A spraying device for the surface material of a TC bearing

Abstract

The present invention relates to the technical field of spraying of bearing surface materials, and specifically relates to a spraying device for TC bearing surface materials, which includes a plasma spraying machine body and a spray head installed on the plasma spraying machine body. The spray head sprays WC alloy powder on the surface of the TC bearing. A support platform is arranged outside the plasma spraying machine body, and a bearing moving and positioning mechanism is installed on the support platform; by means of the bearing moving and positioning mechanism arranged on the support platform, the TC bearing can be supported while the plasma spraying machine body sprays WC alloy powder on the surface of the TC bearing. After the spraying and cladding of the TC bearing is completed, the TC bearing after spraying and cladding can be quickly placed into the heat preservation chamber, and slowly cooled inside the heat preservation chamber, so as to effectively relieve the stress concentration problem of the WC alloy powder cladded on the outer side of the TC bearing, and further solve the problem that pores and inclusion of unmelted particles inside the coating become crack sources.

Description

Technical Field

[0001] The present invention relates to the technical field of spraying technology for bearing surface materials, and specifically relates to a spraying device for TC bearing surface materials. Background Technique

[0002] The TC bearing is a cemented carbide radial bearing, which is formed by high-temperature sintering of tungsten carbide powder and cemented carbide. The sintered layer is firmly bonded to the steel matrix, and the hardness can reach 200-300 HB. It is mainly used in extreme working conditions with high loads and strong wear.

[0003] Currently, after the existing TC bearings are processed, in order to improve the wear resistance of the TC bearings, the outer surface of the existing TC bearings is also sprayed with WC alloy powder (i.e., tungsten carbide powder) so that the WC alloy powder is cladded on the outer surface of the TC bearings. However, after the spraying and cladding of the WC alloy powder is completed, due to the large difference in the thermal expansion coefficients between the WC alloy powder and the matrix (such as steel) ( ), residual tensile stress is generated during rapid cooling after cladding, resulting in pores, inclusions or unmelted particles inside the TC bearing coating becoming crack sources. For this reason, we propose a spraying device for TC bearing surface materials. Summary of the Invention

[0004] The purpose of the present invention is to provide a spraying device for TC bearing surface materials to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A spraying device for TC bearing surface materials, including a plasma spraying machine body and a spray head installed on the plasma spraying machine body. The spray head sprays WC alloy powder on the surface of the TC bearing. A support table is provided outside the plasma spraying machine body, and a bearing moving and positioning mechanism is installed on the support table. The bearing moving and positioning mechanism is used to support the TC bearing;

[0006] One end of the support table is provided with a heat preservation chamber. A feed inlet is provided on the side of the heat preservation chamber close to the support table, and a closing mechanism is provided at the feed inlet;

[0007] A bearing supporting mechanism is provided inside the heat preservation chamber. The bearing supporting mechanism cooperates with the bearing moving and positioning mechanism to timely heat-insulate the TC bearing after spraying and cladding.

[0008] Further, the bearing moving and positioning mechanism includes a support plate, a moving block, a spreading and positioning member, a rotating lead screw, a guide rod and a driving member. The support plate is fixedly installed on the support table, and the moving block is slidably connected to the support table. The spreading and positioning member is installed on the moving block;

[0009] One end of the rotating lead screw is rotatably connected to the support plate, and the moving block is threadedly sleeved on the outside of the rotating lead screw. One end of the guide rod is rotatably connected to the support plate. The moving block is provided with a through hole, and a guide sleeve is rotatably connected at the through hole. The guide sleeve is slidably sleeved on the outside of the guide rod. A synchronizing member is provided on the outside of the guide sleeve, and the synchronizing member is connected to the spreading and positioning member;

[0010] There are two driving members, both of the two driving members are installed on the support platform, and the two driving members respectively drive the rotating lead screw and the guide rod;

[0011] The other end of the rotating lead screw passes through the insulation chamber and is connected to the bearing supporting mechanism.

[0012] Further, the spreading and positioning member includes a fixing plate, a rotating sleeve, a rotating shell and a clamping member. The fixing plate is fixedly installed on the moving block, and the rotating sleeve penetrates through the fixing plate. The rotating sleeve is rotatably connected to the fixing plate. The synchronizing member is connected to the rotating sleeve. One end of the rotating sleeve is fixedly connected to the rotating shell. The clamping member is installed between the rotating sleeve and the rotating shell. By providing the spreading and positioning member, the function of spreading and positioning the TC bearing is realized.

