Hardness detection device for nodular iron casting

Abstract

The invention relates to the technical field of nodular iron casting hardness detection, in particular to a nodular iron casting hardness detection device. The mounting frame is fixedly mounted on the machine table; and the hardness meter is fixedly mounted on the mounting frame. According to the device, the positions of the grinding plate and the adsorption cleaning body are adjusted through the adjusting assembly, on one hand, different detection positions of the surface of the tubular nodular iron casting are ground and cleaned, the flatness of the detection positions of the tubular nodular iron casting is improved, and a pressure head of a hardness tester is made to make uniform contact with the surface of the tubular nodular iron casting; the accuracy of a detection result is improved; and on the other hand, oil stain cleaning on different detection positions on the surface of the tubular nodular iron casting is realized, and the cleanliness of the detection positions of the tubular nodular iron casting is improved, so that the accuracy of a detection result is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hardness detection of ductile iron castings, and particularly relates to a hardness detection device for ductile iron castings. Background Art

[0002] Ductile iron is a high-strength cast iron material, and its comprehensive performance is close to that of steel. Due to its excellent performance, it has been successfully used in casting some parts with complex stress, high requirements for strength, toughness, and wear resistance. When ductile iron castings are made into pipe bodies, it is often necessary to detect the hardness and strength of the outer wall of the tubular ductile iron castings.

[0003] A hardness detection device for high-end ductile iron castings is disclosed in the Chinese patent with the application number CN202410816402.2, which includes a fixed seat. A movable frame that can move horizontally is arranged on the fixed seat. One end of a support rod one is fixed to the top of the movable frame. A hydraulic rod is fixed to one end of the support rod one. A pressure block is installed at the bottom of the hydraulic rod. A pressure sensor one is embedded at the bottom of the pressure block. A support rod two is fixed above the fixed seat on the movable frame. Electric push rods one are fixed at the positions on the outer walls of the top and bottom of the support rod two corresponding to the pressure block. One end of the electric push rod one is connected to a horizontally placed support roller. In this invention, the contact area between the two support rollers and the inner wall of the tubular ductile iron casting is linear and in the same vertical plane as the pressure block, effectively avoiding excessive acting forces in other positions in different directions during the extrusion process, which may cause irregular deformation of the cast iron casting and affect the accuracy of the position detection of the pressure block.

[0004] However, when the hardness detection device in this patent is used to detect tubular ductile iron castings, it is impossible to pre-treat the surface of the tubular ductile iron castings. When the surface of the tubular ductile iron casting is uneven or attached with oil, it is easy to cause the indenter of the hardness tester to not uniformly contact the surface of the tubular ductile iron casting, and the presence of oil will change the friction coefficient and lubrication state of the surface of the tubular ductile iron casting, thus affecting the penetration depth of the indenter of the hardness tester on the surface of the tubular ductile iron casting, and further reducing the accuracy of the detection result.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above defects. Summary of the Invention

[0006] The purpose of the present invention is to provide a hardness detection device for ductile iron castings that can effectively solve the above technical problems.

[0007] To achieve the purpose of the present invention, the following technical solutions are adopted: A hardness detection device for ductile iron castings, comprising: a machine table; a mounting frame fixedly installed on the machine table; a hardness tester fixedly installed on the mounting frame; a fixing mechanism for fixing the tubular ductile iron casting; a pretreatment mechanism for preprocessing the tubular ductile iron casting before detection; The pretreatment mechanism includes: a grinding plate; an adsorption cleaning body; an adjustment assembly for adjusting the positions of the grinding plate and the adsorption cleaning body; The adjustment assembly includes: a fixed box fixedly installed on the mounting frame; an interlocking gear rotatably installed in the fixed box; an interlocking rack meshed with the interlocking gear; a power source one for driving the interlocking rack to move; a guide rail for limiting the interlocking rack; both the grinding plate and the adsorption cleaning body are fixedly connected to the interlocking rack.

[0008] Furthermore, the pretreatment mechanism further includes: an air jet head and a liquid spray head rotatably installed on the fixed box; an air supply assembly for supplying air to the air jet head; a liquid supply assembly for supplying liquid to the liquid spray head; The air supply assembly includes: an air pump fixedly installed on the mounting frame; a gas collecting pipe fixedly installed on the fixed box; an air inlet pipe connecting the air pump and the gas collecting pipe; an air outlet pipe one connecting the gas collecting pipe and the air jet head; a switching unit for switching the gas flow direction in the gas collecting pipe.

