Prestress structure of large press

Abstract

The utility model discloses a prestress structure of a large press, and relates to the technical field of stamping equipment. The device comprises a punching table; the bottom of the fixing frame is fixedly connected with the top of the punching table; the bottom of the mounting frame is fixedly connected with the top of the fixed frame, and a movable groove is formed in the wall of the mounting frame; the outer wall of the limiting device is fixedly connected with the outer wall of the mounting frame; the outer wall of the prestress device is in sliding connection with the outer wall of the limiting device, the prestress device and the limiting device are arranged, the gravity of a part of assemblies is dispersed through the cross beam, the gravity of the press machine assembly is resisted by additionally arranging the prestress steel bars, and meanwhile the two ends of the prestress device are continuously stressed by utilizing the gravity of the press machine assembly; and the prestress is used for resisting gravity, so that the loss of the mounting rack caused by the gravity is reduced, the mounting rack can be used for a longer time, and the purpose of enabling the large press machine to be used for a longer time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping equipment, in particular to a prestressed structure of a large press. Background Art

[0002] A large press is a mechanical device with powerful pressure output. It has a sturdy body structure and a sophisticated control system. It can apply enormous pressure to perform stamping, forging and other processing on various materials. It has a high nominal pressure, can handle large workpieces, and has the characteristics of high precision and high stability. It plays a key role in heavy industries such as automobile manufacturing, aerospace, etc.

[0003] In the existing technology, large presses are large-scale manufacturing equipment, and their own components are designed to meet the processing needs of large workpieces. Due to the heavy weight of the components of large presses, the material strength requirements of the structural components are relatively high. Even the strongest materials will still produce slight deformations under long-term stress. For rigid materials, even slight deformations can easily lead to overall damage to the structure, which in turn requires the large press to be shut down for maintenance. Utility Model Content

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the present invention to solve its technical problems is: a prestressed structure of a large press, comprising: a stamping table; a fixed frame, the bottom of the fixed frame is fixedly connected to the top of the stamping table; a mounting frame, the bottom of the mounting frame is fixedly connected to the top of the fixed frame, and a movable groove is provided in the wall of the mounting frame; a limiting device, the outer wall of the limiting device is fixedly connected to the outer wall of the mounting frame; a prestressed device, the outer wall of the prestressed device is slidably connected to the outer wall of the limiting device.

[0005] The top of the pressing block is fixedly connected to the bottom of the U-shaped plate, and the outer wall of the L-shaped connecting plate is slidably connected to the side wall inside the mounting bracket, and the gravity of the press assembly is utilized in conjunction with the limiting device to ensure that both ends of the prestressed device are continuously stressed, thereby continuously maintaining the prestress. By counteracting gravity through the prestress, the loss of gravity to the mounting bracket is slowed down, so that the mounting bracket can be used for a longer time.

[0006] Preferably, the prestressed device includes a cross beam, the inner wall of the cross beam is fixedly connected with a bent steel bar, both ends of the bent steel bar are fixedly connected with a connecting steel bar, the outer wall of the connecting steel bar is fixedly connected with an integration plate, the end of the connecting steel bar away from the bent steel bar is fixedly connected with a straight steel bar, the end of the straight steel bar away from the connecting steel bar is fixedly connected with a connecting block, the end of the connecting block away from the straight steel bar is fixedly connected with an inclined plate, the outer wall of the connecting block is slidably connected to the inner wall of the cross beam, the outer wall of the integration plate is slidably connected to the inner wall of the cross beam, the top of the cross beam is in contact with the bottom of the pressing block, and the bottom of the cross beam is fixedly connected to the top of the support block. A prestressed device is provided to disperse the gravity of a part of the components through the cross beam, and to counteract the gravity of the press components by adding prestressed steel bars.