[0013] Further, the clamping member includes a rotating plate, a connecting rod, a clamping block, a rotating shaft and a rotating motor. The rotating plate is rotatably connected inside the rotating shell. The rotating plate is provided with a plurality of arc-shaped grooves. There are a plurality of connecting rods, and the plurality of connecting rods respectively slide through the plurality of arc-shaped grooves. The rotating shell is provided with a moving port corresponding to the connecting rod. One end of the connecting rod is fixedly connected to the clamping block, and the clamping block is slidably connected to the outside of the moving port;

[0014] The rotating shaft penetrates through the rotating sleeve, and one end of the rotating shaft is fixedly connected to the rotating plate. The rotating motor is fixedly installed on the rotating sleeve, and the rotating motor is used to drive the rotating shaft. By providing the clamping member, the function of clamping and positioning the TC bearing is realized.

[0015] Further, the closing mechanism includes a closing plate, a connecting seat and a pushing member. One side of the closing plate is located at the entrance, and the closing plate is rotatably connected to the connecting seat through a pin shaft. The connecting seat is fixedly installed on the outside of the insulation chamber. The pushing member is installed on the outside of the insulation chamber, and the pushing member is used to push the closing plate. By providing the closing mechanism, the function of opening and closing the entrance is realized.

[0016] Furthermore, the pusher includes an electric push rod, a pushing support rod, and a pushing block. The electric push rod is fixedly installed outside the heat preservation chamber, and the output end of the electric push rod is rotatably connected to the pushing support rod. The other end of the pushing support rod is rotatably connected to the pushing block through a pin shaft, and the pushing block is fixedly installed on the closing plate. By providing the pusher, the function of pushing the closing plate is realized.

[0017] Furthermore, the bearing support mechanism includes a positioning sleeve, a positioning plate, a rotating member, a support member, and an adjusting member. The positioning sleeve is located inside the heat preservation chamber, and one end of the positioning sleeve is fixedly connected to the positioning plate. The positioning plate is provided with a circular hole corresponding to the position of the positioning sleeve, and the positioning plate is rotatably connected inside the heat preservation chamber;

[0018] The rotating member is installed inside the positioning sleeve, and the rotating member is connected to the rotating screw rod. There are multiple support members, and the multiple support members are arranged around one side of the positioning plate close to the entrance. The adjusting member is installed at the top inside the heat preservation chamber, and the adjusting member is used to adjust the support members. By providing the bearing support mechanism, the function of docking and positioning the bearing is realized.

[0019] Furthermore, the rotating member includes an internal gear ring and a rotating gear. The internal gear ring is fixedly installed inside the positioning sleeve, and the internal gear ring is meshed with the rotating gear. The rotating gear is fixedly sleeved outside the rotating screw rod. By providing the rotating member, the function of driving the positioning sleeve is realized.

[0020] Furthermore, the support member includes a guide rail, a spreading plate, a positioning rod, a positioning spring, a positioning support rod, and a positioning ear. The guide rail is fixedly installed on one side of the positioning plate. There are two spreading plates, and the two spreading plates are respectively slidably sleeved at both ends of the guide rail. The positioning rod slidably penetrates through the two spreading plates. The positioning spring is sleeved outside the positioning rod, and both ends of the positioning spring are fixedly connected to the two spreading plates;

[0021] The positioning support rod is rotatably connected to the guide rail through a pin shaft, and both ends of the positioning support rod are respectively rotatably connected to the two positioning ears. The two positioning ears are respectively fixedly connected to the two spreading plates. A synchronous rod is installed on one spreading plate close to the inner wall of the heat preservation chamber, and a first wedge-shaped block is fixedly installed on the synchronous rod. By providing the support member, the function of supporting and positioning the TC bearing is realized.

[0022] Further, the adjusting member includes a fixed block, a moving rod, a second wedge-shaped block, a connecting spring, and a contact plate. The fixed block is fixedly installed at the top inside the heat preservation chamber, and the moving rod slidably penetrates through the fixed block. One end of the moving rod is fixedly connected to the second wedge-shaped block, and the other end of the moving rod is fixedly connected to the contact plate. The second wedge-shaped block is slidably connected to the adjacent first wedge-shaped block. The connecting spring is sleeved outside the moving rod, and both ends of the connecting spring are fixedly connected to the fixed block and the contact plate respectively. By providing the adjusting member, the function of pushing the adjacent first wedge-shaped block is realized.

