A hardness testing device for ductile iron castings

Abstract

The present invention relates to the technical field of hardness testing of ductile iron parts, and specifically to a hardness testing device for ductile iron parts, comprising: a machine platform; a mounting frame fixedly mounted on the machine platform; and a hardness tester fixedly mounted on the mounting frame. In the present invention, the position of a grinding plate and an adsorption cleaning body is adjusted by adjusting a component. On the one hand, different testing locations on the surface of a tubular ductile iron part are polished and cleaned, thereby improving the flatness of the testing location of the tubular ductile iron part and allowing the pressure head of the hardness tester to uniformly contact the surface of the tubular ductile iron part, thereby improving the accuracy of the test results. On the other hand, oil stains are cleaned at different testing locations on the surface of the tubular ductile iron part, thereby improving the cleanliness of the testing location of the tubular ductile iron part and further improving the accuracy of the test results.

Description

Technical Field

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

[0002] Ductile iron is a high-strength cast iron material with comprehensive properties close to those of steel. Due to its excellent properties, it has been successfully used in casting parts with complex stresses and high requirements for strength, toughness and wear resistance. When ductile iron parts are manufactured into pipes, it is often necessary to conduct hardness strength tests on the outer wall of the tubular ductile iron parts.

[0003] A Chinese patent application numbered CN202410816402.2 discloses a hardness testing device for high-end ductile iron castings, comprising a fixed seat, on which a horizontally movable frame is provided, a support rod 1 being fixed to the top of the movable frame, a hydraulic rod being fixed to one end of the support rod 1, a pressure block being mounted at the bottom end of the hydraulic rod, a pressure sensor 1 being embedded in the bottom of the pressure block, a support rod 2 being fixed to the movable frame above the fixed seat, an electric push rod 1 being fixed to the top and bottom outer walls of the support rod 2 at positions corresponding to the pressure block, one end of the electric push rod 1 being connected to a horizontally placed support roller. This invention effectively avoids the presence of excessive forces in different directions other than the pressure applied during the extrusion process, which would cause irregular deformation of the cast iron part and affect the accuracy of the pressure block position detection, by ensuring that the contact area between the two support rollers and the inner wall of the tubular ductile iron casting is linear and on the same vertical plane as the pressure block.

[0004] However, when the hardness testing device in this patent is used to test tubular ductile iron parts, it is unable to pre-treat the surface of the tubular ductile iron parts. When the surface of the tubular ductile iron parts is uneven or oily, the indenter of the hardness tester may not be able to contact the surface of the tubular ductile iron parts evenly. The presence of oil will change the friction coefficient and lubrication state of the surface of the tubular ductile iron parts, thereby affecting the depth of penetration of the indenter of the hardness tester into the surface of the tubular ductile iron parts, thereby reducing the accuracy of the test results.

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

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

[0007] In order to achieve the purpose of the present invention, the following technical solutions are adopted:

[0008] A device for testing the hardness of ductile iron castings, comprising: a machine platform; a mounting frame fixedly mounted on the machine platform; a hardness tester fixedly mounted on the mounting frame; a fixing mechanism for fixing the tubular ductile iron castings; and a pre-treatment mechanism for pre-treating the tubular ductile iron castings before testing.

[0009] The pretreatment mechanism includes: a grinding plate; an adsorption cleaning body; and an adjustment component for adjusting the positions of the grinding plate and the adsorption cleaning body.

[0010] The adjustment assembly includes: a fixed box fixedly installed on the mounting frame; a linkage gear rotatably installed in the fixed box; a linkage rack meshing with the linkage gear; a power source for driving the linkage rack to move; a guide rail for limiting the linkage rack; the polishing plate and the adsorption cleaning body are both fixedly connected to the linkage rack.

[0011] Furthermore, the pretreatment mechanism further comprises: an air jet head and a liquid jet head rotatably mounted on the fixed box; an air supply assembly for supplying air to the air jet head; and a liquid supply assembly for supplying liquid to the liquid jet head.