[0009] Furthermore, the switching unit includes: a threaded rod coaxially connected to the interlocking gear; a threaded pipe threadedly connected to the threaded rod; a piston fixedly installed at the end of the threaded pipe; a limiting pipe sleeved on the threaded pipe; a limiting groove opened in the limiting pipe; a limiting strip slidably installed in the limiting groove; the limiting strip is fixedly connected to the threaded pipe.

[0010] Furthermore, the liquid supply assembly includes: a liquid storage tank and a water storage tank fixedly installed on the mounting frame; a liquid storage cylinder fixedly installed on the mounting frame; a suction unit for sucking the cleaning agent in the liquid storage tank and the clear water in the water storage tank into the liquid storage cylinder.

[0011] Furthermore, the suction unit includes: a fixed pipe fixedly installed on the mounting frame; a bladder fixedly installed in the fixed pipe; a liquid inlet pipe connecting the bladder with the liquid storage tank and the water storage tank; a movable plate slidably installed in the fixed pipe; a movable frame fixedly connected to the movable plate; a power source two fixedly installed on the liquid storage cylinder; a circular plate fixedly installed on the output shaft of the power source two; a fixed rod fixedly installed on the circular plate.

[0012] Furthermore, the movable frame is provided with a sliding groove, and the fixed rod is slidably installed in the sliding groove.

[0013] Further, the liquid supply assembly further includes: a liquid guide pipe connecting the bladder and the liquid storage cylinder; a liquid outlet pipe connecting the liquid storage cylinder and the liquid spraying head; and an air outlet pipe two connecting the gas collecting pipe and the liquid storage cylinder.

[0014] Further, the liquid supply assembly further includes: a stirring shaft rotatably installed on the liquid storage cylinder; stirring blades fixedly installed on the stirring shaft; and the stirring shaft is fixedly connected to the output shaft of the power source two.

[0015] Further, the pretreatment mechanism further includes: a reciprocating rack fixedly installed on the movable frame; and a reciprocating gear meshed with the reciprocating rack.

[0016] Further, the fixing mechanism includes: a support frame; a first moving module for driving the support frame to move; a first rotating chuck fixedly installed on the support frame; a second rotating chuck slidably installed on the support frame; a second moving module for driving the second rotating chuck; and a collection box fixedly installed on the support frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. For the hardness detection device of ductile iron castings of the present invention, by adjusting the components to adjust the positions of the grinding plate and the adsorption cleaning body, on the one hand, it realizes the grinding and cleaning of different detection points on the surface of the tubular ductile iron casting, improves the flatness of the detection points of the tubular ductile iron casting, enables the indenter of the hardness tester to uniformly contact the surface of the tubular ductile iron casting, and thus improves the accuracy of the detection result; on the other hand, it realizes the oil stain cleaning of different detection points on the surface of the tubular ductile iron casting, improves the cleanliness of the detection points of the tubular ductile iron casting, and further improves the accuracy of the detection result. 2. For the hardness detection device of ductile iron castings of the present invention, when the grinding plate grinds the surface of the tubular ductile iron casting, the high-pressure gas ejected by the air jet head cleans the waste chips generated during grinding. On the one hand, it avoids the accumulation of waste chips generated by grinding on the surface of the tubular ductile iron casting, which may cause scratches on the surface of the tubular ductile iron casting during grinding, improves the cleanliness of the surface of the tubular ductile iron casting, and thus improves the grinding effect; on the other hand, the ejected gas can dissipate heat from the grinding area of the tubular ductile iron casting, and further improves the grinding effect. 3. For the hardness detection device of ductile iron castings of the present invention, the mixed liquid is sprayed on the surface of the tubular ductile iron casting through the liquid spraying head, and at this time, it cooperates with the adsorption cleaning body to wipe the tubular ductile iron casting, thereby improving the cleaning effect of the oil stains on the surface of the tubular ductile iron casting. In addition, by wiping the tubular ductile iron casting with the mixed liquid in cooperation with the adsorption cleaning body, the waste chips that are not completely removed during grinding can be wiped off, thereby improving the cleanliness and flatness of the tubular ductile iron casting and ensuring the accuracy of the hardness detection. 4. For a hardness detection device of a ductile iron casting according to the present invention, when the second power source is started, it synchronously drives the stirring blades to rotate and the movable frame to reciprocate. On the one hand, it drives the compression and restoration of the bladder, realizing the preliminary mixing of clear water and detergent and then transporting them into the liquid storage cylinder. On the other hand, it remixes the mixed liquid entering the liquid storage cylinder, and at the same time, it can drive the jet head and the liquid spraying head to reciprocate, improving the jet range of the jet head and the liquid spraying range of the liquid spraying head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention.

