A flexible frictional additive repair device

Abstract

The application provides a flexible frictional additive repair device, wherein an annular groove is arranged on the working surface of a floating tool head, the axis of the annular groove coincides with the rotation axis of the floating tool head, and a plurality of uniformly arranged partitions are arranged radially at the annular groove. By using the scheme of the application, a high-performance additive blank with high tissue compactness and few quality defects can be obtained under large load holding, the additive blank has good flatness and uniformity, and the generation of a whole annular flash on the outer edge of the tool head can be effectively prevented, the amount of the flash generated on the outer edge of the tool head is small, and the cumbersome process of cleaning the flash is omitted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of friction additive manufacturing technology, in particular to a flexible friction additive manufacturing repair device. BACKGROUND

[0002] In order to obtain a high-performance blank with high tissue density and few quality defects under a large load holding, a method of friction additive manufacturing repair device was developed in the early stage (see document CN113977067A), the steps including: feeding the blank into the cavity of the mold below the floating tool head along the axial direction of the floating tool head; pre-compacting the blank; the floating tool head is pressed downward along the axial direction while rotating; the floating tool head moves upward along the axial direction away from the blank; repeat one or more times the previous steps.

[0003] The device used in the foregoing method belongs to a flexible friction additive manufacturing device, which includes an upper mold frame, a rotating mechanism, a floating tool head and a floating mechanism. The rotating mechanism rotates radially in the inner hole of the upper mold frame. The rotating mechanism drives the floating tool head below it to rotate radially through a transmission shaft. The upper mold frame does not rotate, and the rotating mechanism is axially fixed. The transmission shaft is axially separated from the rotating mechanism with a gap. The transmission shaft is externally sleeved with the floating mechanism. The transmission shaft and the floating tool head axially slide relative to each other under the driving of the floating mechanism. The floating mechanism includes a hydraulic cylinder and a bidirectional thrust angular contact bearing. The bidirectional thrust angular contact bearing is sleeved outside the transmission shaft, and its inner ring rotates with the transmission shaft. The hydraulic cylinder includes an annular cylinder body and an annular plunger. The annular cylinder body is fixedly connected to the outer ring of the bidirectional thrust angular contact bearing on the inside. The annular plunger is slidingly connected to the annular cylinder body at one end, and is fixedly connected to the upper mold frame at the other end. Only when the set rated pressure in the hydraulic cylinder is greater than the actual bearing capacity of the floating tool head, the annular cylinder body axially slides relative to the annular plunger.

[0004] However, there are still some problems in the friction additive manufacturing repair device / repair using the foregoing scheme. There are many flash in the friction additive manufacturing area, especially the whole ring-shaped flash on the outer edge of the tool head is wide and irregular in shape, and it is troublesome to clean the flash. This is also a common problem faced by currently commonly used additive devices. SUMMARY

[0005] The purpose of the present application is to provide a flexible friction additive manufacturing repair device, which can at least solve the technical problems mentioned in the background.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme.

[0007] The flexible frictional additive repair device comprises a fixed upper die frame, a rotating mechanism, a floating tool head and a floating mechanism, the rotating mechanism is capable of rotating in the hole of the upper die frame, the rotating mechanism drives the floating tool head below it to rotate through a transmission shaft, the transmission shaft is axially separated from the rotating mechanism and has a gap, the floating mechanism is sleeved outside the transmission shaft, and the transmission shaft and the floating tool head are capable of relatively sliding in the axial direction under the driving of the floating mechanism; wherein the floating mechanism comprises a hydraulic cylinder and a bidirectional thrust angular contact bearing, the bidirectional thrust angular contact bearing is sleeved outside the transmission shaft, and the inner ring of the bidirectional thrust angular contact bearing rotates with the transmission shaft; the hydraulic cylinder comprises an annular cylinder body and an annular plunger, the outer ring of the bidirectional thrust angular contact bearing is fixedly connected to the inner side of the annular cylinder body, one end of the annular plunger is slidably connected to the annular cylinder body, and the other end of the annular plunger is fixedly connected to the upper die frame; when the set rated pressure in the hydraulic cylinder is greater than the actual bearing capacity of the floating tool head, the annular cylinder body only relatively slides in the axial direction, and then the floating tool head relatively slides in the axial direction through the bidirectional thrust angular contact bearing; when the set rated pressure in the hydraulic cylinder is less than the actual bearing capacity of the floating tool head, the transmission shaft is in close contact with the rotating mechanism in the axial direction, and the floating tool head does not relatively slide in the axial direction; an annular groove is arranged on the working surface of the floating tool head, the axis of the annular groove coincides with the rotation axis of the floating tool head, and a plurality of uniformly arranged spacers are arranged in the radial direction at the annular groove, and the maximum arc length between adjacent spacers is not greater than 10 mm.