[0023] The present invention has at least the following beneficial effects:

[0024] 1. When the present invention is in use, through the bearing moving and positioning mechanism provided on the support platform, while the plasma spraying machine body sprays WC alloy powder on the surface of the TC bearing, the TC bearing can be supported, and the TC bearing can be rotated relative to the nozzle, so that the TC bearing can be sprayed in all directions;

[0025] 2. After the TC bearing is sprayed and clad, through the bearing supporting mechanism provided inside the heat preservation chamber, which cooperates with the bearing moving and positioning mechanism, the sprayed and clad TC bearing can be quickly placed inside the heat preservation chamber and slowly cooled inside the heat preservation chamber, so as to effectively relieve the stress concentration problem of the WC alloy powder clad on the outside of the TC bearing, and further solve the problem that pores and inclusion of unmelted particles inside the coating become crack sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a side view of the overall structure of the present invention;

[0028] Figure 3 is a schematic diagram of the structure of the support platform of the present invention;

[0029] Figure 4 is a schematic diagram of the structure of the driving member of the present invention;

[0030] Figure 5 For the present invention Figure 4 is an enlarged schematic diagram of area A;

[0031] Figure 6 is a schematic diagram of the structure of the synchronizing member of the present invention;

[0032] Figure 7 is a schematic diagram of the structure of the clamping block of the present invention;

[0033] Figure 8 is a top view of the structure of the rotating plate of the present invention;

[0034] Figure 9 Schematic diagram of the arc groove structure of the present invention;

[0035] Figure 10 Schematic diagram of the rotating part structure of the present invention;

[0036] Figure 11 Schematic diagram of the insulation chamber structure of the present invention;

[0037] Figure 12 Schematic diagram of the positioning plate structure of the present invention;

[0038] Figure 13 Schematic diagram of the support part structure of the present invention;

[0039] Figure 14 For the present invention Figure 13 Enlarged structure schematic diagram of area B in;

[0040] Figure 15 Schematic diagram of the positioning support rod structure of the present invention.

[0041] In the figure: 1 - Ion spraying machine body; 2 - Nozzle; 3 - Support table; 4 - Bearing moving and positioning mechanism; 41 - Support plate; 42 - Moving block; 43 - Expanding and positioning part; 431 - Fixed plate; 432 - Rotating sleeve; 433 - Rotating shell; 4331 - Moving port; 434 - Clamping part; 4341 - Rotating plate; 43411 - Arc groove; 4342 - Connecting rod; 4343 - Clamping block; 4344 - Rotating shaft; 4345 - Rotating motor; 44 - Rotating lead screw; 45 - Guide rod; 46 - Driving part; 461 - Protective shell; 462 - Driving motor; 463 - First driving gear; 464 - Gear chain; 465 - Second driving gear; 47 - Guide sleeve; 471 - Raised strip; 48 - Synchronizing part; 481 - First synchronizing gear; 482 - Second synchronizing gear; 483 - Synchronizing chain; 5 - Insulation chamber; 51 - Entrance; 6 - Closing mechanism; 61 - Closing plate; 62 - Connecting seat; 63 - Pushing part; 631 - Electric push rod; 632 - Pushing support rod; 633 - Pushing block; 7 - Bearing supporting mechanism; 71 - Positioning sleeve; 72 - Positioning plate; 73 - Rotating part; 731 - Inner gear ring; 732 - Rotating gear; 74 - Support part; 741 - Guide rail; 742 - Expanding plate; 743 - Positioning rod; 744 - Positioning spring; 745 - Positioning support rod; 746 - Positioning ear; 747 - Synchronizing rod; 748 - First wedge-shaped block; 75 - Adjusting part; 751 - Fixed block; 752 - Moving rod; 753 - Second wedge-shaped block; 754 - Connecting spring; 755 - Contact plate. Detailed implementation manners

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention. Embodiment 1

[0043] Please refer to Figures 1 to 4 , a spraying device for the surface material of a TC bearing, which includes a plasma spraying machine body 1 and a spray head 2 installed on the plasma spraying machine body 1. The spray head 2 sprays WC alloy powder on the surface of the TC bearing. A support platform 3 is provided outside the plasma spraying machine body 1, and a bearing moving and positioning mechanism 4 is installed on the support platform 3. The bearing moving and positioning mechanism 4 is used to support the TC bearing;

[0044] Please refer to Figures 1 to 5 , the bearing moving and positioning mechanism 4 includes a support plate 41, a moving block 42, a spreading and positioning member 43, a rotating lead screw 44, a guide rod 45 and a driving member 46. The support plate 41 is fixedly installed on the support platform 3, and the moving block 42 is slidably connected to the support platform 3. The spreading and positioning member 43 is installed on the moving block 42;

[0045] One end of the rotating lead screw 44 is rotatably connected to the support plate 41, and the moving block 42 is threadedly sleeved outside the rotating lead screw 44. One end of the guide rod 45 is rotatably connected to the support plate 41. The moving block 42 is provided with a through hole, and a guide sleeve 47 is rotatably connected at the through hole. The guide sleeve 47 is slidably sleeved outside the guide rod 45. A synchronizing member 48 is provided outside the guide sleeve 47, and the synchronizing member 48 is connected to the spreading and positioning member 43;

[0046] There are two driving members 46, and both driving members 46 are installed on the support platform 3, and the two driving members 46 respectively drive the rotating lead screw 44 and the guide rod 45;

[0047] The other end of the rotating lead screw 44 passes through the insulation chamber 5 and is connected to the bearing supporting mechanism 7.

