Check ring and supersonic flame spraying device and method

Abstract

The invention discloses a check ring and a high velocity oxy-fuel spraying device and method.The spraying device comprises a supporting cylinder inserted into an inner cavity of an outer circle surface part, the other end of the supporting cylinder is fixed in a chuck, the outer circle surface part comprises a tail end part, the tail end part comprises a lug, the periphery of the outer circle surface part is sleeved with a check block, and the lug is connected with the check block. The check block is arranged on the outer side of the lug piece in a check mode, and the check ring is arranged on the periphery of the outer circle surface part in a sleeving mode and covers the outer side of the groove of the outer circle surface part. According to the method, the original mode that auxiliary materials are manually used for protecting the non-spraying area and the spraying transition area is changed, the work efficiency of protection of the non-spraying area of the part before spraying of the part is effectively improved, control over the transition area of a flame spraying layer is further guaranteed, and the product machining quality is improved. The method can be applied to protection of non-flame spraying surfaces and control of flame spraying surface transition areas in the high velocity oxy-fuel spraying process of the outer circle faces of regular parts, and the completeness and regularity of the flame spraying transition areas are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of spraying, in particular to a retaining ring, a supersonic flame spraying device and a method. Background Art

[0002] For parts with high wear resistance requirements on the outer surface of regular parts, supersonic flame spraying is required, and the protection requirements for the transition zone after spraying, the quality of the flame sprayed layer and the non-flame sprayed surface are high. In the past, the protection of the non-flame sprayed area and the control of the transition zone of such parts were manually carried out using auxiliary materials (heat-resistant tape, copper sheet, iron wire, etc.), which was labor-intensive and inefficient. The transition zone of the flame sprayed surface was often incomplete and irregular due to improper manual protection, and there was a phenomenon that the protective tooling was blown off due to excessive spraying pressure, resulting in residual flame sprayed layer in the non-flame sprayed area of ​​the part. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a retaining ring, a supersonic flame spraying device and a method in view of the shortcomings of the existing technology, so that the non-flame spraying area of ​​the regular parts during the supersonic flame process is fully protected, the transition zone of the flame spraying layer is complete and regular, and the protection efficiency before flame spraying is high.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A supersonic flame spraying retaining ring comprises a retaining ring body, wherein one side of the inner surface of the retaining ring body is provided with a circular groove, the width of the circular groove is 1-4 mm; preferably, a mounting hole is provided through the retaining ring body in its radial direction.

[0006] The present invention designs a groove with a width of 1 to 4 mm near the flame spraying end and a diameter greater than the inner diameter of the part and the tooling by 1 to 4 mm, so that the molten tungsten carbide powder of the part can penetrate into the groove during the flame spraying process, ensuring a smooth transition in the spraying transition zone without causing a step-like transition and affecting the product processing quality. Further preferably, the width of the circular groove is 2 to 3 mm.

[0007] The present invention also discloses a supersonic flame spraying device, comprising a support tube inserted into the inner cavity of an outer cylindrical surface part, the other end of the support tube is fixed in a chuck, the outer cylindrical surface part comprises a tail end part, the tail end part comprises an ear piece, a stopper is sleeved on the outer periphery of the outer cylindrical surface part, the stopper blocks the outside of the ear piece, the stopper ring is sleeved on the outer periphery of the outer cylindrical surface part and covers the outside of the groove of the outer cylindrical surface part, and also comprises a top cap inserted into the other end of the inner cavity of the outer cylindrical surface part, the outer end of the top cap abuts against the top seat, preferably, the width of the stopper ring body is greater than the groove width of the outer cylindrical surface part by 1 to 4 mm, and the circular groove is installed close to the spraying side.

[0008] The present invention is mainly combined with the part structure. This device mainly consists of a support cylinder, a retaining ring, a retaining block and a top cap. The support cylinder is used to connect the chuck end of the turntable to the rear end of the part, and the top cap is used to connect the tip end of the turntable to the rod end of the part. The retaining block and the retaining ring are respectively used to control the non-spraying areas and the transition areas at both ends of the spraying surface. Finally, the retaining block and the retaining ring are fixed on the part by bolts. This device adopts a method that combines the protection of the non-flame spraying area and the control of the transition area, which not only protects the non-flame spraying area of the part, but also effectively controls the transition area. The transition area of the flame spraying layer is regular and flat, there is no residue of the flame spraying layer in the non-spraying area, the qualified rate of part processing is 100%, and the processing efficiency of the part is significantly improved.

[0009] Through innovative process processing methods, the present invention designs a device for protecting the non-flame spraying area and controlling the transition area, so as to improve the processing efficiency and processing quality of products. It has many advantages such as strong versatility, stable and reliable quality control, and simple and convenient operation.

