Special spinning chuck

Abstract

The application belongs to the technical field of spinning machine chucks, and particularly relates to a special spinning chuck, which comprises a chuck body, the chuck body comprises a connecting disc, one side of the connecting disc is provided with a disc body, a rear cover is fixedly connected between the connecting disc and the disc body, a plurality of wedge blocks in a circumferential array are fixedly installed on the inner side of the disc body, a sliding seat is slidably installed on each wedge block, a clamping jaw is fixedly installed on the side of the sliding seat away from the connecting disc, and the same pull sleeve is slidably installed on the side of the plurality of sliding seats close to the connecting disc. The reset mechanism can ensure that the plurality of clamping jaws can still move synchronously when each group of wedge blocks and sliding seats are worn to different degrees. In addition, when the pipe workpiece port is flame-heated spinning, the heat radiated to the chuck body by the flame and the heat conducted to the chuck body from the pipe workpiece can be reduced by cooperating with the air cooling mechanism, so that the chuck body is less affected by high temperature.

Description

Technical Field

[0001] This invention relates to the field of spinning machine chuck technology, and in particular to a special spinning chuck. Background Technology

[0002] In the spinning process, a clamping chuck is needed to fix the tubular workpiece to be clamped, so that the workpiece rotates with the spindle and feeds axially. Some existing tubular workpieces require flame heating at the end during spinning to facilitate shaping. However, the heat from the heating is easily transferred to the clamping chuck, which not only affects the subsequent running accuracy of the clamping chuck, but also affects the quality of its internal lubricant. In addition, the moving parts such as the slider guide rail in the clamping chuck are prone to uneven wear after long-term use, resulting in inconsistent clamping force of each jaw on the tubular workpiece. To prevent the above problems, a special spinning chuck is proposed. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention proposes a special spinning chuck.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a special spinning chuck, comprising a chuck body, the chuck body including a connecting plate, a disc body on one side of the connecting plate, a rear cover fixedly connected between the connecting plate and the disc body, multiple wedges arranged in a circumferential array fixedly installed inside the disc body, slide blocks slidably mounted on each of the multiple wedges, a jaw fixedly mounted on the side of the slide block away from the connecting plate, a common pull sleeve slidably mounted on the side of the multiple slide blocks near the connecting plate, a front cover fixedly mounted on the side of the pull sleeve away from the connecting plate, the multiple slide blocks being located between the front cover and the pull sleeve, a common reset mechanism mounted on the multiple jaws, the reset mechanism being used to make the multiple jaws move synchronously, and a wind-cooling mechanism being provided on the side of the reset mechanism away from the chuck body.

[0005] Preferably, the inner side of the disc body is provided with multiple mounting grooves arranged in a circumferential array, and multiple wedges are fixedly installed in the corresponding mounting grooves. The side of the pull sleeve is provided with multiple sliding grooves 1 and 2 arranged in a circumferential array, and the corresponding sliding grooves 1 and 2 are interconnected. Multiple wedges are respectively disposed in the corresponding sliding grooves 1 and multiple wedges are respectively slidably installed in the corresponding sliding grooves 2. Inclined grooves are provided on both sides of each wedge, and the slide block slides along the two inclined grooves.

[0006] Preferably, a push-pull ring is fixedly installed on the side of the slide groove near the connecting plate, a connecting sleeve is fixedly installed on the inner side of the push-pull ring, a dust cover is fitted on the outer side of the front cover, and the dust cover is fixedly connected to the plate body and the pull sleeve.

[0007] Preferably, a heat insulation plate is provided between the front cover and the pull sleeve, and a heat insulation plate is provided between the dust cover and the disc body.

[0008] Preferably, the reset mechanism includes an annular disk and guide rods fixedly connected to multiple claws. The multiple guide rods are conical and radial. Multiple linear bearings are fixedly installed through the annular disk in a circumferential array. The multiple linear bearings are slidably sleeved on the corresponding guide rods. Multiple spring telescopic rods are fixedly installed between the annular disk and the front cover in a circumferential array.

[0009] Preferably, the air-cooling mechanism includes a first annular plate and a second annular plate, with multiple blades arranged in a circumferential array fixedly installed between the first annular plate and the second annular plate, and the first annular plate being fixedly connected to the side of the annular disk away from the chuck body.

[0010] Preferably, the inner side of the second annular plate is provided with a second flow guide cone, and the inner side of the first annular plate is provided with a first flow guide cone. The first flow guide cone and the second flow guide cone are fixedly connected on their respective sides. The sides of the multiple blades that are close to the axis of the first flow guide cone and the second flow guide cone are all fixedly connected to the first flow guide cone and the second flow guide cone.