[0048] Please refer to Figures 6 to 9 , the spreading and positioning member 43 includes a fixing plate 431, a rotating sleeve 432, a rotating shell 433 and a clamping member 434. The fixing plate 431 is fixedly installed on the moving block 42, and the rotating sleeve 432 passes through the fixing plate 431. The rotating sleeve 432 is rotatably connected to the fixing plate 431. The synchronizing member 48 is connected to the rotating sleeve 432. One end of the rotating sleeve 432 is fixedly connected to the rotating shell 433, and the clamping member 434 is installed between the rotating sleeve 432 and the rotating shell 433.

[0049] The clamping member 434 includes a rotating plate 4341, a connecting rod 4342, a clamping block 4343, a rotating shaft 4344 and a rotating motor 4345. The rotating plate 4341 is rotatably connected to the inside of the rotating shell 433. The rotating plate 4341 is provided with a plurality of arc grooves 43411, and the plurality of arc grooves 43411 in this embodiment are staggered with each other. The connecting rod 4342 is provided with a plurality of connecting rods 4342, and the plurality of connecting rods 4342 respectively slide through the plurality of arc grooves 43411, that is, each arc groove 43411 is respectively connected with a connecting rod 4342, and the connecting rod 4342 is adjusted by rotating the arc groove 43411. The rotating shell 433 is provided with a moving opening 4331 at a position corresponding to the connecting rod 4342, one end of the connecting rod 4342 is fixedly connected to the clamping block 4343, and the clamping block 4343 is slidably connected to the outside of the moving opening 4331.

[0050] The rotating shaft 4344 passes through the rotating sleeve 432, and one end of the rotating shaft 4344 is fixedly connected to the rotating plate 4341. The rotating motor 4345 is fixedly installed on the rotating sleeve 432, and the rotating motor 4345 is used to drive the rotating shaft 4344;

[0051] See also Figure 6 The synchronous member 48 includes a first synchronous gear 481, a second synchronous gear 482 and a synchronous chain 483. The first synchronous gear 481 is fixedly sleeved on the outside of the guide sleeve 47, and the second synchronous gear 482 is fixedly sleeved on the outside of the rotating sleeve 432. The synchronous chain 483 is transmission-connected between the first synchronous gear 481 and the second synchronous gear 482. As a further explanation, in the present invention, two protruding strips 471 are provided on the outside of the guide rod 45, and the guide sleeve 47 is provided with a slide groove at the position corresponding to the two protruding strips 471.

[0052] That is, when the guide rod 45 rotates, the two raised strips 471 synchronously drive the guide sleeve 47 to rotate relative to the moving block 42. When the guide sleeve 47 rotates, under the connection of the first synchronous gear 481, the synchronous chain 483 and the second synchronous gear 482, the rotating sleeve 432 is driven to rotate relative to the fixed plate 431. When the rotating sleeve 432 rotates, the rotating shell 433 drives the TC bearing thereon to rotate, so that the TC bearing cooperates with the nozzle 2 of the plasma spraying machine body 1, so as to achieve the effect of fully spraying and cladding the WC alloy powder on the surface of the TC bearing.

[0053] Specific implementation process: When spraying and cladding WC alloy powder on the outer side of the TC bearing, one end of the TC bearing is in contact with the rotating shell 433. At the same time, the inner ring of the TC bearing is located outside multiple clamping blocks 4343. Subsequently, the rotating motor 4345 operates, causing the rotating shaft 4344 to rotate. When the rotating shaft 4344 rotates, it drives the rotating plate 4341 to rotate relative to the rotating shell 433. At this time, under the limiting action of multiple connecting rods 4342 in multiple arc-shaped grooves 43411 and the moving port 4331, the connecting rod 4342 further drives the clamping plate to move along the inner ring of the TC bearing until multiple clamping plates expand and position the TC bearing through the inner ring of the TC bearing;

[0054] Subsequently, through the operation of the driving member 46 at the synchronous rod 747, the guide rod 45 drives the rotating sleeve 432 to rotate through the synchronous member 48, so that the TC bearing at the rotating shell 433 cooperates with the spray head 2 to realize the function of fully spraying and cladding WC alloy powder on the outer surface of the TC bearing.