[0007] The beneficial effects of the utility model are as follows:

[0008] 1. The utility model provides a prestressed device and a limit device, disperses the gravity of a part of the components through the crossbeam, and counteracts the gravity of the press components by adding prestressed steel bars. At the same time, the gravity of the press components is utilized to continuously stress both ends of the prestressed device, thereby continuously maintaining the existence of prestress. By counteracting gravity with prestress, the loss of the mounting frame due to gravity is reduced, so that the mounting frame can be used for a longer time and the downtime for maintenance is reduced.

[0009] 2. The present invention provides support for the prestressed device by setting a limit device, and uses the gravity of the installation component to clamp and fix the prestressed device to prevent the prestressed device from deflecting. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the main view of the utility model;

[0011] Figure 2 It is a cross-sectional view of the utility model;

[0012] Figure 3 It is a schematic diagram of the local structure of the transverse support frame of the utility model;

[0013] Figure 4 It is a structural schematic diagram of the prestressed device of the utility model.

[0014] In the figure: 1. Punching table; 2. Fixed frame; 3. Mounting frame; 4. Movable slot; 5. Limiting device; 6. Prestressing device; 51. Horizontal support frame; 52. L-shaped connecting plate; 53. U-shaped plate; 54. Tension spring; 55. Limiting ring; 56. Clamping block; 57. Support block; 61. Crossbeam; 62. Bending steel bar; 63. Connecting steel bar; 64. Integrated plate; 65. Straight steel bar; 66. Connecting block; 67. Inclined panel. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0016] Example: See Figure 1 - Figure 4 The utility model provides a technical solution: a prestressed structure of a large press, comprising: a stamping table 1; a fixed frame 2, the bottom of the fixed frame 2 is fixedly connected to the top of the stamping table 1; a mounting frame 3, the bottom of the mounting frame 3 is fixedly connected to the top of the fixed frame 2, and a movable groove 4 is opened in the wall of the mounting frame 3; a limiting device 5, the outer wall of the limiting device 5 is fixedly connected to the outer wall of the mounting frame 3; a prestressed device 6, the outer wall of the prestressed device 6 is slidably connected to the outer wall of the limiting device 5.

[0017] The limiting device 5 includes a transverse support frame 51, the outer wall of the transverse support frame 51 is fixedly connected to the inner wall of the mounting frame 3, the inner wall of the mounting frame 3 is slidably connected with a U-shaped plate 53, the bottom of the U-shaped plate 53 is fixedly connected with an L-shaped connecting plate 52, the top of the U-shaped plate 53 is fixedly connected with a tension spring 54, the outer wall of the U-shaped plate 53 is slidably connected to a limiting ring 55, a pressing block 56 is provided below the limiting ring 55, and a supporting block 57 is provided below the pressing block 56. The outer wall of the supporting block 57 and the outer wall of the limiting ring 55 are both fixedly connected to the inner wall of the mounting frame 3, the top of the pressing block 56 is fixedly connected to the bottom of the U-shaped plate 53, the outer wall of the L-shaped connecting plate 52 is slidably connected to the side wall inside the mounting frame 3, and the prestressed device 6 is installed. The stress device is placed on the support block 57. During installation, the bottom inclined surface of the inclined panel 67 slides over the support block 57 and enters the gap between the mounting frame 3 and the support block 57. At this time, the stamping assembly is placed in. During the downward pressing process of the bottom of the stamping assembly, it will contact the L-shaped connecting plate 52. At this time, the tension spring 54 is stretched until the L-shaped connecting plate 52 contacts the transverse support frame 51. At this time, the top of the transverse support frame 51 is flush with the top of the bent surface of the L-shaped connecting plate 52. At the same time, the clamping block 56 on the U-shaped plate 53 falls, and the bottom of the clamping block 56 is attached to the top of the beam 61. The clamping block 56 close to the inner side wall of the mounting frame 3 will generate a thrust for the inclined panel 67 to expand toward the outside of the mounting frame 3 due to the inclined surface setting of the inclined panel 67.