[0012] The air supply assembly includes: an air pump fixedly mounted on the mounting frame; an air collecting pipe fixedly mounted on the fixed box; an air inlet pipe connecting the air pump and the air collecting pipe; an air outlet pipe connecting the air collecting pipe and the nozzle; and a switching unit for switching the gas flow direction in the air collecting pipe.

[0013] Furthermore, the switching unit includes: a threaded rod coaxially connected to the linkage gear; a threaded tube threadedly connected to the threaded rod; a piston fixedly mounted on the end of the threaded tube; a limiting tube sleeved on the threaded tube; a limiting groove opened in the limiting tube; a limiting bar slidably mounted in the limiting groove; and the limiting bar is fixedly connected to the threaded tube.

[0014] Furthermore, the liquid supply assembly includes: a liquid storage tank and a water storage tank fixedly mounted on the mounting frame; a liquid storage cylinder fixedly mounted on the mounting frame; and a suction unit for sucking the detergent in the liquid storage tank and the clean water in the water storage tank into the liquid storage cylinder.

[0015] Furthermore, the suction unit includes: a fixed tube fixedly mounted on the mounting frame; a sac fixedly mounted in the fixed tube; a liquid inlet pipe connecting the sac with the liquid storage tank and the water storage tank; a movable plate slidably mounted in the fixed tube; a movable frame fixedly connected to the movable plate; a power source 2 fixedly mounted on the liquid storage cylinder; a circular plate fixedly mounted on the output shaft of the power source 2; and a fixed rod fixedly mounted on the circular plate.

[0016] Furthermore, the movable frame is provided with a slide groove, and the fixed rod is slidably installed in the slide groove.

[0017] Furthermore, the liquid supply assembly also includes: a liquid guide tube connecting the sac and the liquid storage cylinder; a liquid outlet pipe connecting the liquid storage cylinder and the liquid spray head; and a second air outlet pipe connecting the air collecting pipe and the liquid storage cylinder.

[0018] Furthermore, the liquid supply assembly also includes: a stirring shaft rotatably mounted on the liquid storage cylinder; a stirring blade fixedly mounted on the stirring shaft; and the stirring shaft is fixedly connected to the output shaft of the second power source.

[0019] Furthermore, the pretreatment mechanism also includes: a reciprocating rack fixedly mounted on the movable frame; and a reciprocating gear meshingly connected to the reciprocating rack.

[0020] Furthermore, the fixing mechanism includes: a support frame; a first movable module that drives 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 movable module that drives the second rotating chuck; and a collection box fixedly installed on the support frame.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention relates to a device for testing the hardness of ductile iron parts. By adjusting the positions of a grinding plate and an adsorption cleaning body through an adjustment component, the device can, on the one hand, grind and clean different test locations on the surface of a tubular ductile iron part, thereby improving the flatness of the test location of the tubular ductile iron part and ensuring that the indenter of the hardness tester evenly contacts the surface of the tubular ductile iron part, thereby improving the accuracy of the test results. Furthermore, the device can clean oil stains from different test locations on the surface of the tubular ductile iron part, thereby improving the cleanliness of the test location of the tubular ductile iron part and further improving the accuracy of the test results.

[0023] 2. The present invention provides a hardness testing device for ductile iron parts. When a grinding plate is grinding the surface of a tubular ductile iron part, high-pressure gas ejected from a nozzle cleans waste chips generated during grinding. On the one hand, this prevents waste chips generated during grinding from accumulating on the surface of the tubular ductile iron part, which would otherwise scratch the surface of the tubular ductile iron part during grinding. This improves the cleanliness of the surface of the tubular ductile iron part, thereby enhancing the grinding effect. On the other hand, the ejected gas can dissipate heat from the grinding area of ​​the tubular ductile iron part, further enhancing the grinding effect.

[0024] 3. A device for testing the hardness of ductile iron castings of the present invention comprises a device for testing the hardness of ductile iron castings. A mixed liquid is sprayed onto the surface of a tubular ductile iron casting through a liquid spray head. The mixed liquid is then used in conjunction with an adsorbent cleaning body to wipe the tubular ductile iron casting, thereby improving the cleaning effect of oil stains on the surface of the tubular ductile iron casting. Furthermore, the mixed liquid and the adsorbent cleaning body can be used to wipe the tubular ductile iron casting, thereby removing waste chips that were not completely removed during grinding, thereby improving the cleanliness and flatness of the tubular ductile iron casting and ensuring the accuracy of hardness testing.