[0055] Please refer to Figures 1 to 4 and Figures 10 to 15 As shown in the figure, one end of the support table 3 is provided with a heat preservation chamber 5. The heat preservation chamber 5 contains heat preservation materials inside, which plays a role in heat preservation for the TC bearing. One side of the heat preservation chamber 5 close to the support table 3 is provided with an access port 51, and a closing mechanism 6 is provided at the access port 51. In this embodiment, the access port 51 is circularly arranged, and at the same time, the diameter of the access port 51 is larger than the diameter of the circular rotating shell 433, so that the rotating shell 433 can extend into the interior of the access port 51;

[0056] Please refer to Figure 4 As shown in the figure, the closing mechanism 6 includes a closing plate 61, a connecting seat 62 and a pushing member 63. One side of the closing plate 61 is located at the access port 51, and the closing plate 61 is rotatably connected to the connecting seat 62 through a pin shaft. The setting of the closing plate 61 can close the access port 51, ensure the heat preservation effect inside the heat preservation chamber 5, and at the same time facilitate the taking and placing of the TC bearing;

[0057] The connecting seat 62 is fixedly installed on the outside of the heat preservation chamber 5, and the pushing member 63 is installed on the outside of the heat preservation chamber 5, and the pushing member 63 is used to push the closing plate 61;

[0058] The driving member 63 includes an electric push rod 631, a driving support rod 632, and a driving block 633. The electric push rod 631 is fixedly installed outside the heat preservation chamber 5, and the output end of the electric push rod 631 is rotatably connected to the driving support rod 632. The other end of the driving support rod 632 is rotatably connected to the driving block 633 through a pin shaft, and the driving block 633 is fixedly installed on the closing plate 61. At the same time, in this embodiment, a heat insulation block is provided outside the heat preservation chamber 5, which can play a role in heat insulation and support the electric push rod 631, so as to ensure the stable operation of the electric push rod 631.

[0059] Specific implementation process: When the TC bearing completes the spraying and cladding of WC alloy powder, the moving block 42 drives the TC bearing thereon to move along the direction of the heat preservation chamber 5. At the same time of moving, the electric push rod 631 operates, that is, the output end of the electric push rod 631 retracts. Then, the closing plate 61 is driven to rotate through the driving support rod 632 and the driving block 633. Due to the limiting effect of the connecting seat 62 on the closing plate 61, the closing plate 61 rotates around the connection point with the connecting seat 62 until the closing plate 61 is opened and is in a parallel state with the support table 3.

[0060] Please refer to Figures 10 to 15 , a bearing supporting mechanism 7 is provided inside the heat preservation chamber 5. The bearing supporting mechanism 7 cooperates with the bearing moving and positioning mechanism 4 to timely insulate the TC bearing after spraying and cladding;

[0061] The bearing supporting mechanism 7 includes a positioning sleeve 71, a positioning plate 72, a rotating member 73, a supporting member 74, and an adjusting member 75. The positioning sleeve 71 is located inside the heat preservation chamber 5, and one end of the positioning sleeve 71 is fixedly connected to the positioning plate 72. The positioning plate 72 is provided with a circular hole corresponding to the position of the positioning sleeve 71, and the positioning plate 72 is rotatably connected inside the heat preservation chamber 5;

[0062] The rotating member 73 is installed inside the positioning sleeve 71, and the rotating member 73 is connected to the rotating lead screw 44. There are multiple supporting members 74. In this embodiment, preferably six supporting members 74 are provided. The multiple supporting members 74 are arranged around the side of the positioning plate 72 close to the inlet 51. The adjusting member 75 is installed at the top inside the heat preservation chamber 5, and the adjusting member 75 is used to adjust the supporting members 74;

[0063] The rotating member 73 includes an internal gear ring 731 and a rotating gear 732. The internal gear ring 731 is fixedly installed inside the positioning sleeve 71, and the internal gear ring 731 is meshed and connected with the rotating gear 732. The rotating gear 732 is fixedly sleeved outside the rotating lead screw 44. In this embodiment, the rotating lead screw 44 and the guide rod 45 respectively penetrate through the positioning sleeve 71, and one ends of the rotating lead screw 44 and the guide rod 45 are respectively rotatably connected to the inner wall of the heat preservation chamber 5. This setting can ensure the stable support of the rotating lead screw 44 and the guide rod 45.

