Pressing structure of a metal material rotary drawing apparatus

Abstract

The utility model discloses a kind of pressing structure of metal material rotary stretching equipment, including rack, rotating support, pressing plate, lifting drive mechanism and rotary drive mechanism, lifting drive mechanism includes riser, guide rail, slider, slide, lifting cylinder, upper fixed plate, lower fixed plate, main shaft drive flange and adapter, upper fixed plate, lower fixed plate are horizontally installed on the slide, upper fixed plate is above lower fixed plate, upper fixed plate is equipped with the upper positioning through-hole of up-and-down trend, lower fixed plate is equipped with the lower positioning through-hole of up-and-down trend;The upper portion of main shaft drive flange is fixed with first connecting shaft, the lower portion of main shaft drive flange is equipped with rotatable second connecting shaft, first connecting shaft is in upper positioning through-hole, second connecting shaft is in lower positioning through-hole, the upper end of first connecting shaft is connected with the piston rod end of lifting cylinder by adapter, pressing plate is installed on the lower end of second connecting shaft. The utility model can guarantee coaxiality, improve metal product forming precision.

Description

Technical Field

[0001] This utility model relates to the field of metal material processing equipment technology, and in particular to a pressing structure of a metal material rotary stretching device. Background Technology

[0002] Rotary stretching of metal materials is a highly efficient metal plastic forming process that is widely used in aerospace, automobile manufacturing, medical devices and other fields. It applies pressure to rotating metal materials through forming wheels, causing the metal materials to gradually deform into the required cylindrical, conical, irregular and other rotating workpieces.

[0003] The pressing structure of existing metal material rotary stretching equipment mostly adopts a structure in which a lifting cylinder directly connects to a rotatable pressure plate and cooperates with a guide rail, slider, and slide block. The piston rod of the aforementioned lifting cylinder is only connected to the rotatable pressure plate at a single point. With the assistance of a single-sided guide rail and slide block, the pressure plate is prone to radial sway during the lifting process, making it difficult to ensure the coaxiality of the pressure plate and the rotating support below. This results in uneven pressure on the end face of the metal material, reducing the forming accuracy of the metal products. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a pressing structure for a metal material rotary stretching device. This pressing structure can ensure the coaxiality of the pressure plate and the rotating support, so that the metal material is pressed with uniform force and the forming accuracy of metal products is improved.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A pressing structure for a metal material rotary stretching device includes a frame, a rotary support, a pressure plate, a lifting drive mechanism for raising and lowering the pressure plate, and a rotation drive mechanism for rotating the rotary support. Both the lifting drive mechanism and the rotation drive mechanism are mounted on the frame, with the pressure plate positioned above the rotary support. The lifting drive mechanism includes a vertical plate, a guide rail, a slider, a slide block, and a lifting cylinder. The vertical plate is vertically mounted on the frame, the guide rail is mounted on the vertical plate in a vertical direction, the slider is positioned on the guide rail and can move up and down along the guide rail, the slide block is mounted on the slider, and the lifting cylinder is mounted on the frame, with the piston rod of the lifting cylinder extending downwards. The device is characterized by: The lifting drive mechanism further includes an upper fixed plate, a lower fixed plate, a main shaft drive flange, and an adapter. The upper fixed plate and the lower fixed plate are both horizontally mounted on the slide block, with the upper fixed plate positioned above the lower fixed plate. The upper fixed plate has an upper positioning through hole running vertically, and the lower fixed plate has a lower positioning through hole running vertically. A first connecting shaft is fixedly mounted on the upper part of the main shaft drive flange, and a rotatable second connecting shaft is mounted on the lower part of the main shaft drive flange. The first connecting shaft is located in the upper positioning through hole, and the second connecting shaft is located in the lower positioning through hole. The upper end of the first connecting shaft is connected to the end of the piston rod of the lifting cylinder via an adapter, and the pressure plate is mounted on the lower end of the second connecting shaft.

