Forging equipment for controlling super-hard aluminum alloy 7050 large frame forgings

Abstract

The invention relates to the technical field of forging, in particular to forging equipment for controlling superhard aluminum alloy 7050 large frame forgings, which comprises a forging table main body, a clamping assembly, a traction assembly and a cleaning assembly, the clamping assembly is mounted on the forging table main body, the traction assembly is mounted on the forging table main body, and the cleaning assembly is mounted on the forging table main body. A cleaning assembly is mounted on one side of the forging table main body; the clamping assembly comprises a mounting groove, a first sliding groove, a second sliding groove, a first motor, a rotating shaft, a first gear, an elliptical wheel, a first guide rail, a first sliding plate, a first rack, a moving plate, a first clamping plate, a guide rod and a spring. The clamping assembly is adopted, when the large frame forging is clamped, driving can be conducted through a single driving structure, and therefore electricity consumption is reduced, and the using effect of the equipment is improved; and the traction assembly is adopted, the large frame forge piece can be automatically dragged, the forge piece is prevented from being manually pushed, the traction burden is reduced, and the traction effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of forging, and in particular to a forging device for controlling a large frame forging of a superhard aluminum alloy 7050. Background Art

[0002] In the forging process of large frames of super-hard aluminum alloy 7050, the following steps are usually used for processing: forging → trimming → solution treatment → cold deformation → aging; and forging equipment is required for processing; but when existing forging equipment clamps large frame forgings, it generally requires multiple drive structures to drive, which increases power consumption and reduces the use effect of the equipment, and generally does not have a traction structure. Due to the large size of large frame forgings, it is usually necessary to manually push the forgings, which increases the traction burden and reduces the traction effect. After the large frame forgings are hammered, a lot of waste chips will be generated, which generally requires manual auxiliary cleaning, which increases the cleaning burden and reduces the cleaning effect. Summary of the invention

[0003] The problem solved by the present invention is to provide a forging device for controlling large frame forgings of super-hard aluminum alloy 7050. When the large frame forgings are clamped, they can be driven by a single driving structure, thereby reducing power consumption and improving the use effect of the equipment. In addition, the large frame forgings can be automatically pulled to avoid manual pushing of the forgings, reducing the traction burden and improving the traction effect. After the large frame forgings are hammered, the waste chips on the equipment can be automatically cleaned, reducing the cleaning burden and improving the cleaning effect.

[0004] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme: a forging device for controlling a large frame forging of a superhard aluminum alloy 7050, comprising a forging table main body, a clamping assembly, a traction assembly and a cleaning assembly, wherein the forging table main body is equipped with a clamping assembly, the forging table main body is equipped with a traction assembly, and a cleaning assembly is installed on one side of the forging table main body;

[0005] The clamping assembly includes a mounting groove, a first slide groove, a second slide groove, a first motor, a rotating shaft, a first gear, an elliptical wheel, a first guide rail, a first slide plate, a first rack, a movable plate, a first clamping plate, a guide rod, a spring, an extrusion plate, a guide hole and a second clamping plate. A mounting groove is opened in the forging table body, and the first guide rail is symmetrically welded on the inner wall of the bottom end of the mounting groove, and the first slide plate is slidably connected in the first guide rail, and the first rack is welded on the top of the first slide plate. The first gear is meshed and installed between the first racks, and the middle part of the first gear is fixedly connected to the rotating shaft, and the first motor is inlaid and installed on the inner wall of the bottom end of the mounting groove, and the top end of the output shaft of the first motor is fixedly connected to the outer wall of the rotating shaft, and the top end of the first rack is welded with a movable plate, and the first slide groove is welded on the inner wall of the top end of the mounting groove corresponding to the position of the movable plate, and the first clamping plate is welded on the outer wall of the top end of the movable plate.

[0006] Preferably, a second clamping plate is symmetrically installed on the top of the forging table body corresponding to the position of the first clamping plate, an extrusion plate is welded on the outer wall of the bottom end of the second clamping plate, a second slide groove is opened on the inner wall of the top end of the mounting groove corresponding to the position of the extrusion plate, an elliptical wheel is fittedly connected between the extrusion plates, and the top of the rotating shaft is fixed to the outer wall of the elliptical wheel, guide rods are fixed to the inner walls on both sides of the mounting groove, guide holes are opened on the extrusion plate corresponding to the position of the guide rod, and springs are fixed between the extrusion plates.