[0064] Meanwhile, in this embodiment, since six support members 74 are preferably provided, when the rotating lead screw 44 rotates, although the internal gear ring 731 and the positioning sleeve 71 can be driven to rotate relative to the heat preservation chamber 5 through the rotating gear 732, when the positioning sleeve 71 rotates, the TC bearing on the positioning plate 72 rotates relative to the inside of the heat preservation chamber 5, thereby further realizing the function of uniformly cooling the TC bearing. In this embodiment, when the rotating lead screw 44 rotates, during the process that the moving block 42 drives the TC bearing thereon to move along the heat preservation chamber 5, the positioning sleeve 71 drives the positioning plate 72 to rotate by N + 30°. And when the moving block 42 returns to its original position, the positioning sleeve 71 drives the positioning plate 72 to rotate by N + 30°. That is, in the present invention, before the moving block 42 moves along the direction of the inlet 51, the positioning plate 72 starts to rotate from N + 30°, until the TC bearing is placed into the inlet 51, the positioning plate 72 rotates by 2N + 60°, so that there is no TC bearing on the support member 74 at the position of the inlet 51, thereby realizing the support of the newly entered TC bearing.

[0065] Please refer to Figure 15 , the support member 74 includes a guide rail 741, a spreading plate 742, a positioning rod 743, a positioning spring 744, a positioning support rod 745 and a positioning ear 746. The guide rail 741 is fixedly installed on one side of the positioning plate 72. There are two spreading plates 742, and the two spreading plates 742 are respectively slidably sleeved at both ends of the guide rail 741. The positioning rod 743 slidably penetrates through the two spreading plates 742. The positioning spring 744 is sleeved outside the positioning rod 743, and both ends of the positioning spring 744 are fixedly connected to the two spreading plates 742.

[0066] The positioning support rod 745 is rotatably connected to the guide rail 741 through a pin shaft, and both ends of the positioning support rod 745 are respectively rotatably connected to the two positioning ears 746. The two positioning ears 746 are respectively fixedly connected to the two spreading plates 742. A synchronous rod 747 is installed on one spreading plate 742 close to the inner wall of the heat preservation chamber 5, and a first wedge-shaped block 748 is fixedly installed on the synchronous rod 747.

[0067] The adjusting member 75 includes a fixing block 751, a moving rod 752, a second wedge-shaped block 753, a connecting spring 754 and a contact plate 755. The fixing block 751 is fixedly installed at the top inside the heat preservation chamber 5, and the moving rod 752 slidably penetrates through the fixing block 751. One end of the moving rod 752 is fixedly connected to the second wedge-shaped block 753, and the other end of the moving rod 752 is fixedly connected to the contact plate 755. The second wedge-shaped block 753 is slidably connected to the adjacent first wedge-shaped block 748. The connecting spring 754 is sleeved outside the moving rod 752, and both ends of the connecting spring 754 are fixedly connected to the fixing block 751 and the contact plate 755 respectively;

[0068] Specific implementation process: When the TC bearing finishes spraying and cladding WC alloy powder, at this time, the driving member 46 at the screw rod 44 runs, so that the screw rod 44 rotates relative to the moving block 42. When the screw rod 44 rotates, it provides driving force for the moving block 42. Under the limiting action of the support table 3 and the guide rod 45, the moving block 42 drives the TC bearing to move along the inlet 51. At this time, the inlet 51 is in an open state, and the TC bearing enters through the inlet 51. When the TC bearing is about to approach the position of the two spreading plates 742, the edge of the rotating shell 433 contacts the contact plate 755 and pushes the contact plate 755. At this time, the contact plate 755 drives the second wedge-shaped block 753 to move along the direction of the first wedge-shaped block 748 through the connection of the moving rod 752 and the connecting spring 754. Thus, the second wedge-shaped block 753 pushes the first wedge-shaped block 748, and the first wedge-shaped block 748 drives the spreading plate 742 to move along the guide rail 741 through the spreading plate 742 on it. At the same time, the two spreading plates 742 move towards each other further under the connection of the positioning support rod 745, the positioning rod 743 and the positioning spring 744. Subsequently, one end of the TC bearing is sleeved outside the two spreading plates 742. At the same time, by running the rotating motor 4345, the multiple clamping blocks 4343 on the TC bearing are separated from the inner ring of the TC bearing respectively. Then the two spreading plates 742 support the TC bearing relatively. Subsequently, the moving block 42 drives the rotating plate to leave the inlet 51. Then the two spreading plates 742 move along the inner ring of the TC bearing again under the connection of the positioning spring 744 until the two spreading plates 742 expand and fix the TC bearing. Subsequently, the inlet 51 closes, and the positioning plate 72 moves along the inside of the heat preservation chamber 5 to realize slow cooling of the TC bearing, thereby effectively alleviating the problem of stress concentration of the WC alloy powder cladded on the outside of the TC bearing, and further solving the problem that pores and inclusion of unmelted particles inside the coating become crack sources. Embodiment Two