[0019] Figure 1 It is a three-dimensional schematic diagram of the first moving module of a hardness detection device of a ductile iron casting according to the present invention; Figure 2 It is a three-dimensional schematic diagram of a hardness detection device of a ductile iron casting according to the present invention; Figure 3 It is a three-dimensional schematic diagram of the suction unit of a hardness detection device of a ductile iron casting according to the present invention; Figure 4 It is a sectional view schematic diagram of the fixed pipe of a hardness detection device of a ductile iron casting according to the present invention; Figure 5 It is for a hardness detection device of a ductile iron casting according to the present invention Figure 4 The enlarged view at A in; Figure 6 It is a sectional view schematic diagram of the gas collecting pipe of a hardness detection device of a ductile iron casting according to the present invention; Figure 7 It is a sectional view schematic diagram of the limiting pipe of a hardness detection device of a ductile iron casting according to the present invention.

[0020] In the figure: 1. Machine; 2. Mounting frame; 3. Hardness tester; 4. Pretreatment mechanism; 41. Grinding plate; 42. Adsorption cleaning body; 43. Adjustment component; 431. Fixed box; 432. Power source 1; 433. Linkage rack; 434. Linkage gear; 435. Guide rail; 44. Jet head; 45. Liquid spraying head; 46. Air supply component; 461. Air pump; 462. Air inlet pipe; 463. Collector pipe; 464. Outlet pipe 1; 465. Switching unit; 4651. Threaded rod; 4652. Threaded pipe; 4653. Limit pipe; 4654. Limit strip; 4655. Piston; 47. Liquid supply component; 471. Water storage tank; 472. Liquid storage tank; 473. Suction unit; 4731. Liquid inlet pipe; 4732. Bladder; 4733. Fixed pipe; 4734. Movable plate; 4735. Movable frame; 4736. Power source 2; 4737. Circular plate; 4738. Fixed rod; 474. Liquid storage cylinder; 475. Stirring blade; 476. Outlet pipe; 477. Liquid guide pipe; 478. Outlet pipe 2; 48. Reciprocating rack; 49. Reciprocating gear; 5. Fixing mechanism; 51. Support frame; 52. First rotating chuck; 53. Second rotating chuck; 54. First moving module; 55. Second moving module; 56. Collection box. Detailed implementation mode

[0021] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0023] Such as Figures 1 to 7As shown in the figure, a hardness detection device for ductile iron castings of the present invention includes: a machine table 1; a mounting frame 2 fixedly installed on the machine table 1; a hardness tester 3 fixedly installed on the mounting frame 2; a fixing mechanism 5 for fixing the tubular ductile iron casting; and a pretreatment mechanism 4 for pre-treating the tubular ductile iron casting before detection.

[0024] The hardness tester 3 is a common hardness detection device on the market.

[0025] The fixing mechanism 5 includes: a support frame 51; a first moving module 54 for driving the support frame 51 to move, and the first moving module 54 is fixedly installed on the machine table 1; a first rotating chuck 52 fixedly installed on the support frame 51; a second rotating chuck 53 slidably installed on the support frame 51; a second moving module 55 for driving the second rotating chuck 53, and the second moving module 55 is installed on the support frame 51; a collection box 56 fixedly installed on the support frame 51.

[0026] Before detection, it is necessary to fix the tubular ductile iron casting, that is, one end of the tubular ductile iron casting is clamped and fixed by the first rotating chuck 52. Start the second moving module 55 to drive the second rotating chuck 53 to slide on the support frame 51, so as to facilitate adjusting the position of the second rotating chuck 53 according to the length of the tubular ductile iron casting. The other end of the tubular ductile iron casting can be clamped and fixed by the second rotating chuck 53, thus realizing the rapid fixation of the tubular ductile iron casting.