[0006] Lifting and clamping stage: First, the metal material is placed on the rotating support; the piston rod of the lifting cylinder extends downward, driving the first connecting shaft and the main shaft drive flange downward through the adapter; since the upper and lower fixed plates are fixed to the slide, the slide slides smoothly downward synchronously along the guide rail, driving the second connecting shaft and the pressure plate to descend synchronously until the pressure plate presses against the end face of the metal material on the rotating support, providing a stable axial clamping force. When lifting, the cylinder piston rod retracts, driving the entire structure to move upward along the guide rail to reset.

[0007] During the rotational processing stage: the rotational drive mechanism drives the rotating support to rotate synchronously with the metal material, and the metal material drives the pressure plate to rotate synchronously through friction; at this time, the second connecting shaft rotates together with the pressure plate on the main shaft drive flange, while the main shaft drive flange, the first connecting shaft and the piston rod of the lifting cylinder remain stationary.

[0008] The aforementioned rotary drive mechanism is existing technology and will not be described in detail here.

[0009] In a preferred embodiment, the inner wall of the lower positioning through hole is provided with a first annular limiting flange protruding inward at its center. A first ball bearing and a second ball bearing are installed in the lower positioning through hole. The second connecting shaft is provided with a second annular limiting flange and an external thread section. A lock nut is screwed onto the external thread section of the second connecting shaft, and the second annular limiting flange is positioned above the lock nut. The outer rings of the first ball bearing and the second ball bearing are both fixedly installed on the inner wall of the lower positioning through hole. The second connecting shaft is positioned sequentially from top to bottom within the inner rings of the first ball bearing and the second ball bearing. The connecting shaft is in close contact with the inner rings of the first and second ball bearings. The first ball bearing is positioned between the second and third annular limiting flanges, with the upper surface of its inner ring in close contact with the lower surface of the second annular limiting flange, and the lower surface of its outer ring in close contact with the upper surface of the first annular limiting flange. The second ball bearing is positioned between the first annular limiting flange and the locking nut, with the upper surface of its outer ring in close contact with the lower surface of the first annular limiting flange, and the lower surface of its inner ring in close contact with the locking nut. This arrangement allows the second and first annular limiting flanges to axially limit the first ball bearing, and the first annular limiting flange and the locking nut to axially limit the second ball bearing.

[0010] In a further preferred embodiment, the pressure plate has vertically oriented adsorption through-holes, the second connecting shaft has a first suction channel, and the lower fixed plate has a second suction channel. The air inlet of the second suction channel is located between the first and second ball bearings. The adsorption through-holes, the first suction channel, and the second suction channel are sequentially connected, and the outer end of the second suction channel is connected to a negative pressure generating mechanism. When the negative pressure generating mechanism is activated, a negative pressure is formed through the lower opening of the adsorption through-holes, creating an additional adsorption and fixing force on the upper surface of the metal material. Combined with the mechanical clamping force of the pressure plate, this increases the friction between the metal material and the pressure plate and the rotating support, effectively preventing radial slippage and circumferential movement of the metal material during rotary stretching processing, and ensuring that the metal material and the rotating support rotate strictly synchronously. The aforementioned negative pressure generating mechanism can be a blower, which is existing technology and will not be described in detail here.

[0011] In the preferred embodiment, the upright plate is provided with a crossbar, and a limiting cylinder is provided on the crossbar. The piston rod of the limiting cylinder extends upwards, and a first pad is provided at the end of the piston rod. The lower end of the slide is provided with a second pad corresponding to the first pad, and the second pad is positioned above the first pad. By rigidly abutting the first pad after the limiting cylinder extends against the second pad of the slide, a physical hard limit is formed, accurately locking the lowest descending position of the slide. The stroke accuracy is not affected by air pressure fluctuations, ensuring that the pressing position of the pressure plate is completely consistent each time. Moreover, the limiting cylinder has its own air buffering characteristics, which, together with the contact buffering of the pad, can absorb the inertial impact of the slide descending, avoiding a rigid hard collision between the slide and the limiting component.