[0069] Please refer to Figure 4, Embodiment 2 is a further supplementary description of Embodiment 1, specifically: the driving member 46 includes a protective shell 461, a driving motor 462, a first driving gear 463, a gear chain 464 and a second driving gear 465, the protective shell 461 is installed on the support platform 3, and the driving motor 462 is fixedly installed inside the protective shell 461, the output end of the driving motor 462 is fixedly connected to the first driving gear 463, the second driving gear 465 is fixedly connected to one end of the rotating screw rod 44 or the guide rod 45, and the gear chain 464 is transmission-connected between the first driving gear 463 and the second driving gear 465;

[0070] Furthermore, when the rotating screw 44 or the guide rod 45 is driven, the driving motor 462 runs, so that the first driving gear 463 drives the second driving gear 465 to rotate through the gear chain 464, thereby causing the rotating screw 44 or the guide rod 45 to rotate relative to the support plate 41.

[0071] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spraying device for the surface material of a TC bearing, comprising a plasma spraying machine body (1) and a spray head (2) installed on the plasma spraying machine body (1), wherein the spray head (2) sprays WC alloy powder on the surface of the TC bearing, and is characterized in that: A support platform (3) is provided outside the plasma spraying machine body (1), and a bearing moving and positioning mechanism (4) is installed on the support platform (3), and the bearing moving and positioning mechanism (4) is used to support the TC bearing; One end of the support platform (3) is provided with a heat preservation chamber (5), an inlet (51) is provided on the side of the heat preservation chamber (5) close to the support platform (3), and a closing mechanism (6) is provided at the inlet (51); A bearing supporting mechanism (7) is arranged inside the heat preservation chamber (5), and the bearing supporting mechanism (7) cooperates with the bearing moving and positioning mechanism (4) to timely heat-insulate the TC bearing after spraying and cladding; The bearing moving and positioning mechanism (4) includes a support plate (41), a moving block (42), a spreading and positioning member (43), a rotating lead screw (44), a guide rod (45) and a driving member (46); The bearing supporting mechanism (7) includes a positioning sleeve (71), a positioning plate (72), a rotating member (73), a supporting member (74) and an adjusting member (75). The positioning sleeve (71) is located inside the heat preservation chamber (5), and one end of the positioning sleeve (71) is fixedly connected to the positioning plate (72). The positioning plate (72) is provided with a round hole corresponding to the position of the positioning sleeve (71), and the positioning plate (72) is rotatably connected inside the heat preservation chamber (5); The rotating member (73) is installed inside the positioning sleeve (71), and the rotating member (73) is connected to the rotating lead screw (44). A plurality of the supporting members (74) are provided, and the plurality of supporting members (74) are arranged around the side of the positioning plate (72) close to the inlet (51). The adjusting member (75) is installed at the top end inside the heat preservation chamber (5), and the adjusting member (75) is used to adjust the supporting members (74).

2. The spraying device for the surface material of a TC bearing according to claim 1, characterized in that: The support plate (41) is fixedly installed on the support platform (3), and the moving block (42) is slidably connected to the support platform (3), and the spreading and positioning member (43) is installed on the moving block (42); One end of the rotating lead screw (44) is rotatably connected to the support plate (41), and the moving block (42) is threadedly sleeved outside the rotating lead screw (44). One end of the guide rod (45) is rotatably connected to the support plate (41). The moving block (42) is provided with a through hole, and a guide sleeve (47) is rotatably connected at the through hole. The guide sleeve (47) is slidably sleeved outside the guide rod (45). A synchronizing member (48) is provided on the outside of the guide sleeve (47), and the synchronizing member (48) is connected to the spreading and positioning member (43); Two driving members (46) are provided, and both of the two driving members (46) are installed on the support platform (3), and the two driving members (46) respectively drive the rotating lead screw (44) and the guide rod (45); The other end of the rotating lead screw (44) passes through the heat preservation chamber (5) and is connected to the bearing supporting mechanism (7).

3. The spraying device for the surface material of a TC bearing according to claim 2, characterized in that: The spreading and positioning member (43) includes a fixing plate (431), a rotating sleeve (432), a rotating shell (433) and a clamping member (434). The fixing plate (431) is fixedly installed on the moving block (42). Where the rotating sleeve (432) passes through the fixing plate (431), the rotating sleeve (432) is rotatably connected to the fixing plate (431). The synchronizing member (48) is connected to the rotating sleeve (432). One end of the rotating sleeve (432) is fixedly connected to the rotating shell (433). The clamping member (434) is installed between the rotating sleeve (432) and the rotating shell (433).