[0027] It should be added here that both the first rotating chuck 52 and the second rotating chuck 53 are composed of an electric three-jaw chuck and a motor.

[0028] Start the first rotating chuck 52 and the second rotating chuck 53 to drive the tubular ductile iron casting to rotate circumferentially. By starting the first moving module 54, the support frame 51 can be driven to move, so as to drive the tubular ductile iron casting to move axially, thus facilitating the hardness tester 3 to detect the hardness of different positions of the tubular ductile iron casting and improving the adaptability of the device.

[0029] Since the hardness of different positions of the tubular ductile iron casting can be detected, multiple groups of detection data can be obtained, and the average value of multiple groups of data can be calculated as the final detection data of the tubular ductile iron casting, thus improving the accuracy of the hardness detection result of the tubular ductile iron casting.

[0030] In addition, through the fixing mechanism 5, during pretreatment, the tubular ductile iron casting can be moved to the pretreatment mechanism 4. After pretreatment, the tubular ductile iron casting can be moved to the hardness tester 3 for detection.

[0031] The preprocessing mechanism 4 includes: a grinding plate 41; an adsorption cleaning body 42; an adjustment assembly 43 for adjusting the positions of the grinding plate 41 and the adsorption cleaning body 42; the adjustment assembly 43 includes: a fixed box 431 fixedly installed on the mounting frame 2; a linkage gear 434 rotatably installed in the fixed box 431; two linkage racks 433 meshed with the linkage gear 434; a power source 432 for driving the movement of the linkage racks 433, the power source 432 being fixedly installed in the fixed box 431 and fixedly connected to the adjacent linkage rack 433 of the movable end of the power source 432; a guide rail 435 for limiting the movement of the linkage racks 433, the guide rail 435 being fixedly installed in the fixed box 431; both the grinding plate 41 and the adsorption cleaning body 42 are fixedly connected to the linkage racks 433.

[0032] When preprocessing the ductile iron castings, by starting the power source 432, the adjacent linkage rack 433 is driven to move downward, thereby driving the grinding plate 41 to move downward and driving the linkage gear 434 to rotate. The linkage gear 434 drives the other linkage rack 433 to move upward, thereby driving the adsorption cleaning body 42 to move upward, so that the grinding plate 41 abuts against the surface of the ductile iron castings, and thus the surface of the ductile iron castings is first ground to make its surface flat.

[0033] At this time, the fixing mechanism 5 can be started, which can drive the ductile iron castings to rotate circumferentially and also drive the ductile iron castings to move axially, so that different detection parts on the surface of the ductile iron castings can be ground and cleaned, improving the flatness of the detection parts of the ductile iron castings, making the indenter of the hardness tester 3 uniformly contact the surface of the ductile iron castings, and thus improving the accuracy of the detection results.

[0034] When the dust cleaning of the ductile iron castings is completed, start the power source 432 to drive the linkage racks 433 to move upward, thereby driving the grinding plate 41 to move upward, and the other linkage rack 433 drives the adsorption cleaning body 42 to move downward, so that the adsorption cleaning body 42 abuts against the surface of the ductile iron castings.

[0035] At this time, the fixing mechanism 5 can be started, which can drive the ductile iron castings to rotate circumferentially and also drive the ductile iron castings to move axially, so that different detection parts on the surface of the ductile iron castings can be cleaned of oil stains, improving the cleanliness of the detection parts of the ductile iron castings, and avoiding the problem that the presence of oil stains will change the friction coefficient and lubrication state of the surface of the ductile iron castings, thereby affecting the indentation depth of the indenter of the hardness tester 3 on the surface of the ductile iron castings, and thus further improving the accuracy of the detection results.