[0010] In a preferred embodiment of the present invention, a chamfer of 30° - 60° is provided at the end of the circular groove.

[0011] In a preferred embodiment of the present invention, the support cylinder includes a support cylinder body. One end of the outer side of the support cylinder body is provided with a groove, and the other end includes a plug-in portion. A chamfer portion is provided inside the plug-in portion; preferably, the angle α between the chamfer portion and the horizontal plane is 20° - 40°, the length of the plug-in portion is 30 - 50 mm, and the length of the groove is 80 - 120 mm.

[0012] In a preferred embodiment of the present invention, the retaining block includes a circular tube portion and a shielding cover fixedly connected to the top of the circular tube portion. A chamfer is provided on one side of the inner surface of the circular tube portion, and the angle of the chamfer is 30° - 60°, and the chamfer is installed adjacent to the spraying side.

[0013] That is, the angle between the chamfer and the spraying side is 30° - 60°.

[0014] The transition area of spraying is ensured by fitting the hollow part of the retaining block with the lug part of the part, and the lug part can be effectively protected from having a spraying layer during the spraying process. In addition, a chamfer is designed at the spraying end of the retaining block to ensure a smooth transition of the spraying layer, and no stepped transition will occur, which affects the processing quality of the product. That is, as long as the retaining block is fitted with the lug of the part, the spraying transition area of the part can be determined according to the tooling size, so as to achieve the purpose of protecting the lug and the spraying transition area.

[0015] In a preferred embodiment of the present invention, the shielding cover covers the outside of the lug.

[0016] In a preferred embodiment of the present invention, chamfers of 30° to 60° are provided on the outer sides of the shielding covers.

[0017] In a preferred embodiment of the present invention, the top cap includes a frustum portion and a cylindrical portion, and the included angle between the heights of the frustum portion and the cylindrical portion is 20° to 40°.

[0018] In a preferred embodiment of the present invention, the height of the cylindrical portion is 3 to 8 mm.

[0019] In a preferred embodiment of the present invention, a frustum hole is provided on one side of the cylindrical portion, and the frustum hole abuts against the top seat.

[0020] The present invention also discloses a supersonic flame spraying method for the supersonic flame spraying device as described above, which is characterized by including the following steps:

[0021] S1. Install the block at the root of the flame spraying surface of the part, fit it with the lug part and fix it.

[0022] S2. Install the retaining ring at the head of the flame spraying surface and fix it.

[0023] S3. Fix the groove of the support cylinder in the chuck and tighten it.

[0024] S4. Lift the part with the outer circular surface where the block and the retaining ring are installed to the middle position between the support cylinder and the center point of the top seat.

[0025] S5. Insert the frustum portion of the top cap into the inner hole at the rod end of the part with the outer circular surface, rotate the center point of the top seat to align with the frustum hole of the top cap, and fix the tooling and the part.

[0026] S6. Start the flame spraying process of the part, and the spraying trajectory shall not exceed the block and the retaining ring.

[0027] S7. After the flame spraying process of the part with the outer circular surface is completed, loosen the center point of the turntable, remove the top cap, lift the part with the outer circular surface after flame spraying to the transfer platform, remove the block, the retaining ring and the support sleeve, and reserve them for the next use.

[0028] In a preferred embodiment of the present invention, the part with the block and the retaining ring installed in S4 needs to be protected with kraft paper or protective tooling to avoid contamination of the flame spraying surface.

[0029] In S5, it is necessary to ensure that the frustum portion of the top block fits and aligns with the inner hole chamfer.

[0030] In S5, ensure that the tooling and the part are installed tightly without looseness.

[0031] The spraying trajectory in S6 is located between the block and the retaining ring.

[0032] The working principle of the present invention:

[0033] Connect the chuck end of the turntable to the inner hole of the lug end of the part with a support cylinder, and connect the tip end of the turntable to the inner hole of the rod end of the part with a top cap for supporting, fixing the part and subsequent rotation of the part; Install the stop block at the root of the flame sprayed surface of the part and fix it with bolts; Install the retaining ring at the head of the sprayed surface, and fix it with bolts after adjusting to the appropriate distance (transition zone) (the stop block and the retaining ring tooling drill threaded holes with the same specifications for easy selection and management of bolts), and ensure that all components are clamped and fastened during the installation process.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] By changing the original manual protection method for non-sprayed surfaces and transition zones, the present invention designs a special protection device, and the achieved effects are as follows:

[0036] 1. There is no residue of the flame spray coating in the non-sprayed area, and the qualified rate of the spraying transition zone can reach 100%;

[0037] 2. It has strong practicability. It can not only control the flame spraying transition zone to achieve a smooth transition in the flame spray coating transition zone, but also well protect the non-flame spraying area of the part.