[0018] The prestressed device 6 includes a crossbeam 61, the inner wall of the crossbeam 61 is fixedly connected with a bent steel bar 62, both ends of the bent steel bar 62 are fixedly connected with a connecting steel bar 63, the outer wall of the connecting steel bar 63 is fixedly connected with an integrated plate 64, the end of the connecting steel bar 63 away from the bent steel bar 62 is fixedly connected with a straight steel bar 65, the end of the straight steel bar 65 away from the connecting steel bar 63 is fixedly connected with a connecting block 66, the end of the connecting block 66 away from the straight steel bar 65 is fixedly connected with an inclined plate 67, the outer wall of the connecting block 66 is slidably connected to the inner wall of the crossbeam 61, the outer wall of the integrated plate 64 is slidably connected to the inner wall of the crossbeam 61, the top of the crossbeam 61 is in contact with the bottom of the pressing block 56, and the bottom of the crossbeam 61 is fixedly connected to the top of the support block 57 Next, the bent steel bar 62 is fixed in the middle of the inner wall of the beam 61 to prevent the internal steel bars of the beam 61 from being pulled out. Therefore, under the action of tension, the bent steel bar 62, the connecting steel bar 63 and the straight steel bar 65 all tend to deform, among which the bent steel bar 62 tends to change from bending to straightening. The curvature of the upper end of the bent steel bar 62 generates a thrust on the upper part of the beam 61. Similarly, the connecting steel bar 63 is in the same line as the tension at both ends of the steel bar, thereby driving the integrated plate 64 to generate an upward thrust, thereby causing the inner wall of the beam 61 to be subjected to an upward thrust. At this time, the beam 61 tends to bend due to the internal thrust, so that the beam 61 has a prestressed force to resist the gravity of the stamping component on the beam 61.

[0019] Working principle:

[0020] During use, when assembling a large press, it is preferred to combine the punching table 1 as the base, and gradually build the fixed frame 2 and the mounting frame 3 upwards, wherein the punching assembly of the press is installed in the mounting frame 3, and before installing the punching assembly, a prestressed device 6 is installed in the mounting frame 3. The prestressed device 6 provides support and limitation for the punching assembly. Before placing the punching assembly above the prestressed device 6, the installer will stretch the inclined panels 67 and the connecting blocks 66 at both ends of the beam 61. Due to the stretching of the connecting block 66, the paper steel bars inside the beam 61 are subjected to tension, which in turn affects the connecting steel bars 63 in the integrated plate 64. At this time, the two ends of the bent steel bars 62 are subjected to tension. Since the bent steel bars 62 are fixed to the middle of the inner wall of the beam 61 to prevent the steel bars inside the beam 61 from being pulled out, they are bent under the action of tension. The curved steel bars 62, the connecting steel bars 63 and the straight steel bars 65 all have a tendency to deform, among which the bent steel bars 62 have a tendency to change from being bent to being straight. The curvature of the upper end of the bent steel bars 62 generates a thrust on the upper part of the beam 61. Similarly, the connecting steel bars 63 are in the same straight line as the tension at both ends of the steel bars, thereby driving the integration plate 64 to generate an upward thrust, thereby causing the inner wall of the beam 61 to be pushed upward. At this time, the beam 61 tends to bend due to the internal thrust, thereby causing the beam 61 to have prestressed force to counteract the gravity of the stamping assembly on the beam 61. By adding a prestressed device 6 to the mounting frame 3, the components in contact with the stamping assembly have better pressure resistance, thereby delaying the deformation time of the mounting frame 3, and allowing the mounting frame 3 to be used for a longer time.