[0036] In the present invention, the position of the grinding plate 41 and the adsorption cleaning body 42 is adjusted by the adjusting assembly 43. On the one hand, it realizes the grinding and cleaning of different detection positions on the surface of the tubular ductile iron casting, improves the flatness of the detection positions of the tubular ductile iron casting, enables the indenter of the hardness tester 3 to uniformly contact the surface of the tubular ductile iron casting, and thus improves the accuracy of the detection results. On the other hand, it realizes the oil stain cleaning of different detection positions on the surface of the tubular ductile iron casting, improves the cleanliness of the detection positions of the tubular ductile iron casting, and avoids the problem that the existence of oil stains will change the friction coefficient and lubrication state of the surface of the tubular ductile iron casting, thereby affecting the indentation depth of the indenter of the hardness tester 3 on the surface of the tubular ductile iron casting, and further improves the accuracy of the detection results.

[0037] It should be added here that the power source one 432 is preferably a cylinder; the adsorption cleaning body 42 is preferably a sponge.

[0038] The pretreatment mechanism 4 further includes: a jet head 44 and a liquid spraying head 45 rotatably installed on the fixed box 431; a gas supply assembly 46 for supplying gas to the jet head 44; a liquid supply assembly 47 for supplying liquid to the liquid spraying head 45; the gas supply assembly 46 includes: an air pump 461 fixedly installed on the mounting frame 2; a gas collecting pipe 463 fixedly installed on the fixed box 431; an air inlet pipe 462 connecting the air pump 461 and the gas collecting pipe 463; an air outlet pipe one 464 connecting the gas collecting pipe 463 and the jet head 44; a switching unit 465 for switching the gas flow direction in the gas collecting pipe 463.

[0039] When the grinding plate 41 moves downward, it can drive the switching unit 465 to operate. The switching unit 465 includes: a threaded rod 4651 coaxially connected with the linkage gear 434; a threaded pipe 4652 threadedly connected with the threaded rod 4651; a piston 4655 fixedly installed at the end of the threaded pipe 4652; a limiting pipe 4653 sleeved on the threaded pipe 4652, and the limiting pipe 4653 is fixedly installed on the fixed box 431; a limiting groove opened in the limiting pipe 4653; a limiting strip 4654 slidably installed in the limiting groove; the limiting strip 4654 is fixedly connected with the threaded pipe 4652.

[0040] That is, the linkage gear 434 drives the threaded rod 4651 to rotate, the threaded rod 4651 drives the threaded pipe 4652 to move, and through the mutual cooperation of the limiting pipe 4653 and the limiting strip 4654, the threaded pipe 4652 can be limited, so that the threaded pipe 4652 moves along the axial direction of the threaded rod 4651, and further drives the piston 4655 to slide in the gas collecting pipe 463 along the axial direction of the threaded rod 4651.

[0041] When the grinding plate 41 moves downward to abut against the ductile iron casting, the piston 4655 moves between the air outlet end of the intake pipe 462 and the air inlet end of the second outlet pipe 478, thereby separating the air outlet end of the intake pipe 462 from the air inlet end of the second outlet pipe 478. At this time, the gas generated by starting the air pump 461 enters the header pipe 463 through the intake pipe 462 and is delivered to the jet head 44 through the first outlet pipe 464. The high-pressure gas ejected from the jet head 44 can clean the waste chips generated during grinding, and the blown waste chips fall into the collection box 56 for collection.

[0042] In the present invention, while the grinding plate 41 grinds the surface of the ductile iron casting, the high-pressure gas ejected from the jet head 44 cleans the waste chips generated during grinding. On the one hand, it avoids the accumulation of waste chips generated by grinding on the surface of the ductile iron casting, which may cause scratches on the surface of the ductile iron casting during grinding, improving the cleanliness of the surface of the ductile iron casting and thus enhancing the grinding effect. On the other hand, the ejected gas can dissipate heat from the grinding area of the ductile iron casting, further improving the grinding effect.

[0043] Although wiping the surface of the ductile iron casting with the adsorption cleaning body 42 can clean the oil stains on the surface of the ductile iron casting, for stubborn oil stains, they cannot be completely removed only by wiping.

