121. The output shaft of the lifting motor 121 drives the gear 120 to rotate. The gear 120 drives the rack 119 to move linearly. The rack 119 drives the lifting bar 117 to move linearly through the toggle block 123, that is, the lifting bar 117 is allowed to slide on the top platform 114. The lifting bar 117 will drive the sealing buckle cover 118 to move, so that the sealing buckle cover 118 is buckled with the bottom sealing shell 126, and then start the vacuum pump 127. The vacuum pump 127 makes the space formed by the sealing buckle cover 118 and the bottom sealing shell 126 in a vacuum state. The air pressure changes inside the sealing buckle cover 118 can be observed through the barometer 116, and then the start and stop of the vacuum pump 127 can be controlled (a one-way valve is provided at the connection between the vacuum pump 127 and the bottom sealing shell 126). During this process, valve 129 is in a closed state, and then the vacuum pump 127 is stopped and valve 129 is opened. Under the action of the air pressure difference, external air will enter the space inside the bottom sealing shell 126 and the limit plate 128 through the flow meter 130 and valve 129. Since the casting is inside the sealing buckle cover 118 and the bottom sealing shell 126, the volume inside the sealing buckle cover 118 and the bottom sealing shell 126 will decrease (the initial volume is known because the internal components are fixed inside and have not changed). The volume of the gas entering the internal space of the elastic pad 125 and the sealing buckle cover 118 can be known through the flow meter 130. At this time, the volume of the casting can be known by subtracting the measured volume from the initial volume. This method does not need to consider the shape type of the casting. The density of the casting can be calculated through the volume and weight of the casting. If there is a defective steam drum inside the casting during the casting process, it will affect the density of the casting, so it can be known whether there are defects inside the casting.

[0027] Finally, the lifting motor 121 is controlled to rotate in the opposite direction, and the lifting motor 121 drives the gear 120 to rotate, and the gear 120 drives the rack 119 to move upward. The rack 119 will drive the lifting bar 117 to move upward through the toggle block 123, thereby lifting the sealing buckle cover 118, so that the sealing buckle cover 118 is separated from the bottom sealing shell 126. When the clamping column 124 moves to contact the inner wall of the rectangular through hole opened in the top platform 114 (enters the rectangular through hole), the lifting motor 121 is stopped. Under the action of gravity, the lifting bar 117 will tend to move downward. At this time, the clamping column 124 will be subjected to the friction force from the top platform 114 and will be upward. Therefore, the inclined surface of the trapezoidal limiting groove 122 and the rectangular through hole of the top platform 114 will jam the clamping column 124, thereby preventing the lifting bar 117 from falling, thereby preventing the sealing buckle cover 118 from falling, and there is no need to keep the lifting motor 121 in the started state. When the lifting bar 117 moves downward, the toggle block 123 on the rack 119 will push down the stuck post 124, thereby driving the lifting bar 117 to move.

[0028] The lifting electric cylinder 138 is controlled to lower the steel plate 135 to the lowest position, so that the casting falls back onto the cart plate 108. Finally, the push-pull screw 107 on the pulling frame 106 is controlled to move to the position of the threaded hole 109 (when the sealing buckle cover 118 and the bottom sealing shell 126 are closed, the pull bar 117 needs to be pulled out), and then the locking motor 111 is controlled. The output shaft of the locking motor 111 drives the push-pull screw 107 to rotate, and the two push-pull screws are rotated through the synchronous chain 110. The pulling screw 107 rotates at the same time, and the rotation of the push-pull screw 107 cooperates with the transmission belt bracket 102 to drive the axial movement of the push-pull screw 107, screwing the push-pull screw 107 into the threaded hole 109, and then through the transmission belt bracket 102, driving the pulling frame 106 to move. At this time, the push-pull screw 107 and the trolley plate 108 are fixed in a fixed state, and the trolley plate 108 is pulled from the inner slide rail 112 to the outer slide rail 101, and then the casting after inspection can be taken away.

