Automatic hardness testing machine for wheel hub after heat treatment

Abstract

The present invention relates to the technical field of wheel hub hardness detection, and discloses an automatic hardness detection machine for wheel hub after heat treatment, comprising: a detection table, on which guide rails, support rods and hydraulic guide rails are fixedly installed in parallel, and a positioning base is slidably installed between the guide rails, a movable support is fixed at the bottom of the positioning base, and the movable support is slidably connected with the hydraulic guide rail; and also comprising: a movable base, which is movably installed in the top groove of the positioning base, and a support table is fixed through the top center of the movable base, a hydraulic push rod is installed on the side of the support table, and a support pad is fixedly connected to the end of the output shaft of the hydraulic push rod, and a motor gear assembly is installed on the side of the positioning base, and the motor gear assembly drives the movable base to rotate. The automatic hardness detection machine for wheel hub after heat treatment can realize the rapid release of stress of wheel hub heat treatment, improve the accuracy of the wheel hub hardness detection value, and facilitate the improvement of the efficiency and stability of wheel hub hardness detection.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub hardness detection, in particular to an automatic hardness detection machine for wheel hubs after heat treatment. Background Art

[0002] The wheel hub is an important component of modern transportation vehicles. The wheel hub is used to locate the bottom of the transportation vehicle and assist in movement. During the production and preparation process of the wheel hub, in order to ensure the strength of the overall component and its ability to withstand external loads, it is necessary to carry out hardness testing after casting or forging. Especially after the heat treatment of the wheel hub by quenching and tempering, in order to ensure the high-strength characteristics of the wheel hub when in use, for the heat-treated wheel hub component, it is necessary to use a hardness testing machine to test and screen its strength after heat treatment.

[0003] The existing wheel hub hardness testing machine generally uses a transmission component such as a conveyor belt to continuously transport the wheel hub in a production line, and uses the detection probe of the hardness testing machine to realize the automatic inspection of the wheel hub during the transportation process. However, in actual use, the wheel hub is in a relatively static state during the continuous transportation process, and the overall components will not move or collide. Since the relative static state of the wheel hub is constant, the positions of each component maintain a relative static balance, and the hardness value directly measured will be biased and mismeasured;

[0004] During the hardness test, the wheel hub has not undergone dynamic processing and stress adjustment, and the stress of the wheel hub after heat treatment has not been completely released, resulting in a large error in the detection value during the wheel hub detection process. Therefore, it is necessary to release the wheel hub stress before hardness testing, resulting in the wheel hub not being able to be used in the hardness testing process in time after heat treatment, and the wheel hub hardness test value error is large.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original wheel hardness testing machine. Summary of the invention

[0006] The purpose of the present invention is to provide an automated hardness testing machine for wheel hubs after heat treatment, so as to solve the problem that the existing hardness testing machine proposed in the above background technology requires stress release of the wheel hub before hardness testing, resulting in the wheel hub being unable to be used in the hardness testing process in time after heat treatment, and at the same time, the numerical error of the wheel hub hardness testing is large.

[0007] To achieve the above object, the present invention provides the following technical solution: an automatic hardness testing machine for wheel hub after heat treatment, comprising:

[0008] The testing table has guide rails, support rods and hydraulic guide rails fixedly installed in parallel, and a positioning base is slidably installed between the guide rails, a movable support is fixed at the bottom of the positioning base, and the movable support is slidably connected to the hydraulic guide rail;

[0009] It also includes: a movable base, which is movably installed in the top groove of the positioning base, and a support platform is fixed on the top center of the movable base, a hydraulic push rod is installed on the side of the support platform, and the end of the hydraulic push rod output shaft is fixedly connected to a support pad, a motor gear assembly is installed on the side of the positioning base, and the motor gear assembly drives the movable base to rotate, the movable support is connected with the support platform and the hydraulic push rod, and an external hydraulic conduit is installed on the movable support;

[0010] The pressure-applying assembly and the detection head are respectively arranged on the left and right sides of the middle of the detection platform, and the pressure-applying assembly and the detection head are driven by a hydraulic assembly.

[0011] Preferably, the movable base and the movable support form a relative rotation structure, and a ball bearing is provided at the rotation connection between the movable base and the movable support, and a gear assembly meshing with the motor gear assembly is provided at the edge of the top outer wall of the movable base.