[0044] The liquid supply assembly 47 includes: a liquid storage tank 472 and a water storage tank 471 fixedly installed on the mounting frame 2; a liquid storage cylinder 474 fixedly installed on the mounting frame 2; a suction unit 473 that sucks the cleaning agent in the liquid storage tank 472 and the clear water in the water storage tank 471 into the liquid storage cylinder 474; the suction unit 473 includes: a fixed pipe 4733 fixedly installed on the mounting frame 2; a bladder 4732 fixedly installed inside the fixed pipe 4733; a liquid inlet pipe 4731 that communicates the bladder 4732 with the liquid storage tank 472 and the water storage tank 471; a movable plate 4734 slidably installed inside the fixed pipe 4733, and the movable plate 4734 is fixedly connected to the bladder 4732; a movable frame 4735 fixedly connected to the movable plate 4734; a second power source 4736 fixedly installed on the liquid storage cylinder 474; a circular plate 4737 fixedly installed on the output shaft of the second power source 4736; a fixed rod 4738 fixedly installed on the circular plate 4737; the movable frame 4735 is provided with a chute, and the fixed rod 4738 is slidably installed in the chute; the liquid supply assembly 47 further includes: a liquid guide pipe 477 that communicates the bladder 4732 with the liquid storage cylinder 474; a liquid outlet pipe 476 that communicates the liquid storage cylinder 474 with the liquid spraying head 45; a second outlet pipe 478 that communicates the header pipe 463 with the liquid storage cylinder 474.

[0045] After the grinding is completed, the adjusting component 43 drives the grinding plate 41 to move upward, and makes the adsorption cleaning body 42 abut against the surface of the ductile iron casting. At this time, the air pump 461 and the second power source 4736 are started. By starting the second power source 4736, the circular plate 4737 can be driven to rotate. The circular plate 4737 drives the fixed rod 4738 to rotate. By sliding the fixed rod 4738 in the chute, the movable frame 4735 reciprocates axially along the liquid storage cylinder 474, thereby driving the movable plate 4734 to slide in the liquid storage cylinder 474 and driving the bladder 4732 to be reciprocally compressed and restored.

[0046] The two liquid inlet ends of the liquid inlet pipe 4731 are respectively communicated with the liquid storage tank 472 and the water storage tank 471. The liquid outlet end of the liquid inlet pipe 4731 is communicated with the bladder 4732. First one-way valves are installed at the two liquid inlet ends of the liquid inlet pipe 4731, and a second one-way valve is installed at the liquid outlet end of the liquid guide pipe 477.

[0047] The liquid storage tank 472 stores a cleaning agent, and the water storage tank 471 stores clean water. During use, the cleaning agent and clean water are sucked out and mixed into a mixed liquid for use. Since the cleaning agent and clean water are stored separately, the storage time of the cleaning agent and clean water can be increased, and the situation of waste caused by the premature mixing of the unused mixed liquid can be avoided.

[0048] When the bladder 4732 is restored, suction can be generated. At this time, the first one-way valve is opened and the second one-way valve is closed. At this time, the cleaning agent and clean water are respectively sucked out and enter the bladder 4732. Since the cleaning agent and clean water pass through the liquid outlet end of the same liquid inlet pipe 4731, the cleaning agent and clean water entering the bladder 4732 are preliminarily mixed.

[0049] When the bladder 4732 is compressed, the mixed liquid can be extruded. At this time, the first one-way valve is closed and the second one-way valve is opened. The mixed liquid is extruded and enters the liquid storage cylinder 474, preparing for subsequent use.

[0050] In the present invention, the compression and restoration of the bladder 4732 can, on the one hand, preliminarily mix the cleaning agent and clean water, and on the other hand, transport the mixed mixed liquid to the liquid storage cylinder 474.

[0051] When the adsorption cleaning body 42 moves downward and abuts against the ductile iron casting, the piston 4655 moves between the air outlet end of the air inlet pipe 462 and the air inlet end of the first air outlet pipe 464, thereby separating the air outlet end of the air inlet pipe 462 from the air inlet end of the first air outlet pipe 464. At this time, the gas generated by starting the air pump 461 enters the gas collecting pipe 463 through the air inlet pipe 462 and is transported to the liquid storage cylinder 474 through the second air outlet pipe 478. At this time, the high-pressure gas entering the liquid storage cylinder 474 can agitate the mixed liquid in the liquid storage cylinder 474 with air, thereby realizing secondary mixing and further improving the uniformity of the mixed liquid.

[0052] Moreover, when a certain amount of high-pressure gas enters the liquid storage cylinder 474, the mixed liquid in the liquid storage cylinder 474 is under the action of air pressure and enters the liquid spraying head 45 through the liquid outlet pipe 476 for spraying.