[0025] 4. The present invention provides a hardness testing device for ductile iron castings. When the second power source is started, it synchronously drives the stirring blade to rotate and the movable frame to reciprocate. On the one hand, it drives the capsule to compress and restore, thereby achieving a preliminary mixture of clean water and detergent and then delivering them to the liquid storage cylinder. On the other hand, it remixes the mixed liquid entering the liquid storage cylinder and simultaneously drives the air jet head and the liquid spray head to swing back and forth, thereby increasing the air jet range of the air jet head and the liquid spray range of the liquid spray head. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] Figure 1 This is a three-dimensional schematic diagram of a first movable module of a device for detecting hardness of ductile iron castings according to the present invention;

[0028] Figure 2 It is a three-dimensional schematic diagram of a hardness detection device for ductile iron castings according to the present invention;

[0029] Figure 3 This is a three-dimensional schematic diagram of a suction unit of a hardness testing device for ductile iron castings according to the present invention;

[0030] Figure 4 This is a schematic cross-sectional view of a fixed pipe of a hardness testing device for ductile iron castings according to the present invention;

[0031] Figure 5 A hardness detection device for ductile iron castings according to the present invention Figure 4 Enlarged view of point A in the middle;

[0032] Figure 6 A schematic cross-sectional view of a gas collecting pipe of a device for testing the hardness of ductile iron castings according to the present invention;

[0033] Figure 7 The present invention is a schematic cross-sectional view of a limit tube of a hardness detection device for ductile iron castings.

[0034] In the picture:

[0035] 1. Machine; 2. Mounting frame; 3. Hardness tester; 4. Pretreatment mechanism; 41. Grinding plate; 42. Adsorption cleaning body; 43. Adjustment assembly; 431. Fixing box; 432. Power source 1; 433. Linking rack; 434. Linking gear; 435. Guide rail; 44. Jet head; 45. Liquid spray head; 46. Air supply assembly; 461. Air pump; 462. Inlet pipe; 463. Gas collecting pipe; 464. Outlet pipe 1; 465. Switching unit; 4651. Threaded rod; 4652. Threaded pipe; 4653. Limiting pipe; 4654. Limiting strip; 4655. Piston; 47. Liquid supply assembly; 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, second power source; 4737, circular plate; 4738, fixed rod; 474, liquid storage cylinder; 475, stirring blade; 476, liquid outlet pipe; 477, liquid guide tube; 478, second air outlet pipe; 48, reciprocating rack; 49, reciprocating gear; 5, fixing mechanism; 51, support frame; 52, first rotating chuck; 53, second rotating chuck; 54, first movable module; 55, second movable module; 56, collecting box. DETAILED DESCRIPTION

[0036] In order to make the purpose, 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 only some embodiments of the present invention, not all embodiments.

[0037] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] like Figures 1 to 7As shown, the present invention provides a device for testing the hardness of ductile iron castings, comprising: a machine platform 1; a mounting frame 2 fixedly mounted on the machine platform 1; a hardness tester 3 fixedly mounted on the mounting frame 2; a fixing mechanism 5 for fixing the tubular ductile iron castings; and a pretreatment mechanism 4 for pretreatment of the tubular ductile iron castings before testing.

[0039] Hardness tester 3 is a common hardness testing equipment on the market.

[0040] The fixing mechanism 5 includes: a support frame 51; a first movable module 54 that drives the support frame 51 to move, and the first movable module 54 is fixedly installed on the machine 1; a first rotating chuck 52 is fixedly installed on the support frame 51; a second rotating chuck 53 is slidably installed on the support frame 51; a second movable module 55 that drives the second rotating chuck 53, and the second movable module 55 is installed on the support frame 51; and a collection box 56 is fixedly installed on the support frame 51.