[0038] 3. This method is easy to learn and understand, and is convenient for installation and disassembly, and can be extended to the flame spraying processing of other similar products.

[0039] The present invention has been applied to the flame spraying processing of the outer circle surface of regular parts, which has a positive promoting effect on improving the processing efficiency and quality of parts. Brief Description of the Drawings

[0040] Figure 1 It is a structural schematic diagram of the supersonic flame spraying device in an embodiment of the present invention (the chuck and the top seat are not drawn).

[0041] Figure 2 It is a structural schematic diagram of the supersonic flame spraying device in an embodiment of the present invention.

[0042] Figure 3 It is an installation schematic diagram of the top cap and the top seat in an embodiment of the present invention.

[0043] Figure 4 It is a structural schematic diagram of the part on the outer circle surface in an embodiment of the present invention.

[0044] Figure 5 It is a structural schematic diagram of the support cylinder in an embodiment of the present invention.

[0045] Figure 6 It is a structural schematic diagram of the retaining ring in an embodiment of the present invention.

[0046] Figure 7 Structural schematic diagram of a stop block in an embodiment of the present invention.

[0047] Figure 8 Structural schematic diagram of a top cap in an embodiment of the present invention.

[0048] Wherein, chuck 1, support cylinder 2, tail-end part 3, stop block 4, retaining ring 5, bolt 6, top cap 7, top seat 8, outer cylindrical surface part 9; retaining ring body 51, circular groove 52, mounting hole 53; support cylinder body 21, groove 22, insertion part 23, chamfered part 24; circular tube part 41, shielding cover 42, chamfer 43; frustum part 71, cylindrical part 72, frustum hole 73. Detailed implementation manners

[0049] As Figure 6 shown, a supersonic flame spraying retaining ring includes a retaining ring body 51. On one side of the inner surface of the retaining ring body 51, a circular groove 52 is opened, and the width of the circular groove 52 is 2 mm; a mounting hole 53 is radially opened through the retaining ring body 51.

[0050] As Figures 1-4 shown, a supersonic flame spraying device includes a support cylinder 2 inserted into the inner cavity of an outer cylindrical surface part. The other end of the support cylinder 2 is fixed in a chuck 1. The outer cylindrical surface part includes a tail-end part, and the tail-end part includes lugs. A stop block 4 is sleeved on the outer periphery of the outer cylindrical surface part, and the stop block 4 abuts against the outside of the lugs. The retaining ring 5 described in claim 1 is sleeved on the outer periphery of the outer cylindrical surface part and covers the outside of the groove of the outer cylindrical surface part. The device further includes a top cap 7 inserted into the other end of the inner cavity of the outer cylindrical surface part. The outer end of the top cap 7 abuts against a top seat 8. The width of the retaining ring body 51 is 2 mm wider than the width of the groove of the outer cylindrical surface part, and the circular groove 52 is installed near the spraying side.

[0051] As Figure 5 shown, the support cylinder 2 includes a support cylinder body 21. On one end of the outside of the support cylinder body 21, a groove 22 is opened, and the other end includes an insertion part 23. A chamfered part 24 is arranged inside the insertion part 23; the included angle α between the chamfered part 24 and the horizontal plane is 30°, the length of the insertion part 23 is 40 mm, and the width of the groove 22 is 100 mm.

[0052] As Figure 7 shown, the stop block 4 includes a circular tube part 41 and a shielding cover 42 fixedly connected to the top of the circular tube part 41. On one side of the inner surface of the circular tube part 41, a chamfer 43 is opened in a circle, the angle of the chamfer 43 is 45°, and the chamfer 43 is installed near the spraying side. The shielding cover 42 covers the outside of the lugs. 45° chamfers are arranged on the outside of the shielding cover 42.

[0053] AsFigure 8 As shown, the top cap 7 includes a frustum part 71 and a cylindrical part 72, and the included angle between the height of the frustum part 71 and the cylindrical part 72 is 30°. The height of the cylindrical part 72 is 5 mm. A frustum hole 73 is formed on one side of the cylindrical part 72, and the frustum hole 73 abuts against the top seat 8.

[0054] A supersonic flame spraying method for the supersonic flame spraying device described above includes the following steps:

[0055] 1. Install the stop block at the root of the flame spraying surface of the part, fit it with the lug part or adjust it to a proper distance (for the transition area of the plain rod part), and then fix it with bolts.

[0056] 2. Install the retaining ring at the head of the flame spraying surface, adjust it to a proper distance (transition area), and then fix it with bolts.

[0057] 3. Install the non-tapered end of the support cylinder into the turntable jaw and tighten it.

[0058] 4. Protect the flame spraying surface of the part with the stop block and the retaining ring installed by kraft paper or protective tooling (to avoid contamination of the flame spraying surface), and then use a platform crane to lift the part to the middle position between the turntable support sleeve and the center point.