[0012] In a preferred embodiment, the lower surface of the pressure plate is a plane. The plane of the pressure plate can fully contact the end face of the metal material, and the clamping force is evenly distributed in the contact area, without causing local stress concentration.

[0013] Compared with the prior art, this utility model has the following advantages: This utility model uses positioning holes on upper and lower double fixing plates to form two radial constraints, which limit the radial runout of the main shaft drive flange, ensure the coaxiality of the pressure plate and the rotating support, make the metal material be pressed evenly, and improve the forming accuracy of metal products. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 yes Figure 1 A schematic diagram of the structure of the second connecting shaft, the first ball bearing, and the second ball bearing; Figure 3 yes Figure 1 Schematic diagram of the middle and lower fixed plate. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0016] like Figure 1-3As shown, the pressing structure of the metal material rotary stretching device in this embodiment includes a frame, a rotary support 1, a pressure plate 2, a lifting drive mechanism 3 capable of driving the pressure plate 2 to rise and fall, and a rotation drive mechanism (not shown in the figure) capable of driving the rotary support 1 to rotate. Both the lifting drive mechanism 3 and the rotation drive mechanism are mounted on the frame, with the pressure plate 2 positioned above the rotary support 1. The lifting drive mechanism 3 includes a vertical plate 31, a guide rail 32, a slider 33, a slide block 34, a lifting cylinder 35, an upper fixed plate 36, a lower fixed plate 37, a main shaft drive flange 38, and an adapter 39. The vertical plate 31 is vertically mounted on the frame, the guide rail 32 is mounted vertically on the vertical plate 31, the slider 33 is located on the guide rail 32 and can move up and down along the guide rail 32, the slide block 34 is mounted on the slider 33, and the lifting cylinder 35... 5. The piston rod of the lifting cylinder 35 is installed on the frame with its extension direction facing downwards; the upper fixing plate 36 and the lower fixing plate 37 are both horizontally installed on the slide block 34, with the upper fixing plate 36 above the lower fixing plate 37. The upper fixing plate 36 has an upper positioning through hole 361 running vertically, and the lower fixing plate 37 has a lower positioning through hole 371 running vertically. The upper part of the main shaft drive flange 38 is fixedly provided with a first connecting shaft 381, and the lower part of the main shaft drive flange 38 is provided with a rotatable second connecting shaft 382. The first connecting shaft 381 is located in the upper positioning through hole 361, and the second connecting shaft 382 is located in the lower positioning through hole 371. The upper end of the first connecting shaft 381 is connected to the end of the piston rod of the lifting cylinder 35 through an adapter 39, and the pressure plate 2 is installed on the lower end of the second connecting shaft 382.

[0017] Lifting and pressing stage: First, the metal material is placed on the rotating support 1; the piston rod of the lifting cylinder 35 extends downward, driving the first connecting shaft 381 and the main shaft drive flange 38 downward through the adapter 39; since the upper and lower fixed plates 37 are fixed to the slide 34, the slide 34 slides smoothly downward synchronously along the guide rail 32, driving the second connecting shaft 382 and the pressure plate 2 to descend synchronously until the pressure plate 2 presses against the end face of the metal material on the rotating support 1, providing a stable axial pressing force. When lifting, the cylinder piston rod retracts, driving the entire structure to move upward along the guide rail 32 to reset.

[0018] During the rotational processing stage: the rotational drive mechanism drives the rotating support 1 to rotate synchronously with the metal material, and the metal material drives the pressure plate 2 to rotate synchronously through friction. At this time, the second connecting shaft 382 rotates together with the pressure plate 2 on the main shaft drive flange 38, while the main shaft drive flange 38, the first connecting shaft 381 and the piston rod of the lifting cylinder 35 remain stationary.