[0041] Before testing, the tubular ductile iron casting needs to be fixed, that is, one end of the tubular ductile iron casting is clamped and fixed by the first rotating chuck 52, and the second movable module 55 is started to drive the second rotating chuck 53 to slide on the support frame 51, so that the position of the second rotating chuck 53 can be adjusted 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, thereby achieving rapid fixation of the tubular ductile iron casting.

[0042] It is supplemented here that the first rotating chuck 52 and the second rotating chuck 53 are both composed of an electric three-jaw chuck and a motor.

[0043] Starting the first rotating chuck 52 and the second rotating chuck 53 can drive the tubular ductile iron part to rotate circumferentially. By starting the first moving module 54, the support frame 51 can be driven to move, thereby driving the tubular ductile iron part to move axially, thereby facilitating the hardness tester 3 to perform hardness testing on different positions of the tubular ductile iron part, thereby improving the adaptability of the device.

[0044] Since hardness testing can be performed on different positions of the tubular ductile iron casting, multiple groups of test data can be obtained, and the average value of the multiple groups of data is calculated as the final test data of the tubular ductile iron casting, thereby improving the accuracy of the hardness test results of the tubular ductile iron casting.

[0045] In addition, the tubular ductile iron casting can be moved to the pretreatment mechanism 4 during pretreatment through the fixing mechanism 5. After the pretreatment is completed, the tubular ductile iron casting can be moved to the hardness tester 3 for testing.

[0046] The pretreatment mechanism 4 includes: a grinding plate 41; an adsorption cleaning body 42; an adjustment component 43 for adjusting the position of the grinding plate 41 and the adsorption cleaning body 42; the adjustment component 43 includes: a fixed box 431 fixedly mounted on the mounting frame 2; a linkage gear 434 rotatably mounted in the fixed box 431; a linkage rack 433 meshing with the linkage gear 434, and two linkage racks 433 are provided; a power source 1 432 for driving the linkage rack 433 to move, the power source 1 432 is fixedly mounted in the fixed box 431, and the linkage rack 433 adjacent to the movable end of the power source 1 432 is fixedly connected; a guide rail 435 for limiting the linkage rack 433, and the guide rail 435 is fixedly mounted in the fixed box 431; the grinding plate 41 and the adsorption cleaning body 42 are both fixedly connected to the linkage rack 433.

[0047] When pre-treating the tubular ductile iron casting, the adjacent linkage rack 433 is driven downward by starting the power source 1 432, thereby driving the grinding plate 41 to move downward and driving the linkage gear 434 to rotate. The linkage gear 434 drives another 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 tubular ductile iron casting, thereby first grinding the surface of the tubular ductile iron casting to make its surface smooth.

[0048] At this time, the fixing mechanism 5 can be started, which can drive the tubular ductile iron part to rotate circumferentially and move axially, so that different inspection locations on the surface of the tubular ductile iron part can be polished and cleaned, thereby improving the flatness of the inspection location of the tubular ductile iron part, so that the indenter of the hardness tester 3 can evenly contact the surface of the tubular ductile iron part, thereby improving the accuracy of the test results.

[0049] When the dust cleaning of the tubular ductile iron casting is completed, the power source 432 is started to drive the interlocking rack 433 to move upward, thereby driving the grinding plate 41 to move upward, and the other interlocking rack 433 drives the adsorption cleaning body 42 to move downward, so that the adsorption cleaning body 42 abuts against the surface of the tubular ductile iron casting.

[0050] At this time, the fixing mechanism 5 can be started, which can drive the tubular ductile iron part to rotate circumferentially and move axially, so that the oil stains at different inspection locations on the surface of the tubular ductile iron part can be cleaned, thereby improving the cleanliness of the inspection locations of the tubular ductile iron part, avoiding the problem that the presence of oil stains will change the friction coefficient and lubrication state of the surface of the tubular ductile iron part, thereby affecting the penetration depth of the indenter of the hardness tester 3 into the surface of the tubular ductile iron part, thereby further improving the accuracy of the test results.