[0053] In the present invention, the mixed liquid is sprayed on the surface of the tubular ductile iron casting through the liquid spraying head 45. At this time, the adsorption cleaning body 42 is cooperated to wipe the tubular ductile iron casting, thereby improving the cleaning effect on the oil stains on the surface of the tubular ductile iron casting.

[0054] In addition, by wiping the tubular ductile iron casting with the mixed liquid in cooperation with the adsorption cleaning body 42, the waste chips that are not completely removed during grinding can be wiped off, thereby improving the cleanliness and flatness of the tubular ductile iron casting and ensuring the accuracy of hardness detection.

[0055] It should be added here that the power source two 4736 is preferably a double-shaft motor.

[0056] In the present invention, through the setting of the switching unit 465, the flow direction of the high-pressure gas generated by the air pump 461 can be switched according to the use states of the grinding plate 41 and the adsorption cleaning body 42. When the grinding plate 41 grinds the tubular ductile iron casting, the high-pressure gas flows into the jet head 44 to clean the waste chips generated during grinding. When the adsorption cleaning body 42 wipes the tubular ductile iron casting, the high-pressure gas flows into the liquid storage cylinder 474. While air-stirring the mixed liquid in the liquid storage cylinder 474, the liquid storage cylinder 474 is pressurized, so that the mixed liquid is under the action of air pressure, transported to the liquid spraying head 45 and sprayed on the surface of the tubular ductile iron casting, improving the cleaning effect on the oil stains on the surface of the tubular ductile iron casting.

[0057] The liquid supply assembly 47 further includes: a stirring shaft rotatably installed on the liquid storage cylinder 474; stirring blades 475 fixedly installed on the stirring shaft; and the stirring shaft is fixedly connected to the output shaft of the power source two 4736.

[0058] When the power source two 4736 is started, it can drive the stirring shaft to rotate, and the stirring shaft drives the stirring blades 475 to rotate, so as to mix the mixed liquid in the liquid storage cylinder 474 three times, further improving the uniformity of the mixed liquid and thus improving the cleaning effect on the oil stains.

[0059] The pretreatment mechanism 4 further includes: a reciprocating rack 48 fixedly installed on the movable frame 4735; reciprocating gears 49 meshed with the reciprocating rack 48. There are two reciprocating gears 49, and the two reciprocating gears 49 are respectively fixedly sleeved on the jet head 44 and the liquid spraying head 45; the movable frame 4735 is slidably installed on the fixed box 431.

[0060] When the movable frame 4735 reciprocates, it can drive the reciprocating rack 48 to reciprocate. The reciprocating rack 48 drives the reciprocating gear 49 to rotate reciprocally, thereby driving the air jet head 44 and the liquid spray head 45 to swing reciprocally, improving the air jet range of the air jet head 44 and the liquid spray range of the liquid spray head 45. On the one hand, it improves the effect of cleaning waste chips during grinding; on the other hand, it improves the cleaning effect of oil stains during cleaning.

[0061] In the present invention, when the power source two 4736 is started, it synchronously drives the stirring blade 475 to rotate and the movable frame 4735 to reciprocate. On the one hand, it drives the bladder 4732 to be compressed and restored, realizing the preliminary mixing of clean water and detergent and then transporting them into the liquid storage cylinder 474. On the other hand, it remixes the mixed liquid entering the liquid storage cylinder 474, and at the same time, it can drive the air jet head 44 and the liquid spray head 45 to swing reciprocally, improving the air jet range of the air jet head 44 and the liquid spray range of the liquid spray head 45.

[0062] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0063] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A hardness testing device for ductile iron castings, characterized in that, Including: A machine platform (1); A mounting rack (2) fixedly installed on the machine platform (1); A hardness tester (3) fixedly installed on the mounting rack (2); A fixing mechanism (5) for fixing a ductile iron casting; A pretreatment mechanism (4) for preprocessing before detecting the ductile iron casting; The pretreatment mechanism (4) includes: A grinding plate (41); An adsorption cleaning body (42); An adjusting component (43) for adjusting the positions of the grinding plate (41) and the adsorption cleaning body (42); The adjusting component (43) includes: A fixed box (431) fixedly installed on the mounting rack (2); A linkage gear (434) rotatably installed in the fixed box (431); A linkage rack (433) meshed and connected with the linkage gear (434); A power source one (432) for driving the linkage rack (433) to move; A guide rail (435) for limiting the movement of the linkage rack (433); Both the grinding plate (41) and the adsorption cleaning body (42) are fixedly connected to the linkage rack (433).