[0008] In order to more effectively prevent the flash from being generated, a plurality of clamping grooves are arranged on the side wall of the floating tool head in the axial direction, a spring is sleeved on the floating tool head and located above the clamping grooves, the lower end of the spring is connected to a ring plate, the upper end of the spring is limited, each spacer is clamped in the clamping groove and fixedly connected to the ring plate; when the floating tool head is in the working state, the spring is compressed, and the bottom end of the spacer is always in close contact with the surface of the workpiece.

[0009] Further, the inner concave areas on all the spacers are consistent with the arc surface of the annular groove, and the inner concave areas on the spacers serve as part of the annular groove.

[0010] Further, the outer contours of the middle and lower parts of all the spacers are flush with the outer cylindrical surface of the floating tool head.

[0011] In order to further improve the flatness and uniformity of the additive organization, a main feeding channel and 3-4 sub-feeding channels are arranged on the floating tool head, the main feeding channel communicates with the sub-feeding channels, and each sub-feeding channel has a material guiding area at the lower end.

[0012] In order to further improve the flatness and uniformity of the additive organization, a plurality of fan-shaped areas are arranged on the bottom end of the floating tool head and located inside the spacers, a strip-shaped groove is arranged in each fan-shaped area, and the strip-shaped grooves in adjacent fan-shaped areas are directed in different directions.

[0013] Preferably, the width of the strip-shaped groove is 2-3 mm, the depth is 1.5-2.5 mm, and the distance between adjacent strip-shaped grooves is not less than 5 mm; the width of the annular groove is 3-5 mm, and the depth is 3-5 mm.

[0014] To prevent this, a gap is provided on the spacer, and a snap ring is fitted on the floating tool head, the snap ring being fitted in the gap, the gap having a length of 10-15 mm, and the outer contour of the snap ring being flush with the outer cylindrical surface of the floating tool head.

[0015] Beneficial effects: By using the scheme of the present application, a high-performance additive billet with high tissue density, few quality defects, good flatness and uniformity can be obtained under large load holding, and the generation of a whole annular flash on the outer edge of the tool head can be effectively prevented, the amount of flash generated on the outer edge of the tool head is very small, even if there is a small amount of burr width, it is not more than 2 mm, and the cumbersome process of cleaning the flash is saved; during the work process, the spacer is always pressed against the workpiece surface by the elastic element, on the one hand, it can compensate for the gap caused by the floating of the floating tool head with the material (change of loading force), prevent the overflow of granular material, on the other hand, it can effectively block and separate the outwardly diffused granular material, thereby reducing the generation of flash and completely avoiding the formation of a whole annular flash. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Figure 1 is a schematic diagram of a flexible friction additive repair device in Embodiment 1;

[0017] Figure 2 , Figure 3 , Figure 4 Figure 2 is a schematic diagram of a tool head of the flexible friction additive repair device in Embodiment 1;

[0018] Figure 5 Figure 3 is a schematic diagram of a tool head cross-section of the flexible friction additive repair device in Embodiment 1;

[0019] Figure 6 Figure 4 is a schematic diagram of components (spacer and spring) of the tool head in Embodiment 1;

[0020] Figure 7 Figure 5 is a schematic diagram of a tool head cross-section of the flexible friction additive repair device in Embodiment 2. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, but the present application is not limited to these embodiments. Improvements made to the present application without departing from the principles thereof also fall within the scope of protection of the claims of the present application. Embodiment 1