[0012] Preferably, the hydraulic push rods are evenly distributed at equal angles on the side walls of the support platform, and a rubber pad for supporting the wheel hub is provided on the top of the support platform, and the diameter of the rubber pad is larger than the diameter of the support platform.

[0013] Preferably, a fitting relative rotation structure is formed between the movable support and the support platform, and the movable support is connected to the inside of the support platform, and the movable support realizes hydraulic regulation of the oil inside the hydraulic push rod through an external hydraulic conduit.

[0014] Preferably, the movable support has a double-layer structure, the inner layer of which is a rubber hose and the outer layer is an outer elastic tube, an inner supporting liquid bag is distributed between the rubber hose and the outer elastic tube, and a channel connected to the external hydraulic conduit on the movable support is provided at the bottom of the inner supporting liquid bag.

[0015] Preferably, the inner supporting liquid capsule is embedded between the rubber hose and the outer elastic tube, and the inner supporting liquid capsule is distributed at equal angles, and the central axis of the inner supporting liquid capsule is parallel to the vertical central axis of the movable support.

[0016] Preferably, the outer wall of the hydraulic push rod is provided with a first hydraulic pipe and a second hydraulic pipe, a push plug rod is movably installed between the middle parts of the first hydraulic pipe and the second hydraulic pipe, and an electromagnetic valve is provided between the first hydraulic pipe and the inside of the hydraulic push rod, the pipe end of the second hydraulic pipe is connected to the outer wall of the end of the output shaft of the hydraulic push rod, and a rubber lining is fixed inside the support pad.

[0017] Preferably, the first hydraulic pipe and the second hydraulic pipe are coaxially distributed transversely, and the inner walls of the first hydraulic pipe and the second hydraulic pipe respectively form a sealing and fitting sliding connection with the left and right ends of the push plug rod.

[0018] Preferably, the solenoid valve realizes the connection between the first hydraulic pipe and the inside of the hydraulic push rod, and the lower connecting port of the solenoid valve is located on the left side of the inner end of the hydraulic push rod output shaft, and the upper connecting port of the solenoid valve is located on the right side of the left end of the push plug rod.

[0019] Preferably, the middle portion of the support pad is concave, the rubber lining is located in the middle concave groove of the support pad, and the middle concave bottom of the support pad is connected to the inside of the second hydraulic pipe.

[0020] Compared with the prior art, the invention has the following beneficial effects: the automatic hardness testing machine for wheel hub after heat treatment can realize the rapid release of stress of wheel hub heat treatment, improve the accuracy of wheel hub hardness testing value, and facilitate the improvement of wheel hub hardness testing efficiency and stability. The specific contents are as follows:

[0021] 1. The wheel hub can be positioned by installing the movable base and the hydraulic push rod on it, so that the wheel hub can simulate walking movement and external force collision to release stress before the hardness test after heat treatment. At the same time, this process will not cause the wheel hub to loosen during movement, thereby improving the stability and efficiency of the wheel hub during hardness testing;

[0022] Furthermore, while the wheel hub is positioned by applying pressure to the inner and outer sides of the wheel hub by the hydraulic push rod, the push rod on the outer side of the hydraulic push rod can also be moved and changed in position by the oil pressure, and the air pressure inside the first hydraulic pipe can be used to change the air pressure inside the second hydraulic pipe, so that the inner and outer pressure positioning of the wheel hub and the adsorption positioning effect can be achieved through the action of the internal air pressure of the second hydraulic pipe and the rubber lining in the support pad, so that the wheel hub will not be positioned loose during the subsequent stress release process;

[0023] 2. An elastic mobile support is provided for use. The mobile support drives the positioning base to move and change its position through a hydraulic guide rail. When the positioning base needs to be positioned, the external hydraulic conduit on the mobile support is used to adjust the internal pressure of the hydraulic push rod. At the same time, the hydraulic action can be used to cause the pressure coefficient of the internal supporting liquid bag between the rubber hose and the outer elastic tube to expand, so that the mobile support is changed from an elastic active state to an expanded and tense state. Under the action of the upward push-type external pressure, the positioning base is firmly positioned on the support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the front structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the side structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the connection structure between the hydraulic guide rail and the movable support of the present invention;

[0027] Figure 4 This is a schematic diagram of the upward-looking structure of the positioning base installation of the present invention;

[0028] Figure 5 This is a schematic diagram of the top view of the positioning base installation structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the installation structure of the movable base of the present invention;

[0030] Figure 7 This is a schematic diagram of the roller distribution structure on the movable base of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the movable support of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the hydraulic push rod of the present invention;

[0033] Fig.10 This is a schematic diagram of the installation structure of the push plug rod of the present invention;

[0034] Fig.11 This is a schematic diagram of the rubber liner installation structure of the present invention.