[0021] The limiting device 5 is set to support and clamp the prestressing device 6. When installing the prestressing device 6, the stressing device is placed on the support block 57. During installation, the bottom inclined surface of the inclined plate 67 slides over the support block 57 and enters the gap between the mounting frame 3 and the support block 57. At this time, the stamping assembly is put in. During the downward pressing process of the bottom of the stamping assembly, it will contact the L-shaped connecting plate 52. This is because when the tension spring 54 is in an unstretched state, it will drive the U-shaped plate 53 and the L-shaped connecting plate 52 to be above the horizontal support frame 51. When the stamping assembly falls, it presses the L-shaped connecting plate 52 downward, so the L-shaped connecting plate 52 drives the U-shaped plate 53 to It slides in the movable groove 4 and is limited by the limiting ring 55. At this time, the tension spring 54 is stretched until the L-shaped connecting plate 52 contacts the transverse support frame 51. At this time, the top of the transverse support frame 51 is flush with the top of the bent surface of the L-shaped connecting plate 52. At the same time, the clamping block 56 on the U-shaped plate 53 falls, and the bottom of the clamping block 56 fits against the top of the beam 61. The clamping block 56 close to the inner side wall of the mounting frame 3 will generate a thrust to expand the inclined plate 67 toward the outside of the mounting frame 3 due to the inclined surface setting of the inclined plate 67, so that the steel bars in the beam 61 are subjected to outward tension, so that the prestress is continuously maintained.

[0022] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A large press prestressed structure, characterized in that: include: Stamping table (1); A fixed frame (2), the bottom of the fixed frame (2) being fixedly connected to the top of the punching table (1); A mounting frame (3), the bottom of the mounting frame (3) being fixedly connected to the top of the fixed frame (2), and a movable groove (4) being provided in a wall of the mounting frame (3); A limiting device (5), wherein an outer wall of the limiting device (5) is fixedly connected to an outer wall of the mounting frame (3); A prestressing device (6), wherein the outer wall of the prestressing device (6) is slidably connected to the outer wall of the limiting device (5).

2. A large press prestressed structure according to claim 1, characterized in that: The limiting device (5) comprises a transverse support frame (51), the outer wall of the transverse support frame (51) is fixedly connected to the inner wall of the mounting frame (3), the inner wall of the mounting frame (3) is slidably connected to a U-shaped plate (53), the bottom of the U-shaped plate (53) is fixedly connected to an L-shaped connecting plate (52), the top of the U-shaped plate (53) is fixedly connected to a tension spring (54), the outer wall of the U-shaped plate (53) is slidably connected to a limiting ring (55), a pressing block (56) is provided below the limiting ring (55), and a supporting block (57) is provided below the pressing block (56).

3. A large press prestressed structure according to claim 2, characterized in that: The outer wall of the support block (57) and the outer wall of the limiting ring (55) are fixedly connected to the inner wall of the mounting frame (3), the top of the pressing block (56) is fixedly connected to the bottom of the U-shaped plate (53), and the outer wall of the L-shaped connecting plate (52) is slidably connected to the side wall inside the mounting frame (3).

4. A large press prestressed structure according to claim 2, characterized in that: The prestressed device (6) comprises a crossbeam (61), the inner wall of the crossbeam (61) is fixedly connected to a bent steel bar (62), both ends of the bent steel bar (62) are fixedly connected to connecting steel bars (63), the outer wall of the connecting steel bar (63) is fixedly connected to a connecting plate (64), the end of the connecting steel bar (63) away from the bent steel bar (62) is fixedly connected to a straight steel bar (65), the end of the straight steel bar (65) away from the connecting steel bar (63) is fixedly connected to a connecting block (66), and the end of the connecting block (66) away from the straight steel bar (65) is fixedly connected to an inclined plate (67).

5. A large press prestressed structure according to claim 4, characterized in that: The outer wall of the connecting block (66) is slidably connected to the inner wall of the crossbeam (61), and the outer wall of the integration plate (64) is slidably connected to the inner wall of the crossbeam (61).

6. The large press prestressed structure according to claim 4, characterized in that: The top of the crossbeam (61) contacts the bottom of the pressing block (56), and the bottom of the crossbeam (61) is fixedly connected to the top of the supporting block (57).

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