Claims

1. An internal defect detection device for metal parts casting, characterized in that: The bottom sealing shell (126) comprises two symmetrical and parallel supporting side plates (131) fixed inside the bottom sealing shell (126), the top ends of the two supporting side plates (131) are fixed with internal slide rails (112), the two internal slide rails (112) are arranged in parallel, the bottom sealing shell (126) is fixedly connected with a vacuum pump (127) and a valve (129), the valve (129) is connected in series with a flow meter (130) for detecting the volume of gas entering the bottom sealing shell (126), the bottom sealing shell (126) is also provided with a lifting frame (136) capable of moving up and down, the lifting frame (136) is provided with a steel plate (135), and a pressure sensor is provided between the lifting frame (136) and the steel plate (135); The top of the bottom sealing shell (126) is provided with a sinking groove (134), the inside of the sinking groove (134) is provided with a sealing rubber ring (132), the top of the bottom sealing shell (126) is provided with a sealing buckle cover (118), the sealing buckle cover (118) is provided with a barometer (116), the bottom of the sealing buckle cover (118) is provided with a protrusion that can be embedded in the inside of the sinking groove (134), so that a closed space is formed between the sealing buckle cover (118) and the bottom sealing shell (126), the bottom sealing shell (126) is fixed on a base plate (139), and the base plate (139) is provided with two overhead fixed installations External slide rails (101) are arranged in parallel and symmetrically, the two external slide rails (101) are arranged in alignment with the two internal slide rails (112), a transmission belt bracket (102) is arranged between the two external slide rails (101), the transmission belt bracket (102) is fixed on the base plate (139), a transmission belt (104) is rotatably arranged on the transmission belt bracket (102), and the transmission belt (104) is driven by a transmission motor (103) fixed on the transmission belt bracket (102); two parallel guide sliding rods (105) are also arranged on the inner sides of the two external slide rails (101), and the two guide sliding rods (105) are arranged on the inner sides of the two external slide rails (101). ) is fixed on a base plate (139); a pulling frame (106) is slidably mounted on two guide sliding rods (105); two parallel push-pull screws (107) are rotatably mounted on the pulling frame (106); the two push-pull screws (107) rotate synchronously via a synchronous chain (110); a locking motor (111) is fixedly mounted on the pulling frame (106); an output shaft of the locking motor (111) is fixed to one of the push-pull screws (107); a trolley plate (108) is rotatably mounted on the inner slide rail (112) and / or the outer slide rail (101); and an opening is provided on the trolley plate (108). Two threaded holes (109) capable of threadedly engaging with the push-pull screw rod (107) are provided, wherein the pulling frame (106) is also fixedly engaged with the transmission belt (104), and the transmission belt (104) is used to drive the pulling frame (106) to slide on the guide sliding rod (105), and a limit plate (128) is fixed between the two internal slide rails (112) or the two supporting side plates (131), and the limit plate (128) is in contact with the trolley plate (108) to locate the position of the trolley plate (108), and a rectangular frame is provided in the middle of the trolley plate (108), and the steel plate (135) can pass through the rectangular frame.

2. The internal defect detection device for metal parts casting according to claim 1 is characterized in that: A support plate (133) is fixedly installed between the two support side plates (131), and four lifting rods (137) are slidably installed on the support plate (133) along the vertical direction. The four lifting rods (137) are fixedly matched with the lifting frame (136), and a lifting electric cylinder (138) is provided in the middle of the four lifting rods (137). The lifting electric cylinder (138) is fixed on the support plate (133), and the telescopic rod of the lifting electric cylinder (138) is fixed to the lifting frame (136) for driving the lifting frame (136) and the steel plate (135) to move up and down.

3. The internal defect detection device for metal parts casting according to claim 2 is characterized in that: Four parallel top guide rods (115) are fixedly mounted on the sealing buckle cover (118), and the top guide rods (115) are slidably mounted on the top platform (114). A rectangular through hole is provided on the top platform (114), and a lifting bar (117) fixedly matched with the sealing buckle cover (118) is slidably mounted in the rectangular through hole. The top platform (114) is fixed on the base plate (139) through an overhead column (113).

4. The internal defect detection device for metal parts casting according to claim 3 is characterized in that: A trapezoidal limiting groove (122) is provided on the lifting bar (117), and a clamping column (124) is overlapped on the inclined surface inside the trapezoidal limiting groove (122), a toggle block (123) is arranged between the clamping column (124) and the upper bottom edge of the trapezoidal limiting groove (122), a gap is left between the toggle block (123) and the upper bottom edge of the trapezoidal limiting groove (122), the toggle block (123) is in contact with the clamping column (124), and an elastic pad (125) is arranged between the clamping column (124) and the lower bottom edge of the trapezoidal limiting groove (122), wherein the clamping column (124) and the top platform (114) are in sliding frictional cooperation.

5. The internal defect detection device for metal parts casting according to claim 4 is characterized in that: A lifting motor (121) is fixedly mounted on the top platform (114), a gear (120) is fixedly mounted on the output shaft of the lifting motor (121), a rack (119) is slidably mounted in a rectangular through hole opened on the top platform (114), the rack (119) is meshed with the gear (120) for transmission, and a toggle block (123) is fixed on the rack (119).

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