[0035] In the figure: 1. test table; 2. guide rail; 3. support rod; 4. positioning base; 5. hydraulic guide rail; 6. movable support; 601. rubber hose; 602. outer elastic tube; 603. inner support liquid bag; 7. movable base; 8. support table; 9. hydraulic push rod; 901. first hydraulic pipe; 902. second hydraulic pipe; 903. push plug rod; 904. solenoid valve; 905. rubber lining; 10. support pad; 11. motor gear assembly; 12. pressure assembly; 13. test head. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1-Figure 11 The present invention provides a technical solution: an automatic hardness testing machine for wheel hub after heat treatment, comprising: a testing table 1, on which a guide rail 2, a support rod 3 and a hydraulic guide rail 5 are fixedly installed in parallel, and a positioning base 4 is slidably installed between the guide rails 2, and a movable support 6 is fixed at the bottom of the positioning base 4, and the movable support 6 is slidably connected to the hydraulic guide rail 5;

[0038] In the above technical solution, the wheel hub to be tested after heat treatment is received by the positioning base 4, and the guide rail 2, the support rod 3 and the hydraulic guide rail 5 are used to drive the movable support 6 and the positioning base 4 thereon to move and change the position, so as to adjust the position of the wheel hub, so as to facilitate the subsequent stress release and hardness test of the wheel hub;

[0039] It also includes: a movable base 7, which is movably installed in the top groove of the positioning base 4, and a support platform 8 is fixed on the top center of the movable base 7, a hydraulic push rod 9 is installed on the side of the support platform 8, and a support pad 10 is fixedly connected to the end of the output shaft of the hydraulic push rod 9, a motor gear assembly 11 is installed on the side of the positioning base 4, the motor gear assembly 11 drives the movable base 7 to rotate, the movable support 6 is connected with the support platform 8 and the hydraulic push rod 9, and an external hydraulic conduit is installed on the movable support 6; a fitting relative rotation structure is formed between the movable support 6 and the support platform 8, and the movable support 6 is connected with the inside of the support platform 8, and the movable support 6 realizes hydraulic adjustment of the oil inside the hydraulic push rod 9 through the external hydraulic conduit;

[0040] The movable support 6 is provided with a double-layer structure, wherein the inner layer is a rubber hose 601, and the outer layer is an outer elastic tube 602. An inner support liquid capsule 603 is distributed between the rubber hose 601 and the outer elastic tube 602. A hole connected to the external hydraulic conduit on the movable support 6 is provided at the bottom of the inner support liquid capsule 603. The inner support liquid capsule 603 is embedded and installed between the rubber hose 601 and the outer elastic tube 602, and the inner support liquid capsule 603 is distributed at equal angles, and the central axis of the inner support liquid capsule 603 is distributed parallel to the vertical central axis of the movable support 6.

[0041] In the above technical solution, if Figure 4 and Figure 8 As shown, when the hydraulic guide rail 5 drives the positioning base 4 to move through the mobile support 6, since the mobile support 6 is composed of an elastic rubber hose 601 and an outer elastic tube 602, during the movement of the mobile support 6, no shear damage or breakage will occur in the middle due to shear force. At the same time, when the mobile support 6 and the positioning base 4 stop moving, in order to improve the stability of the wheel hub installation on the positioning base 4, the external hydraulic conduit and external hydraulic components on the mobile support 6 can be used to adjust the oil pressure inside the mobile support 6. In this process, the oil pressure The force causes the oil to be introduced into the inner supporting liquid bag 603, causing the inner supporting liquid bag 603 to swell and expand. The elastic relaxation state of the movable support 6 composed of the rubber hose 601 and the outer elastic tube 602 is transformed into a tight expansion state, and an external pressure pushing up the bottom is applied to the positioning base 4. Under the action of the support rod 3 on the bottom positioning state of the positioning base 4, the overall movement and positioning effect of the positioning base 4 is achieved under the action of hydraulic pressure, which effectively avoids the loosening and falling of the hub due to the unstable positioning of the positioning base 4 during the subsequent stress release of the hub on the positioning base 4.