4. The spraying device for the surface material of a TC bearing according to claim 3, characterized in that: The clamping member (434) includes a rotating plate (4341), a connecting rod (4342), a clamping block (4343), a rotating shaft (4344) and a rotating motor (4345). The rotating plate (4341) is rotatably connected inside the rotating shell (433). A plurality of arc-shaped grooves (43411) are provided on the rotating plate (4341). A plurality of the connecting rods (4342) are provided. The plurality of connecting rods (4342) respectively slide through the plurality of arc-shaped grooves (43411). The rotating shell (433) is provided with a moving port (4331) corresponding to the position of the connecting rod (4342). One end of the connecting rod (4342) is fixedly connected to the clamping block (4343), and the clamping block (4343) is slidably connected to the outside of the moving port (4331). The rotating shaft (4344) passes through the rotating sleeve (432), and one end of the rotating shaft (4344) is fixedly connected to the rotating plate (4341). The rotating motor (4345) is fixedly installed on the rotating sleeve (432), and the rotating motor (4345) is used to drive the rotating shaft (4344).

5. The spraying device for the surface material of a TC bearing according to claim 1, characterized in that: The closing mechanism (6) includes a closing plate (61), a connecting seat (62) and a pushing member (63). One side of the closing plate (61) is located at the entrance (51), and the closing plate (61) is rotatably connected to the connecting seat (62) through a pin shaft. The connecting seat (62) is fixedly installed outside the heat preservation chamber (5). The pushing member (63) is installed outside the heat preservation chamber (5), and the pushing member (63) is used to push the closing plate (61).

6. The spraying device for the surface material of a TC bearing according to claim 5, characterized in that: The pushing member (63) includes an electric push rod (631), a pushing support rod (632) and a pushing block (633). The electric push rod (631) is fixedly installed outside the heat preservation chamber (5), and the output end of the electric push rod (631) is rotatably connected to the pushing support rod (632). The other end of the pushing support rod (632) is rotatably connected to the pushing block (633) through a pin shaft, and the pushing block (633) is fixedly installed on the closing plate (61).

7. The spraying device for the surface material of a TC bearing according to claim 1, characterized in that: The rotating member (73) includes an internal gear ring (731) and a rotating gear (732). The internal gear ring (731) is fixedly installed inside the positioning sleeve (71), and the internal gear ring (731) is meshed with the rotating gear (732). The rotating gear (732) is fixedly sleeved outside the rotating lead screw (44).

8. A spraying device for the surface material of a TC bearing according to claim 1, characterized in that: The support member (74) includes a guide rail (741), a spreading plate (742), a positioning rod (743), a positioning spring (744), a positioning support rod (745) and a positioning ear (746). The guide rail (741) is fixedly installed on one side of the positioning plate (72). There are two spreading plates (742), and the two spreading plates (742) are respectively slidably sleeved at both ends of the guide rail (741). The positioning rod (743) slidably penetrates through the two spreading plates (742). The positioning spring (744) is sleeved outside the positioning rod (743), and both ends of the positioning spring (744) are fixedly connected to the two spreading plates (742). The positioning support rod (745) is rotatably connected to the guide rail (741) through a pin shaft, and both ends of the positioning support rod (745) are respectively rotatably connected to the two positioning ears (746). The two positioning ears (746) are respectively fixedly connected to the two spreading plates (742). A synchronizing rod (747) is installed on one spreading plate (742) close to the inner wall of the heat preservation chamber (5), and a first wedge-shaped block (748) is fixedly installed on the synchronizing rod (747).

9. The spraying device for the surface material of a TC bearing according to claim 1, characterized in that: The adjusting member (75) includes a fixed block (751), a moving rod (752), a second wedge-shaped block (753), a connecting spring (754) and a contact plate (755). The fixed block (751) is fixedly installed at the top inside the heat preservation chamber (5), and the moving rod (752) slidably penetrates through the fixed block (751). One end of the moving rod (752) is fixedly connected to the second wedge-shaped block (753), and the other end of the moving rod (752) is fixedly connected to the contact plate (755). The second wedge-shaped block (753) is slidably connected to the adjacent first wedge-shaped block (748). The connecting spring (754) is sleeved outside the moving rod (752), and both ends of the connecting spring (754) are respectively fixedly connected to the fixed block (751) and the contact plate (755).

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