[0022] In combination Figures 1 to 6As shown, a flexible friction additive repair device comprises a fixed upper die holder 1, a rotating mechanism 2, a floating tool head 3 and a floating mechanism 4, the rotating mechanism 2 is capable of rotating in the hole of the upper die holder 1, the rotating mechanism 2 drives the floating tool head 3 below it to rotate through a transmission shaft 5, the transmission shaft 5 is axially separated from the rotating mechanism 2 and has a gap, the floating mechanism 4 is sleeved outside the transmission shaft 5, and the transmission shaft 5 and the floating tool head 3 are capable of relatively sliding in the axial direction under the driving of the floating mechanism 4; wherein the floating mechanism 4 comprises a hydraulic cylinder and a bidirectional thrust angular contact bearing 6, the bidirectional thrust angular contact bearing 6 is sleeved outside the transmission shaft 5, and the inner ring of the bidirectional thrust angular contact bearing 6 rotates with the transmission shaft 5; the hydraulic cylinder comprises an annular cylinder body 8 and an annular plunger 9, the outer ring of the bidirectional thrust angular contact bearing 6 is fixedly connected to the inner side of the annular cylinder body 8, one end of the annular plunger 9 is slidably connected to the annular cylinder body 8, and the other end is fixedly connected to the upper die holder 1; when the set rated pressure in the hydraulic cylinder is greater than the actual bearing capacity of the floating tool head 3, the annular cylinder body 8 only relatively slides in the axial direction, and then the floating tool head 3 is driven by the bidirectional thrust angular contact bearing 6 to relatively slide in the axial direction; when the set rated pressure in the hydraulic cylinder is less than the actual bearing capacity of the floating tool head 3, the transmission shaft 5 is axially closely attached to the rotating mechanism 2, and the floating tool head 3 does not relatively slide in the axial direction; an annular groove 31 is arranged on the working surface of the floating tool head 3, the axis of the annular groove 31 coincides with the rotation axis of the floating tool head 3, and a plurality of uniformly arranged spacers 32 are arranged radially at the annular groove 31, and the maximum arc length between adjacent spacers 32 is not greater than 10 mm.

[0023] In the embodiment, a plurality of clamping grooves 33 are arranged axially on the side wall of the floating tool head 3, a spring 34 is sleeved on the floating tool head 3 and above the clamping grooves 33, the lower end of the spring 34 is connected to a ring plate 35, the upper end of the spring 34 is limited, each spacer 32 is clamped in the clamping groove 33 and fixedly connected to the ring plate 35; when the floating tool head 3 is in the working state, the spring 34 is compressed, and the bottom end of the spacer 32 is always tightly abutted against the surface of the workpiece; the inner concave area on all spacers 32 is consistent with the arc surface of the annular groove 31, and the inner concave area on the spacer 32 serves as part of the annular groove 31; the outer contour of the middle and lower parts of all spacers 32 is flush with the outer cylindrical surface of the floating tool head 3.

[0024] In the embodiment, a main feeding channel 39 and four sub-feeding channels 36 are arranged on the floating tool head 3, the main feeding channel 39 communicates with the sub-feeding channels 36, and each sub-feeding channel 36 has a material guiding area 37 at the lower end; a plurality of sector areas are arranged at the bottom end of the floating tool head 3 and inside the spacers 32, a strip-shaped groove 38 is arranged in each sector area, and the strip-shaped grooves 38 in adjacent sector areas are directed in different directions. The width of the strip-shaped groove 38 is 3 mm, the depth is 2 mm, and the spacing between adjacent strip-shaped grooves 38 is not less than 5 mm; the width of the annular groove 31 is 5 mm, and the depth is 3 mm. Embodiment 2

[0025] A flexible frictional additive repair device, with reference to embodiment 1, the main difference with embodiment 1 is that the combination of Figure 7 As shown in the drawings, a gap 40 is arranged on the spacer 32, and a snap ring 41 is sleeved on the floating tool head 3, the snap ring 41 is matched in the gap 40, the length of the gap 40 is 12mm, and the outer contour of the snap ring 41 is flush with the outer cylindrical surface of the floating tool head 3. With such structure, the radial outward movement of the spacer 32 can be avoided in the case of large radial swing of the spring 34, and the granular material can be effectively prevented from entering the clamping groove 33.

[0026] In the present application, the method of the frictional additive repair device refers to document CN113977067A, and the biggest improvement point compared with it is the optimization of the tool head. In the use process, high-performance additive blanks with high tissue density, few quality defects, good flatness and uniformity can be obtained under large load holding, and the generation of whole ring-shaped flash on the outer edge of the tool head can be effectively prevented. The amount of flash generated on the outer edge of the tool head is very small, even if there is a small amount of flash width, it is not more than 2mm, which saves the cumbersome process of cleaning the flash; in the frictional additive repair process, the spacer is always pressed against the workpiece surface by the elastic element (spring), which can compensate for the gap caused by the floating of the floating tool head with the material (change of loading force), prevent the overflow of granular material, and on the other hand, effectively block and separate the outwardly diffused granular material into multiple parts, actively crush the additive material that may become flash, and temporarily store the material by means of the annular groove and the strip-shaped groove, so as to reduce the generation of flash and completely avoid the formation of whole ring-shaped flash.