[0042] At the same time, this technical solution also discloses a hub positioning reinforcement structure, the specific contents of which are as follows:

[0043] The outer wall of the hydraulic push rod 9 is provided with a first hydraulic pipe 901 and a second hydraulic pipe 902, a push plug rod 903 is movably installed between the middle parts of the first hydraulic pipe 901 and the second hydraulic pipe 902, and a solenoid valve 904 is provided between the first hydraulic pipe 901 and the inside of the hydraulic push rod 9, the pipe end of the second hydraulic pipe 902 is connected to the outer wall of the output shaft end of the hydraulic push rod 9, and a rubber lining 905 is fixed inside the support pad 10; the first hydraulic pipe 901 and the second hydraulic pipe 902 are coaxially distributed in the transverse direction, and the first hydraulic pipe 901 and the second hydraulic pipe The inner wall of 902 forms a sealing and fitting sliding connection with the left and right ends of the push plug rod 903 respectively; the solenoid valve 904 realizes the connection between the first hydraulic pipe 901 and the inside of the hydraulic push rod 9, and the lower connecting port of the solenoid valve 904 is located on the left side of the inner end of the output shaft of the hydraulic push rod 9, and the upper connecting port of the solenoid valve 904 is located on the right side of the left end of the push plug rod 903; the middle part of the support cushion block 10 is concave, and the rubber lining 905 is located in the middle concave groove of the support cushion block 10, and the middle concave bottom of the support cushion block 10 is connected with the inside of the second hydraulic pipe 902;

[0044] In the above technical solution, if Figure 6 and Figure 9-11 As shown, when the oil pressure inside the movable support 6 is adjusted by the external hydraulic conduit, the oil pressure is synchronously introduced into the hydraulic push rod 9. After the hydraulic push rod 9 is extended to provide external pressure to the inner side of the wheel hub for extrusion support positioning, the oil is introduced into the first hydraulic pipe 901 through the opening of the solenoid valve 904 and the continuous introduction of oil pressure. Under the action of the oil pressure, the plug rod 903 is pushed to move axially in the first hydraulic pipe 901, and the plug rod 903 is pushed to form gas extraction inside the second hydraulic pipe 902 during the movement, so that the second hydraulic pipe 902 generates internal negative pressure. Under the synchronous action of the second hydraulic pipe 902 and the rubber lining 905, when the hydraulic push rod 9 provides external pressure positioning to the inner side of the wheel hub, negative pressure adsorption positioning of the inner side of the wheel hub can also be achieved, so that the wheel hub positioning is more stable and will not be unstable during subsequent stress release and hardness testing.

[0045] In addition to the above technical solutions, the present technical solution also discloses that the movable base 7 and the movable support 6 constitute a relative rotation structure, and a ball is provided at the rotation connection between the movable base 7 and the movable support 6, and a gear assembly meshing with the motor gear assembly 11 is provided at the edge of the top outer wall of the movable base 7; the hydraulic push rods 9 are evenly distributed at equal angles on the side wall of the support platform 8, and a rubber pad supporting the wheel hub is provided on the top of the support platform 8, and the diameter of the rubber pad is larger than the diameter of the support platform 8; the pressure assembly 12 and the detection head 13 are respectively arranged on the left and right sides of the middle of the detection platform 1, and the pressure assembly 12 and the detection head 13 are driven by the hydraulic assembly;

[0046] In the above technical solution, if Figure 1-Figure 3 As shown, the wheel hub is positioned, and the motor gear assembly 11 drives the movable base 7 and the wheel hub thereon to rotate at high speed. During the rotation, the hydraulic assembly is used to drive the pressure-applying assembly 12 to move, and the pressure-applying assembly 12 releases pressure or impacts the outer wall of the wheel hub to achieve the effect of releasing the stress of the wheel hub. At the same time, when the wheel hub is rotating slowly, the detection head 13 is controlled to move by the hydraulic assembly to achieve automatic detection of the hardness of the wheel hub.

[0047] Embodiment 2: Based on Embodiment 1, this embodiment further discloses the components of the pressure component 12. The pressure component 12 can be a plate-like component made of different materials or an impact head component for impact, etc. It is assembled to the end of the output shaft of the hydraulic component by bolt installation. The pressure component 12 applies side pressure to the wheel hub during rotation to simulate the external force bearing during the driving process of the wheel hub. At the same time, the wheel hub can also be impacted during rotation to improve the efficiency of subsequent wheel hub hardness detection.