[0051] In the present invention, the position of the grinding plate 41 and the adsorption cleaning body 42 is adjusted by adjusting the component 43. On the one hand, it is possible to grind and clean different inspection locations on the surface of the tubular ductile iron part, thereby improving the flatness of the inspection location of the tubular ductile iron part, so that the pressure head of the hardness tester 3 is in uniform contact with the surface of the tubular ductile iron part, thereby improving the accuracy of the test results; on the other hand, it is possible to clean oil stains at different inspection locations on the surface of the tubular ductile iron part, thereby improving the cleanliness of the inspection location of the tubular ductile iron part, and avoiding the problem that the presence of oil stains will change the friction coefficient and lubrication state of the surface of the tubular ductile iron part, thereby affecting the depth of penetration of the pressure head of the hardness tester 3 into the surface of the tubular ductile iron part, thereby further improving the accuracy of the test results.

[0052] It should be added that the power source 432 is preferably a cylinder; the adsorption cleaning body 42 is preferably a sponge.

[0053] The pretreatment mechanism 4 also includes: a nozzle head 44 and a liquid spray head 45 rotatably mounted on the fixed box 431; an air supply assembly 46 for supplying air to the nozzle head 44; a liquid supply assembly 47 for supplying liquid to the liquid spray head 45; the air supply assembly 46 includes: an air pump 461 fixedly mounted on the mounting frame 2; a gas collecting pipe 463 fixedly mounted 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 464 connecting the gas collecting pipe 463 and the nozzle head 44; and a switching unit 465 for switching the gas flow direction in the gas collecting pipe 463.

[0054] 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 to the linkage gear 434; a threaded tube 4652 threadedly connected to the threaded rod 4651; a piston 4655 fixedly installed on the end of the threaded tube 4652; a limiting tube 4653 sleeved on the threaded tube 4652, and the limiting tube 4653 is fixedly installed on the fixed box 431; a limiting groove opened in the limiting tube 4653; a limiting bar 4654 slidably installed in the limiting groove; and the limiting bar 4654 is fixedly connected to the threaded tube 4652.

[0055] That is, the linkage gear 434 drives the threaded rod 4651 to rotate, and the threaded rod 4651 drives the threaded tube 4652 to move. Through the cooperation between the limiting tube 4653 and the limiting bar 4654, the threaded tube 4652 can be limited, so that the threaded tube 4652 moves along the axial direction of the threaded rod 4651, and then drives the piston 4655 to slide in the air collecting pipe 463 along the axial direction of the threaded rod 4651.

[0056] When the grinding plate 41 moves downward and abuts against the tubular ductile iron part, the piston 4655 moves between the outlet end of the inlet pipe 462 and the inlet end of the outlet pipe 2 478, thereby separating the outlet end of the inlet pipe 462 from the inlet end of the outlet pipe 2 478. At this time, the gas generated by starting the air pump 461 enters the gas collecting pipe 463 through the inlet pipe 462 and is transported to the nozzle 44 through the outlet pipe 1 464. The high-pressure gas ejected from the nozzle 44 can clean up the waste chips generated during grinding, and the blown-off waste chips fall into the collection box 56 for collection.

[0057] In the present invention, while the grinding plate 41 is grinding the surface of the tubular ductile iron part, the high-pressure gas ejected from the nozzle 44 cleans the waste chips generated during grinding. On the one hand, it prevents the waste chips generated during grinding from accumulating on the surface of the tubular ductile iron part, causing the waste chips to scratch the surface of the tubular ductile iron part during grinding, thereby improving the cleanliness of the surface of the tubular ductile iron part and thus improving the grinding effect; on the other hand, the ejected gas can dissipate heat from the grinding part of the tubular ductile iron part, thereby further improving the grinding effect.

[0058] Although the grease on the surface of the tubular ductile iron casting can be cleaned by wiping the surface of the tubular ductile iron casting with the adsorption cleaning body 42, stubborn grease cannot be completely removed by wiping alone.