[0019] The aforementioned rotary drive mechanism is existing technology and will not be described in detail here.

[0020] The inner wall of the lower positioning through hole 371 is provided with an inwardly protruding first annular limiting flange 372. A first ball bearing 373 and a second ball bearing 374 are installed in the lower positioning through hole 371. The second connecting shaft 382 is provided with a second annular limiting flange 383 and an external thread section 384. A locking nut 385 is screwed onto the external thread section 384 of the second connecting shaft 382. The second annular limiting flange 383 is located above the locking nut 385. The outer rings of the first ball bearing 373 and the second ball bearing 374 are fixedly installed on the inner wall of the lower positioning through hole 371. The second connecting shaft 382 is located in the inner rings of the first ball bearing 373 and the second ball bearing 374 from top to bottom. The connecting shaft 382 is in close contact with the inner rings of the first ball bearing 373 and the second ball bearing 374; and the first ball bearing 373 is located between the second annular limiting flange 383 and the first annular limiting flange 372, the upper surface of the inner ring of the first ball bearing 373 is in close contact with the lower surface of the second annular limiting flange 383, and the lower surface of the outer ring of the first ball bearing 373 is in close contact with the upper surface of the first annular limiting flange 372; the second ball bearing 374 is located between the first annular limiting flange 372 and the locking nut 385, the upper surface of the outer ring of the second ball bearing 374 is in close contact with the lower surface of the first annular limiting flange 372, and the lower surface of the inner ring of the second ball bearing 374 is in close contact with the locking nut 385. With this configuration, the second annular limiting flange 383 and the first annular limiting flange 372 together axially limit the first ball bearing 373, and the first annular limiting flange 372 and the locking nut 385 together axially limit the second ball bearing 374.

[0021] The pressure plate 2 has vertically oriented adsorption through-holes 21, the second connecting shaft 382 has a first suction channel 387, and the lower fixed plate 37 has a second suction channel 386. The air inlet of the second suction channel 386 is located between the first ball bearing 373 and the second ball bearing 374. The adsorption through-holes 21, the first suction channel 387, and the second suction channel 386 are sequentially connected, and the outer end of the second suction channel 386 is connected to a negative pressure generating mechanism. When the negative pressure generating mechanism is activated, a negative pressure is formed through the lower opening of the adsorption through-holes 21, creating an additional adsorption and fixing force on the upper surface of the metal material. Combined with the mechanical clamping force of the pressure plate 2, this increases the friction between the metal material and the pressure plate 2 and the rotating support 1, effectively preventing radial slippage and circumferential movement of the metal material during rotary stretching processing, and ensuring that the metal material and the rotating support 1 rotate strictly synchronously. The aforementioned negative pressure generating mechanism can be a blower, which is existing technology and will not be described in detail here.

[0022] A horizontal bar 311 is provided on the upright plate 31, and a limiting cylinder 312 is provided on the horizontal bar 311. The piston rod of the limiting cylinder 312 extends upward, and a first pad 313 is provided at the end of the piston rod of the limiting cylinder 312. A second pad 341 corresponding to the first pad 313 is provided at the lower end of the slide 34, and the second pad 341 is located above the first pad 313. The first pad 313 after the limiting cylinder 312 extends rigidly abuts against the second pad 341 of the slide 34, forming a physical hard limit, accurately locking the lowest descending position of the slide 34. The stroke accuracy is not affected by air pressure fluctuations, ensuring that the position of the pressure plate is completely consistent each time. Moreover, the limiting cylinder 312 has its own air buffering characteristics, which, together with the contact buffer of the pad, can absorb the inertial impact of the slide 34 descending, avoiding a rigid hard collision between the slide 34 and the limiting component.

[0023] The lower surface of the pressure plate 2 is flat. The flat surface of the pressure plate 2 can fully contact the end face of the metal material, and the clamping force is evenly distributed in the contact area, without causing local stress concentration.

[0024] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, they should all fall within the protection scope of this utility model.