[0011] Preferably, the inner side of the annular plate one is provided with a flow guiding surface one, and a conical air duct one is formed between the flow guiding surface one and the flow guiding cone one; the inner side of the annular plate two is provided with a flow guiding surface two, and a conical air duct two is formed between the flow guiding surface two and the flow guiding cone two.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] By setting a reset mechanism, this invention can ensure that multiple jaws can still move synchronously when each set of wedges and slides experiences different degrees of wear. In addition, when the pipe workpiece is flame-heated and spun at the end, the heat radiated by the flame to the chuck body and the heat conducted from the pipe workpiece to the chuck body can be reduced by cooperating with the air-cooling mechanism, thereby reducing the impact of high temperature on the chuck body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a special spinning chuck proposed in this invention;

[0015] Figure 2 This is a side sectional view of the chuck body in a special spinning chuck proposed in this invention;

[0016] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0017] Figure 4 This is a partial exploded view of the chuck body in a special spinning chuck proposed in this invention;

[0018] Figure 5 This is an exploded view of the chuck body in a special spinning chuck proposed in this invention;

[0019] Figure 6 This is a schematic diagram of the reset mechanism and air-cooling mechanism in a special spinning chuck proposed in this invention;

[0020] Figure 7 This is a side sectional view of an air-cooling mechanism in a special spinning chuck proposed in this invention;

[0021] Figure 8 for Figure 7 A magnified structural diagram of part B.

[0022] In the diagram: 1. Chuck body; 11. Connecting disc; 12. Rear cover; 13. Disc body; 131. Mounting groove; 14. Wedge block; 141. Inclined groove; 15. Pull sleeve; 151. Slide groove one; 152. Slide groove two; 16. Slide seat; 17. Claw; 18. Connecting sleeve; 19. Push-pull ring; 110. Dust cover; 111. Front cover; 112. Heat insulation plate one; 113. Heat insulation plate two; 2. Reset mechanism; 21. Guide rod; 22. Annular disc; 23. Linear bearing; 24. Spring telescopic rod; 3. Air-cooling mechanism; 31. Annular plate one; 311. Guide surface one; 32. Blade; 33. Annular plate two; 331. Guide surface two; 34. Guide cone one; 35. Guide cone two; 36. Conical air duct one; 37. Conical air duct two. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please refer to Figures 1-8This invention provides a technical solution: a special spinning chuck, including a chuck body 1, the chuck body 1 including a connecting plate 11, a plate body 13 on one side of the connecting plate 11, a rear cover 12 fixedly connected between the connecting plate 11 and the plate body 13, a plurality of wedges 14 arranged in a circumferential array fixedly installed on the inner side of the plate body 13, a slide seat 16 slidably installed on each of the plurality of wedges 14, a claw 17 fixedly installed on the side of the slide seat 16 away from the connecting plate 11, the claw 17 being L-shaped, a pull sleeve 15 slidably installed on the side of the plurality of slide seats 16 near the connecting plate 11, a front cover 111 fixedly installed on the side of the pull sleeve 15 away from the connecting plate 11, the plurality of slide seats 16 being located between the front cover 111 and the pull sleeve 15, a same reset mechanism 2 installed on the plurality of claws 17, the reset mechanism 2 being used to make the plurality of claws 17 move synchronously, and a wind-cooling mechanism 3 being provided on the side of the reset mechanism 2 away from the chuck body 1.

[0025] The inner side of the disc body 13 has multiple mounting slots 131 arranged in a circular array. Multiple wedges 14 are fixedly installed in the corresponding mounting slots 131. The side of the pull sleeve 15 has multiple sliding grooves 151 and sliding grooves 152 arranged in a circular array. The corresponding sliding grooves 151 and sliding grooves 152 are interconnected. Multiple wedges 14 are respectively located in the corresponding sliding grooves 151 and are slidably installed in the corresponding sliding grooves 152. Both sides of the wedges 14 have inclined grooves 141. The slide block 16 slides along the two inclined grooves 141.

[0026] A push-pull ring 19 is fixedly installed on the side of the slide 151 near the connecting plate 11. A connecting sleeve 18 is fixedly installed on the inner side of the push-pull ring 19. A dust cover 110 is fitted on the outer side of the front cover 111. The dust cover 110 is fixedly connected to the plate body 13 and the pull sleeve 15.

[0027] A heat insulation plate 112 is provided between the front cover 111 and the pull sleeve 15, and a heat insulation plate 113 is provided between the dust cover 110 and the disc body 13.

[0028] Furthermore, by setting heat insulation plate 112 and heat insulation plate 113, the heat transfer can be blocked. When the pipe workpiece end needs to be spun during the flame heating process, heat insulation plate 112 and heat insulation plate 113 can reduce the heat radiated by the flame on the multiple wedges 14 and slides 16, so that they are not affected by high temperature. For example, grease needs to be used for lubrication between wedges 14 and slides 16, which can prevent the grease from being affected by high temperature.