Claims

1. A flexible friction additive repair device, comprising a fixedly mounted upper mold frame (1), a rotating mechanism (2), a floating tool head (3), and a floating mechanism (4), wherein the rotating mechanism (2) is rotatable within the inner hole of the upper mold frame (1), the rotating mechanism (2) drives the floating tool head (3) below it to rotate via a transmission shaft (5), the transmission shaft (5) is axially separated from the rotating mechanism (2) and has a gap, and the floating mechanism (4) is sleeved on the outside of the transmission shaft (5), and the transmission shaft (5) and the floating tool head (3) are axially sliding relative to each other under the drive of the floating mechanism (4); wherein, The floating mechanism (4) includes a hydraulic cylinder and a double-acting thrust angular contact bearing (6). The double-acting thrust angular contact bearing (6) is sleeved on the outside of the transmission shaft (5), and the inner ring of the double-acting thrust angular contact bearing (6) rotates with the transmission shaft (5). The hydraulic cylinder includes an annular cylinder body (8) and an annular plunger (9). The outer ring of the double-acting thrust angular contact bearing (6) is fixedly connected to the inner side of the annular cylinder body (8). One end of the annular plunger (9) is slidably connected to the annular cylinder body (8), and the other end is fixedly connected to the upper mold frame (1). When the rated pressure set in the hydraulic cylinder is greater than the actual load-bearing capacity of the floating tool head (3), the annular cylinder body (8) slides axially relative to the floating tool head (3), thereby driving the floating tool head (3) to slide axially relative to the floating tool head (3) through the double-acting thrust angular contact bearing (6). When the rated pressure set in the hydraulic cylinder is less than the actual load-bearing capacity of the floating tool head (3), the transmission shaft (5) and the rotating mechanism (2) are axially tightly fitted. The floating tool head (3) does not slide relative to each other in the axial direction; characterized in that: an annular groove (31) is provided on the working surface of the floating tool head (3), the axis of the annular groove (31) coincides with the rotation axis of the floating tool head (3), and a number of evenly arranged partitions (32) are radially arranged at the annular groove (31), the maximum arc length between adjacent partitions (32) is not greater than 10mm; a number of slots (33) are axially arranged on the side wall of the floating tool head (3), and a spring (34) is sleeved on the floating tool head (3) and above the slots (33), the lower end of the spring (34) is connected to the ring plate (35), the upper end of the spring (34) is limited, and each partition (32) is fitted in the slot (33) and fixedly connected to the ring plate (35); when the floating tool head (3) is in the working state, the spring (34) is compressed, and the bottom end of the partition (32) is always pressed against the workpiece surface.

2. The flexible triboelectric additive repair device according to claim 1, characterized in that: The concave areas on all the partitions (32) are consistent with the arc surface of the annular groove (31), and the concave areas on the partitions (32) are part of the annular groove (31).

3. The flexible triboelectric additive repair device according to claim 2, characterized in that: The outer contours of the middle and lower parts of all the partitions (32) are flush with the outer circular surface of the floating tool head (3).

4. The flexible triboelectric additive repair device according to any one of claims 1-3, characterized in that: A main feed channel (39) and 3-4 distribution channels (36) are provided on the floating tool head (3). The main feed channel (39) is connected to the distribution channels (36), and each distribution channel (36) has a feeding area (37) at its lower end.

5. The flexible triboelectric additive repair device according to claim 4, characterized in that: Multiple sector areas are provided at the bottom of the floating tool head (3) and inside the partition (32), and each sector area is provided with a strip groove (38), with the strip grooves (38) in adjacent sector areas facing different directions.

6. The flexible triboelectric additive repair device according to claim 5, characterized in that: The width of the strip groove (38) is 2-3 mm and the depth is 1.5-2.5 mm, and the distance between adjacent strip grooves (38) is not less than 5 mm; the width of the annular groove (31) is 3-5 mm and the depth is 3-5 mm.

7. The flexible triboelectric additive repair device according to any one of claims 1-3, characterized in that: A notch (40) is provided on the partition (32), and a retaining ring (41) is fitted on the floating tool head (3). The retaining ring (41) fits in the notch (40), the length of the notch (40) is 10-15mm, and the outer contour of the retaining ring (41) is flush with the outer surface of the floating tool head (3).

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