[0059] The liquid supply assembly 47 includes: a liquid storage tank 472 and a water storage tank 471 fixedly mounted on the mounting frame 2; a liquid storage cylinder 474 fixedly mounted on the mounting frame 2; a suction unit 473 for sucking the detergent in the liquid storage tank 472 and the clean water in the water storage tank 471 into the liquid storage cylinder 474; the suction unit 473 includes: a fixed pipe 4733 fixedly mounted on the mounting frame 2; a capsule 4732 fixedly mounted in the fixed pipe 4733; a liquid inlet pipe 4731 connecting the capsule 4732 with the liquid storage tank 472 and the water storage tank 471; a movable plate 4734 slidably mounted in the fixed pipe 4733, and the movable plate 4734 and the capsule 4732 are connected. 732 is fixedly connected; a movable frame 4735 is fixedly connected to the movable plate 4734; a power source 2 4736 is fixedly mounted on the liquid storage cylinder 474; a circular plate 4737 is fixedly mounted on the output shaft of the power source 2 4736; a fixed rod 4738 is fixedly mounted on the circular plate 4737; the movable frame 4735 is provided with a slide groove, and the fixed rod 4738 is slidably mounted in the slide groove; the liquid supply component 47 also includes: a liquid guide tube 477 connecting the sac body 4732 and the liquid storage cylinder 474; a liquid outlet pipe 476 connecting the liquid storage cylinder 474 and the liquid spray head 45; and an air outlet pipe 2 478 connecting the air collecting pipe 463 and the liquid storage cylinder 474.

[0060] When the grinding is completed, the grinding plate 41 is driven to move upward through the adjustment component 43, and the adsorption cleaning body 42 is brought into contact with the surface of the tubular ductile iron casting. At this time, the air pump 461 and the power source 2 4736 are started. By starting the power source 2 4736, the circular plate 4737 can be driven to rotate, and the circular plate 4737 drives the fixed rod 4738 to rotate. The fixed rod 4738 slides in the slide groove, so that the movable frame 4735 moves back and forth along the axial direction of the liquid storage cylinder 474, thereby driving the movable plate 4734 to slide in the liquid storage cylinder 474, and driving the capsule 4732 to reciprocate and compress and restore.

[0061] The two liquid inlet ends of the liquid inlet pipe 4731 are respectively connected to the liquid storage tank 472 and the water storage tank 471, and the liquid outlet end of the liquid inlet pipe 4731 is connected to the capsule 4732. Both liquid inlet ends of the liquid inlet pipe 4731 are installed with a first one-way valve, and the liquid outlet end of the liquid guide tube 477 is installed with a second one-way valve.

[0062] The liquid storage tank 472 stores detergent, and the water storage tank 471 stores clean water. When in use, the detergent and clean water are sucked out and mixed into a mixed liquid for use. Since the detergent and clean water are stored separately, the storage time of the detergent and clean water can be increased, avoiding premature mixing and resulting in waste of unused mixed liquid.

[0063] When the capsule 4732 is restored, suction is generated. At this time, the first one-way valve opens and the second one-way valve closes. At this time, the detergent and clean water are sucked out separately and enter the capsule 4732. Since the detergent and clean water pass through the liquid outlet end of the same liquid inlet pipe 4731, the detergent and clean water entering the capsule 4732 are preliminarily mixed.

[0064] When the capsule 4732 is compressed, the mixed liquid can be squeezed. At this time, the first one-way valve is closed and the second one-way valve is opened. The mixed liquid is squeezed and enters the liquid storage cylinder 474 to prepare for subsequent use.

[0065] In the present invention, the compression and recovery of the capsule 4732 can, on the one hand, preliminarily mix the detergent and the clean water, and on the other hand, transport the mixed liquid to the liquid storage cylinder 474.

[0066] As the adsorption cleaning body 42 moves downward and abuts against the tubular ductile iron part, the piston 4655 moves between the outlet end of the inlet pipe 462 and the inlet end of the outlet pipe 464, thereby separating the outlet end of the inlet pipe 462 from the inlet end of the outlet pipe 464. At this time, the gas generated by starting the air pump 461 enters the gas collecting pipe 463 through the inlet pipe 462 and is transported to the liquid storage cylinder 474 through the outlet pipe 2 478. At this time, the high-pressure gas entering the liquid storage cylinder 474 can perform air stirring on the mixed liquid in the liquid storage cylinder 474, thereby realizing secondary mixing and further improving the uniformity of the mixed liquid.