[0059] 5. Install the tapered end of the top cap into the inner hole of the part rod end. After ensuring that the tapered surface of the top block fits and aligns with the inner hole chamfer, rotate the turntable center point to align with the tapered hole of the top cap, and fix the tooling and the part to ensure that the tooling and the part are firmly installed without looseness.

[0060] 6. Start the flame spraying process of the part. The movement trajectory of the manipulator set in the spraying program shall not exceed the two end stop blocks and the retaining ring.

[0061] 7. After the flame spraying process of the part is completed, loosen the turntable center point, remove the top cap, use a crane to lift the part to the tooling table or turnover cart, and remove the stop block, the retaining ring and the support sleeve on the turntable. Place them in the tooling storage area for future use.

Claims

1. A supersonic flame spraying retaining ring, characterized in that, It includes a retaining ring body (51). On one side of the inner surface of the retaining ring body (51), a circular groove (52) is provided, and the width of the circular groove (52) is 1 - 4 mm; preferably, an installation hole (53) is radially provided through the retaining ring body (51).

2. A supersonic flame spraying device, characterized in that, It includes a support cylinder (2) inserted into the inner cavity of a part on the outer circular surface. The other end of the support cylinder (2) is fixed in a chuck (1). The part on the outer circular surface includes a tail-end part, and the tail-end part includes ear pieces. A retaining block (4) is sleeved on the outer periphery of the part on the outer circular surface. The retaining block (4) abuts against the outside of the ear pieces. The retaining ring (5) described in claim 1 is sleeved on the outer periphery of the part on the outer circular surface and covers the outside of the groove of the part on the outer circular surface. It further includes a top cap (7) inserted into the other end of the inner cavity of the part on the outer circular surface. The outer end of the top cap (7) abuts against a top seat (8). Preferably, the width of the retaining ring body (51) is 1 - 4 mm greater than the width of the groove of the part on the outer circular surface, and the circular groove (52) is installed near the spraying side.

3. The supersonic flame spraying device according to claim 2, characterized in that, The support cylinder (2) includes a support cylinder body (21). A groove (22) is provided at one end on the outer side of the support cylinder body (21), and the other end includes an insertion part (23). A chamfer part (24) is provided inside the insertion part (23); preferably, the angle α between the chamfer part (24) and the horizontal plane is 20° - 40°, the length of the insertion part (23) is 30 - 50 mm, and the length of the groove (22) is 80 - 120 mm.

4. The supersonic flame spraying device according to claim 2, characterized in that The retaining block (4) includes a circular tube part (41) and a shielding cover (42) fixedly connected to the top of the circular tube part (41). On one side of the inner surface of the circular tube part (41), a circle of chamfers (43) is provided, and the angle of the chamfer (43) is 30° - 60°, and the chamfer (43) is installed near the spraying side.

5. The supersonic flame spraying device according to claim 4, characterized in that The shielding cover (42) covers the outside of the ear pieces.

6. The supersonic flame spraying device according to claim 4, wherein 30° - 60° chamfers are provided on the outside of the shielding cover (42).

7. The supersonic flame spraying device according to claim 4, wherein The top cap (7) includes a frustum part (71) and a cylindrical part (72), and the angle between the height of the frustum part (71) and the cylindrical part (72) is 20° - 40°.

8. The supersonic flame spraying device according to claim 7, wherein, The height of the cylindrical part (72) is 3 - 8 mm.

9. The supersonic flame spraying device according to claim 7, characterized in that, A frustum hole (73) is provided on one side of the cylindrical part (72), and the frustum hole (73) abuts against the top seat (8).

10. A supersonic flame spraying method for the supersonic flame spraying device according to any one of claims 2-9, characterized in that It includes the following steps: S1. Install the retaining block at the root of the flame spraying surface of the part, fit it with the ear piece part and fix it; S2. Install the retaining ring at the head of the flame spraying surface and fix it; S3. Fix the groove of the support cylinder in the chuck and tighten it; S4. Lift the part on the outer circular surface with the retaining block and the retaining ring to the middle position between the support cylinder and the center point of the top seat; S5. Insert the frustum part of the top cap into the inner hole at the rod end of the part on the outer circular surface, rotate the center point of the top seat to align with the frustum hole of the top cap, and fix the tooling and the part; S6. Start the flame spraying process of the part, and the spraying trajectory shall not exceed the retaining block and the retaining ring; After the flame spraying process of the outer cylindrical surface parts is completed, loosen the turntable center, remove the top cap, lift the flame-sprayed outer cylindrical surface parts to the transfer platform, remove the stop block, retaining ring and support sleeve, and reserve them for secondary use.

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