2. The hardness detection device for ductile iron castings according to claim 1, characterized in that, The pretreatment mechanism (4) further includes: An air jet head (44) and a liquid spray head (45) rotatably installed on the fixed box (431); An air supply component (46) for supplying air to the air jet head (44); A liquid supply component (47) for supplying liquid to the liquid spray head (45); The air supply component (46) includes: An air pump (461) fixedly installed on the mounting rack (2); A collecting air pipe (463) fixedly installed on the fixed box (431); An air inlet pipe (462) connecting the air pump (461) and the collecting air pipe (463); An air outlet pipe one (464) connecting the collecting air pipe (463) and the air jet head (44); A switching unit (465) for switching the gas flow direction in the collecting air pipe (463).

3. The hardness detection device for ductile iron castings according to claim 2, characterized in that, The switching unit (465) includes: A threaded rod (4651) coaxially connected with the linkage gear (434); A threaded pipe (4652) threadedly connected with the threaded rod (4651); A piston (4655) fixedly installed at the end of the threaded pipe (4652); A limiting pipe (4653) sleeved on the threaded pipe (4652); A limiting groove opened in the limiting pipe (4653); A limiting strip (4654) slidably installed in the limiting groove; The limiting strip (4654) is fixedly connected to the threaded pipe (4652).

4. The hardness detection device for ductile iron castings according to claim 2, characterized in that, The liquid supply component (47) includes: A liquid storage tank (472) and a water storage tank (471) fixedly installed on the mounting rack (2); A liquid storage cylinder (474) fixedly installed on the mounting rack (2); An absorbing unit (473) for sucking the cleaning agent in the liquid storage tank (472) and the clear water in the water storage tank (471) into the liquid storage cylinder (474).

5. The hardness detection device for ductile iron castings according to claim 4, characterized in that, The suction unit (473) includes: a fixed pipe (4733) fixedly installed on the mounting frame (2); a bladder (4732) fixedly installed inside the fixed pipe (4733); a liquid inlet pipe (4731) connecting the bladder (4732) with the liquid storage tank (472) and the water storage tank (471); a movable plate (4734) slidably installed inside the fixed pipe (4733); a movable frame (4735) fixedly connected to the movable plate (4734); a second power source (4736) fixedly installed on the liquid storage cylinder (474); a circular plate (4737) fixedly installed on the output shaft of the second power source (4736); and a fixed rod (4738) fixedly installed on the circular plate (4737).

6. The hardness detection device for ductile iron castings according to claim 5, characterized in that, The movable frame (4735) is provided with a chute, and the fixed rod (4738) is slidably installed in the chute.

7. The hardness detection device for ductile iron castings according to claim 5, characterized in that, The liquid supply assembly (47) further includes: a liquid guide pipe (477) connecting the bladder (4732) with the liquid storage cylinder (474); a liquid outlet pipe (476) connecting the liquid storage cylinder (474) with the liquid spraying head (45); and a second air outlet pipe (478) connecting the air collecting pipe (463) with the liquid storage cylinder (474).

8. The hardness detection device for ductile iron castings according to claim 5, wherein, The liquid supply assembly (47) further includes: a stirring shaft rotatably installed on the liquid storage cylinder (474); stirring blades (475) fixedly installed on the stirring shaft; and the stirring shaft is fixedly connected to the output shaft of the second power source (4736).

9. The hardness detection device for ductile iron castings according to claim 5, characterized in that, The pretreatment mechanism (4) further includes: a reciprocating rack (48) fixedly installed on the movable frame (4735); and a reciprocating gear (49) meshed with the reciprocating rack (48).

10. The hardness detection device for a ductile iron casting as described in claim 1, wherein The fixing mechanism (5) includes: a support frame (51); a first moving module (54) driving the support frame (51) to move; a first rotating chuck (52) fixedly installed on the support frame (51); a second rotating chuck (53) slidably installed on the support frame (51); a second moving module (55) driving the second rotating chuck (53); and a collection box (56) fixedly installed on the support frame (51).

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