[0067] Moreover, when the high-pressure gas entering the liquid storage cylinder 474 reaches a certain amount, the mixed liquid in the liquid storage cylinder 474 is affected by the gas pressure and enters the liquid spray head 45 through the liquid outlet pipe 476 to be sprayed out.

[0068] In the present invention, the mixed liquid is sprayed onto the surface of the tubular ductile iron casting through the liquid spray head 45, and the tubular ductile iron casting is wiped with the adsorption cleaning body 42, thereby improving the cleaning effect of the oil stains on the surface of the tubular ductile iron casting.

[0069] In addition, by wiping the tubular ductile iron casting with the mixed liquid and the adsorption cleaning body 42, waste chips that were not completely removed during grinding can be wiped away, thereby improving the cleanliness and flatness of the tubular ductile iron casting and ensuring the accuracy of hardness testing.

[0070] It should be added here that the power source 2 4736 is preferably a dual-axis motor.

[0071] In the present invention, by setting the switching unit 465, the flow direction of the high-pressure gas generated by the air pump 461 can be switched according to the usage status of the grinding plate 41 and the adsorption cleaning body 42. When the grinding plate 41 grinds the tubular ductile iron parts, the high-pressure gas flows to the nozzle head 44, thereby cleaning the waste chips generated during grinding. When the adsorption cleaning body 42 wipes the tubular ductile iron parts, the high-pressure gas flows to the liquid storage cylinder 474, and while the mixed liquid in the liquid storage cylinder 474 is stirred by air, the liquid storage cylinder 474 is pressurized, so that the mixed liquid is transported to the liquid spray head 45 under the action of air pressure and sprayed on the surface of the tubular ductile iron parts, thereby improving the cleaning effect of oil stains on the surface of the tubular ductile iron parts.

[0072] The liquid supply assembly 47 also includes: a stirring shaft rotatably mounted on the liquid storage cylinder 474; a stirring blade 475 fixedly mounted on the stirring shaft; and the stirring shaft is fixedly connected to the output shaft of the second power source 4736.

[0073] When the power source 2 4736 is started, it can drive the stirring shaft to rotate, and the stirring shaft drives the stirring blade 475 to rotate, so that the mixed liquid in the liquid storage cylinder 474 can be mixed three times, thereby further improving the uniformity of the mixed liquid and further improving the cleaning effect of oil stains.

[0074] The pretreatment mechanism 4 also includes: a reciprocating rack 48 fixedly mounted on the movable frame 4735; a reciprocating gear 49 meshingly connected to the reciprocating rack 48, two reciprocating gears 49 are provided, and the two reciprocating gears 49 are respectively fixedly mounted on the jet head 44 and the liquid spray head 45; the movable frame 4735 is slidably mounted on the fixed box 431.

[0075] When the movable frame 4735 moves back and forth, it can drive the reciprocating rack 48 to move back and forth, and the reciprocating rack 48 drives the reciprocating gear 49 to rotate back and forth, thereby driving the jet head 44 and the liquid spray head 45 to swing back and forth, thereby increasing the jet range of the 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.

[0076] In the present invention, when the second power source 4736 is started, it synchronously drives the stirring blade 475 to rotate and the movable frame 4735 to move back and forth. On the one hand, it drives the capsule 4732 to compress and restore, so that the clean water and detergent are initially mixed and then transported to the liquid storage cylinder 474. On the other hand, the mixed liquid entering the liquid storage cylinder 474 is mixed again, and at the same time, it can drive the jet head 44 and the liquid spray head 45 to swing back and forth, thereby increasing the jet range of the jet head 44 and the liquid spray range of the liquid spray head 45.