[0029] The reset mechanism 2 includes an annular disk 22 and guide rods 21 fixedly connected to multiple claws 17. The multiple guide rods 21 are conical and radial. Multiple linear bearings 23 are fixedly installed through the annular disk 22 in a circular array. The multiple linear bearings 23 are slidably sleeved on the corresponding guide rods 21. Multiple spring telescopic rods 24 are fixedly installed between the annular disk 22 and the front cover 111 in a circular array.

[0030] Furthermore, as multiple jaws 17 move closer or further apart, the distance between the annular disk 22 and the chuck body 1 will change. Under long-term use, when wear occurs between a certain set of wedges 14 and slide 16, if only the push-pull adjustment ring 19 is used, the moving distance of the jaws 17 in that set will be different from the moving distance of the jaws 17 in other sets. At this time, with the cooperation of the annular disk 22, multiple sets of guide rods 21 and linear bearings 23, it can be ensured that the moving distance of each jaw 17 remains consistent.

[0031] The air-cooling mechanism 3 includes an annular plate 31 and an annular plate 33. Multiple blades 32 arranged in a circular array are fixedly installed between the annular plate 31 and the annular plate 33. The annular plate 31 is fixedly connected to the side of the annular disk 22 away from the chuck body 1.

[0032] The inner side of the annular plate 2 33 is provided with a flow guide cone 2 35, and the inner side of the annular plate 1 31 is provided with a flow guide cone 1 34. The flow guide cone 1 34 and the flow guide cone 2 35 are fixedly connected on the side close to each other. The side of the multiple blades 32 close to the axis of the flow guide cone 1 34 and the flow guide cone 2 35 are all fixedly connected to the flow guide cone 1 34 and the flow guide cone 2 35.

[0033] The inner side of the annular plate 31 is provided with a flow guide surface 311, and a conical air duct 36 is formed between the flow guide surface 311 and the flow guide cone 34. The inner side of the annular plate 33 is provided with a flow guide surface 331, and a conical air duct 37 is formed between the flow guide surface 331 and the flow guide cone 35.

[0034] Furthermore, such as Figure 7 and Figure 8 As shown, when the air-cooling mechanism 3 rotates clockwise, the annular plate 31 and the annular plate 33, together with multiple blades 32, can draw external air to the axis of the annular plate 31 and the annular plate 33. After the airflow hits the guide cone 34 and the guide cone 35, it will be guided to the conical air duct 36 and the conical air duct 37 and discharged. The airflow discharged from the conical air duct 37 will blow towards the port of the pipe workpiece to be spun, while the airflow discharged from the conical air duct 36 will be discharged from the annular disk 22 and blow towards the axis of the chuck body 1.

[0035] In this embodiment: During use, the connecting plate 11 is fixedly connected to the turntable of the spinning machine, and the push-pull ring 19 is connected to the turntable of the spinning machine through multiple hydraulic rods arranged in a circumferential array. During operation, the pipe workpiece passes through the chuck body 1, the reset mechanism 2 and the air-cooling mechanism 3. Then, the multiple hydraulic rods are controlled to pull the push-pull ring 19 to move towards the turntable. The push-pull ring 19 pulls the pull sleeve 15 to make multiple slides 16 slide on multiple wedges 14. Since the wedges 14 are inclined, the multiple slides 16 will approach each other during this process. The multiple slides 16 then drive the multiple chucks 17 to approach each other and clamp and fix the pipe workpiece.

[0036] As multiple jaws 17 approach each other, they will push the annular disk 22 away from the chuck body 1 through the cooperation of multiple sets of guide rods 21 and linear bearings 23. At this time, multiple spring telescopic rods 24 will be stretched and extended.

[0037] Subsequently, when spinning the pipe workpiece end, the spinning machine is started, causing the turntable to drive the chuck body 1 and the pipe workpiece fixed on it to rotate. When the air-cooling mechanism 3 rotates synchronously with the chuck body 1 and the reset mechanism 2, the external air will be drawn in by the air-cooling mechanism 3 and blown to both sides along the axis. When the spinning process encounters a pipe workpiece whose end needs to be heated by flame, the airflow from the chuck body 1 to the end can reduce the heat radiated by the flame to the chuck body 1. When the pipe workpiece is heated by flame, the heat directly conducted by the heated pipe workpiece to the multiple jaws 17 will cause the entire chuck body 1 to be heated. At this time, the airflow from the air-cooling mechanism 3 to the chuck body 1 will flow through the center of the chuck body 1, thereby carrying away some of the heat conducted by the pipe workpiece to the chuck body 1.