Claims

1. A pressing structure for a metal material rotary stretching device, comprising a frame, a rotary support, a pressure plate, a lifting drive mechanism capable of driving the pressure plate to rise and fall, and a rotation drive mechanism capable of driving the rotary support to rotate. Both the lifting drive mechanism and the rotation drive mechanism are mounted on the frame, with the pressure plate positioned above the rotary support. The lifting drive mechanism includes a vertical plate, a guide rail, a slider, a slide block, and a lifting cylinder. The vertical plate is vertically mounted on the frame, the guide rail is mounted on the vertical plate in a vertical direction, the slider is positioned on the guide rail and can move up and down along the guide rail, the slide block is mounted on the slider, and the lifting cylinder is mounted on the frame, with the piston rod of the lifting cylinder extending downwards. Its characteristic is that: The lifting drive mechanism also includes an upper fixed plate, a lower fixed plate, a main shaft drive flange, and an adapter. The upper fixed plate and the lower fixed plate are both horizontally mounted on the slide block, with the upper fixed plate positioned above the lower fixed plate. The upper fixed plate has an upper positioning through hole running vertically, and the lower fixed plate has a lower positioning through hole running vertically. A first connecting shaft is fixedly mounted on the upper part of the main shaft drive flange, and a rotatable second connecting shaft is mounted on the lower part of the main shaft drive flange. The first connecting shaft is located in the upper positioning through hole, and the second connecting shaft is located in the lower positioning through hole. The upper end of the first connecting shaft is connected to the end of the piston rod of the lifting cylinder via an adapter, and the pressure plate is mounted on the lower end of the second connecting shaft.

2. The pressing structure of the metal material rotary stretching device according to claim 1, characterized in that: The inner wall of the lower positioning through hole has a first annular limiting flange protruding inward at its center. A first ball bearing and a second ball bearing are installed in the lower positioning through hole. The second connecting shaft has a second annular limiting flange and an external thread section. A lock nut is screwed onto the external thread section of the second connecting shaft, and the second annular limiting flange is positioned above the lock nut. The outer rings of the first ball bearing and the second ball bearing are fixedly installed on the inner wall of the lower positioning through hole. The second connecting shaft is positioned sequentially from top to bottom within the inner rings of the first ball bearing and the second ball bearing. The first ball bearing is in close contact with the inner rings of the first and second ball bearings; the first ball bearing is located between the second annular limiting flange and the first annular limiting flange, the upper surface of the inner ring of the first ball bearing is in close contact with the lower surface of the second annular limiting flange, and the lower surface of the outer ring of the first ball bearing is in close contact with the upper surface of the first annular limiting flange; the second ball bearing is located between the first annular limiting flange and the locking nut, the upper surface of the outer ring of the second ball bearing is in close contact with the lower surface of the first annular limiting flange, and the lower surface of the inner ring of the second ball bearing is in close contact with the locking nut.

3. The pressing structure of the metal material rotary stretching device according to claim 2, characterized in that: The pressure plate is provided with an adsorption through hole running vertically, the second connecting shaft is provided with a first air extraction channel, the lower fixed plate is provided with a second air extraction channel, the air inlet end of the second air extraction channel is located between the first ball bearing and the second ball bearing, the adsorption through hole, the first air extraction channel and the second air extraction channel are connected in sequence, and the outer end of the second air extraction channel is connected to a negative pressure generating mechanism.

4. The pressing structure of the metal material rotary stretching device according to claim 1, characterized in that: The upright plate is provided with a crossbar, and a limiting cylinder is provided on the crossbar. The piston rod of the limiting cylinder extends upwards, and a first pad is provided at the end of the piston rod of the limiting cylinder. The lower end of the slide is provided with a second pad corresponding to the first pad, and the second pad is located above the first pad.

5. The pressing structure of the metal material rotary stretching device according to claim 1, characterized in that: The lower surface of the pressure plate is flat.

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