[0048] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Automatic hardness testing machine for wheel hub after heat treatment, including: A testing table (1) on which a guide rail (2), a support rod (3) and a hydraulic guide rail (5) are fixedly installed in parallel, and a positioning base (4) is slidably installed between the guide rails (2), a movable support (6) is fixed at the bottom of the positioning base (4), and the movable support (6) is slidably connected to the hydraulic guide rail (5); It is characterized by further comprising: A movable base (7) is movably mounted in the top groove of the positioning base (4), and a support platform (8) is fixedly mounted on the top center of the movable base (7), a hydraulic push rod (9) is mounted on the side of the support platform (8), and a support pad (10) is fixedly connected to the end of the output shaft of the hydraulic push rod (9), a motor gear assembly (11) is mounted on the side of the positioning base (4), and the motor gear assembly (11) drives the movable base (7) to rotate, the movable support (6) is connected to the inside of the support platform (8) and the hydraulic push rod (9), and an external hydraulic conduit is mounted on the movable support (6); The movable support (6) and the support platform (8) form a fitting relative rotation structure, and the movable support (6) and the support platform (8) are internally connected, and the movable support (6) realizes hydraulic adjustment of the oil inside the hydraulic push rod (9) through an external hydraulic conduit; the movable support (6) is arranged with a double-layer structure, wherein the inner layer is a rubber hose (601), and the outer layer is an outer elastic tube (602); an inner support liquid capsule (603) is distributed between the rubber hose (601) and the outer elastic tube (602), and a hole communicating with the external hydraulic conduit on the movable support (6) is arranged at the bottom of the inner support liquid capsule (603); the inner support liquid capsule (603) is embedded and installed between the rubber hose (601) and the outer elastic tube (602), and the inner support liquid capsule (603) is distributed at equal angles, and the central axis of the inner support liquid capsule (603) is distributed parallel to the vertical central axis of the movable support (6); The hydraulic push rods (9) are evenly distributed at equal angles on the side wall of the support platform (8), and a rubber pad for supporting the wheel hub is provided on the top of the support platform (8), wherein the diameter of the rubber pad is greater than the diameter of the support platform (8); The outer wall of the hydraulic push rod (9) is provided with a first hydraulic pipe (901) and a second hydraulic pipe (902); a push plug rod (903) is movably installed between the middle parts of the first hydraulic pipe (901) and the second hydraulic pipe (902); a solenoid valve (904) is provided between the first hydraulic pipe (901) and the inside of the hydraulic push rod (9); the pipe end of the second hydraulic pipe (902) is connected to the outer wall of the end of the output shaft of the hydraulic push rod (9); and a rubber lining (905) is fixed inside the support pad (10); the first hydraulic The first hydraulic pipe (901) and the second hydraulic pipe (902) are coaxially distributed in the transverse direction, and the inner walls of the first hydraulic pipe (901) and the second hydraulic pipe (902) respectively form a sealing and fitting sliding connection with the left and right ends of the push plug rod (903); the solenoid valve (904) realizes the connection between the first hydraulic pipe (901) and the inside of the hydraulic push rod (9), and the lower communication port of the solenoid valve (904) is located on the left side of the inner end of the output shaft of the hydraulic push rod (9), and the upper communication port of the solenoid valve (904) is located on the right side of the left end of the push plug rod (903); The middle portion of the support pad (10) is concavely arranged, the rubber lining (905) is located in the concave groove in the middle portion of the support pad (10), and the bottom of the concave groove in the middle portion of the support pad (10) is connected to the interior of the second hydraulic pipe (902); The pressure-applying component (12) and the detection head (13) are respectively arranged on the left and right sides of the middle of the detection platform (1), and the pressure-applying component (12) and the detection head (13) are driven by a hydraulic component.

2. The automatic hardness testing machine for wheel hub after heat treatment according to claim 1, characterized in that: The movable base (7) and the movable support (6) form a relatively rotating structure, and a ball bearing is provided at the rotating connection between the movable base (7) and the movable support (6), and a gear assembly meshing with the motor gear assembly (11) is provided at the edge of the top outer wall of the movable base (7).

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