[0077] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0078] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A hardness detection device for ductile iron castings, characterized in that: include: A machine platform (1); a mounting frame (2) fixedly mounted on the machine platform (1); a hardness tester (3) fixedly mounted on the mounting frame (2); a fixing mechanism (5) for fixing the tubular ductile iron casting; a pre-treatment mechanism (4) for pre-treating the tubular ductile iron casting before testing; The pretreatment mechanism (4) comprises: a grinding plate (41); an adsorption cleaning body (42); and an adjustment component (43) for adjusting the positions of the grinding plate (41) and the adsorption cleaning body (42). The adjustment assembly (43) comprises: a fixed box (431) fixedly mounted on the mounting frame (2); a linkage gear (434) rotatably mounted in the fixed box (431); a linkage rack (433) meshingly connected to the linkage gear (434); a power source (432) for driving the linkage rack (433) to move; a guide rail (435) for limiting the position of the linkage rack (433); the polishing plate (41) and the adsorption cleaning body (42) are both fixedly connected to the linkage rack (433); The pretreatment mechanism (4) further comprises: an air jet head (44) and a liquid jet head (45) rotatably mounted on the fixed box (431); an air supply assembly (46) for supplying air to the air jet head (44); and a liquid supply assembly (47) for supplying liquid to the liquid jet head (45). The air supply assembly (46) includes: an air pump (461) fixedly mounted on the mounting frame (2); an air collecting pipe (463) fixedly mounted on the fixed box (431); an air inlet pipe (462) connecting the air pump (461) and the air collecting pipe (463); an air outlet pipe (464) connecting the air collecting pipe (463) and the nozzle (44); and a switching unit (465) for switching the flow direction of gas in the air collecting pipe (463). The switching unit (465) comprises: a threaded rod (4651) coaxially connected to the linkage gear (434); a threaded tube (4652) threadedly connected to the threaded rod (4651); a piston (4655) fixedly mounted on the end of the threaded tube (4652); a limiting tube (4653) sleeved and mounted on the threaded tube (4652); a limiting groove provided in the limiting tube (4653); a limiting bar (4654) slidably mounted in the limiting groove; and the limiting bar (4654) is fixedly connected to the threaded tube (4652).

2. A hardness detection device for ductile iron castings according to claim 1, characterized in that: The liquid supply assembly (47) comprises: a liquid storage tank (472) and a water storage tank (471) fixedly mounted on the mounting frame (2); a liquid storage cylinder (474) fixedly mounted on the mounting frame (2); and a suction unit (473) for sucking the detergent in the liquid storage tank (472) and the clean water in the water storage tank (471) into the liquid storage cylinder (474).

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

4. A hardness detection device for ductile iron castings according to claim 3, characterized in that: The movable frame (4735) is provided with a slide groove, and the fixed rod (4738) is slidably installed in the slide groove.

5. A hardness detection device for ductile iron castings according to claim 3, characterized in that: The liquid supply assembly (47) further includes: a liquid guide tube (477) connecting the sac (4732) and the liquid storage cylinder (474); a liquid outlet pipe (476) connecting the liquid storage cylinder (474) and the liquid spray head (45); and a second air outlet pipe (478) connecting the air collecting pipe (463) and the liquid storage cylinder (474).

6. A device for detecting hardness of ductile iron castings according to claim 3, characterized in that: The liquid supply assembly (47) further includes: a stirring shaft rotatably mounted on the liquid storage cylinder (474); a stirring blade (475) fixedly mounted on the stirring shaft; and the stirring shaft is fixedly connected to the output shaft of the second power source (4736).

7. A device for detecting hardness of ductile iron castings according to claim 3, characterized in that: The pre-treatment mechanism (4) further comprises: a reciprocating rack (48) fixedly mounted on the movable frame (4735); and a reciprocating gear (49) meshingly connected to the reciprocating rack (48).

8. A device for detecting hardness of ductile iron castings as claimed in claim 1, characterized in that: The fixing mechanism (5) comprises: a support frame (51); a first movable module (54) for driving the support frame (51) to move; a first rotating chuck (52) fixedly mounted on the support frame (51); a second rotating chuck (53) slidably mounted on the support frame (51); a second movable module (55) for driving the second rotating chuck (53); and a collection box (56) fixedly mounted on the support frame (51).

Images