[0038] When the pipe workpiece end is spun, multiple hydraulic rods are controlled to pull the push-pull ring 19 away from the turntable. At this time, multiple slides 16 will move away from each other. Multiple slides 16 will then drive multiple chucks 17 to move away from each other and release the pipe workpiece. As the multiple chucks 17 approach each other, they will pull the annular disk 22 away from the chuck body 1 through the cooperation of multiple sets of guide rods 21 and linear bearings 23. At this time, the multiple stretched and extended spring telescopic rods 24 will return to their original positions.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A special spinning chuck comprising a chuck body (1), characterized in that: The chuck body (1) includes a connecting disc (11), one side of the connecting disc (11) is provided with a disc body (13), the connecting disc (11) and the disc body (13) are fixedly connected with a rear cover (12), a plurality of wedge blocks (14) distributed in a circumferential array are fixedly installed on the inner side of the disc body (13), a plurality of sliding seats (16) are slidably installed on the plurality of wedge blocks (14), a clamping jaw (17) is fixedly installed on the side of the sliding seat (16) away from the connecting disc (11), a plurality of sliding seats (16) are slidably installed on the side of the connecting disc (11) and are fixedly installed with a same pull sleeve (15) on the side of the pull sleeve (15) away from the connecting disc (11), a plurality of sliding seats (16) are located between the front cover (111) and the pull sleeve (15), a plurality of clamping jaws (17) are installed with a same reset mechanism (2), the reset mechanism (2) is used for synchronously moving the plurality of clamping jaws (17), and the side of the reset mechanism (2) away from the chuck body (1) is provided with an air cooling mechanism (3); A plurality of installation grooves (131) distributed in a circumferential array are formed on the inner side of the disc body (13), the plurality of wedge blocks (14) are fixedly installed in the corresponding installation grooves (131) respectively, a plurality of sliding grooves one (151) and sliding grooves two (152) distributed in a circumferential array are formed on the side of the pull sleeve (15), the corresponding sliding grooves one (151) and sliding grooves two (152) are communicated with each other, the plurality of wedge blocks (14) are arranged in the corresponding sliding grooves one (151) respectively, and the plurality of sliding seats (16) are slidably installed in the corresponding sliding grooves two (152) respectively, the two sides of the wedge block (14) are provided with inclined grooves (141), and the sliding seat (16) slides along the two inclined grooves (141); The reset mechanism (2) includes a plurality of guide rods (21) fixedly connected with the plurality of clamping jaws (17) and a ring-shaped disc (22), the plurality of guide rods (21) are radially arranged in a conical shape, a plurality of linear bearings (23) distributed in a circumferential array are fixedly installed in a penetrating mode on the ring-shaped disc (22), the plurality of linear bearings (23) are slidably sleeved on the corresponding guide rods (21) respectively, and a plurality of spring telescopic rods (24) distributed in a circumferential array are fixedly installed between the ring-shaped disc (22) and the front cover (111); The air cooling mechanism (3) includes a ring-shaped plate one (31) and a ring-shaped plate two (33), a plurality of blades (32) distributed in a circumferential array are fixedly installed between the ring-shaped plate one (31) and the ring-shaped plate two (33), and the ring-shaped plate one (31) is fixedly connected with the ring-shaped disc (22) on the side away from the chuck body (1). The inner side of the annular plate two (33) is provided with a flow guide cone two (35), the inner side of the annular plate one (31) is provided with a flow guide cone one (34), the flow guide cone one (34) and the flow guide cone two (35) are fixedly connected on the side close to each other, the flow guide cone one (34) and the flow guide cone two (35) are respectively provided with a connecting surface one (341) and a connecting surface two (351), and the plurality of blades (32) are fixedly connected with the connecting surface one (341) and the connecting surface two (351) on the side close to the shaft center of the flow guide cone one (34) and the flow guide cone two (35).

2. A special spinning chuck according to claim 1, characterized in that: The side, close to the connecting disc (11), of the sliding groove one (151) is fixedly installed with a push-pull ring (19), the inner side of the push-pull ring (19) is fixedly installed with a connecting sleeve (18), the outer side of the front cover (111) is sleeved with a dust cover (110), and the dust cover (110) is fixedly connected with the disc body (13) and the pull sleeve (15).

3. A special spinning chuck according to claim 2, characterized in that: The front cover (111) and the pull sleeve (15) are provided with a heat insulation plate one (112) therebetween, and the dust cover (110) and the disc body (13) are provided with a heat insulation plate two (113) therebetween.

4. A special spinning chuck according to claim 3, characterized in that: The inner side of the annular plate one (31) is provided with a flow guide surface one (311), a conical air duct one (36) is formed between the flow guide surface one (311) and the flow guide cone one (34), and the inner side of the annular plate two (33) is provided with a flow guide surface two (331).

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