[0007] Preferably, the traction assembly includes a movable groove, a second motor, a second gear, a second guide rail, a second slide plate, a second rack, a mounting frame, a lifting hole, a second cylinder, a lifting plate, a lifting rod and a third clamping plate. A movable groove is opened in the forging table main body, a second guide rail is welded on the top inner wall of the movable groove, a second slide plate is slidably connected in the second guide rail, a second rack is welded on the bottom outer wall of the second slide plate, a second gear is meshingly mounted on the bottom outer wall of the second rack, a second motor is inlaid and mounted on one side inner wall of the movable groove, and one end of the output shaft of the second motor is fixedly connected to the outer wall of the second gear, and a mounting frame is fixedly connected to one side of the second slide plate and the second rack.

[0008] Preferably, a second cylinder is embedded in the mounting frame, a lifting plate is fixedly connected to the bottom end of the telescopic rod of the second cylinder, lifting rods are symmetrically welded on the top outer wall of the lifting plate, lifting holes are symmetrically opened on the mounting frame corresponding to the positions of the lifting rods, and a third clamping plate is welded on the top outer wall of the lifting rod.

[0009] Preferably, the cleaning assembly includes a third motor, a third gear, a connecting block, a rotating hole, a rotating rod, a limit plate, a fourth gear and a cleaning plate. A connecting block is welded on an outer wall of one side of the forging table body, a rotating hole is opened on the connecting block, a rotating rod is rotatably connected in the rotating hole, a limit plate is symmetrically fixed to the position of the rotating rod corresponding to the rotating hole, a cleaning plate is installed on the top outer wall of the rotating rod, a fourth gear is fixed on the bottom outer wall of the rotating rod, the third gear is meshed and installed on the bottom end of the fourth gear, a third motor is inlaid and installed on one side of the forging table body, and one end of the output shaft of the third motor is fixed to the outer wall of the third gear.

[0010] Preferably, a display screen is inlaid and installed on one side of the forging table body, and buttons are distributed and installed on one side of the forging table body.

[0011] Preferably, a support frame is welded on one side outer wall of the forging table body, a first cylinder is embedded and installed on the top end of the support frame, and a forging hammer is fixedly connected to the bottom end of the telescopic rod of the first cylinder.

[0012] Preferably, the spring is sleeved on the outer wall of the guide rod.

[0013] Preferably, the third gear and the fourth gear are bevel gears, and the third gear is vertically meshed with the outer wall of the fourth gear.

[0014] The beneficial effects of the present invention are: the clamping assembly is adopted, and when a large frame forging is clamped, it can be driven by a single driving structure, thereby reducing power consumption and improving the use effect of the equipment;

[0015] The traction assembly is used to automatically pull large frame forgings, avoiding manual pushing of forgings, reducing the traction burden and improving the traction effect;

[0016] A cleaning component is used, which can automatically clean the waste chips on the equipment after the large frame forgings are hammered, reducing the cleaning burden and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall three-dimensional structure diagram of the present invention;

[0018] Figure 2 It is a side cutaway structural diagram of the present invention;

[0019] Figure 3 It is a three-dimensional internal structure diagram of the clamping assembly of the present invention;

[0020] Figure 4 It is a partial three-dimensional structural diagram of the clamping assembly of the present invention;

[0021] Figure 5It is a partial three-dimensional structural diagram of the traction assembly of the present invention;

[0022] Figure 6 It is a three-dimensional structural diagram of the cleaning component of the present invention.

[0023] Legend:

[0024] 1. Forging table body; 2. Clamping assembly; 3. Traction assembly; 4. Cleaning assembly; 5. Display screen; 6. Button; 7. Support frame; 8. First cylinder; 9. Forging hammer; 201. Mounting slot; 202. First slide slot; 203. Second slide slot; 204. First motor; 205. Rotating shaft; 206. First gear; 207. Elliptical wheel; 208. First guide rail; 209. First slide plate; 2010. First rack; 2011. Moving plate; 2012. First clamping plate; 2013. Guide rod; 2014. Spring; 2015. Extrusion plate; 2016, guide hole; 2017, second clamping plate; 301, moving groove; 302, second motor; 303, second gear; 304, second guide rail; 305, second slide plate; 306, second rack; 307, mounting frame; 308, lifting hole; 309, second cylinder; 3010, lifting plate; 3011, lifting rod; 3012, third clamping plate; 401, third motor; 402, third gear; 403, connecting block; 404, rotating hole; 405, rotating rod; 406, limiting plate; 407, fourth gear; 408, cleaning plate. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] See also Figure 1 to Figure 4A forging device for controlling large frame forgings of superhard aluminum alloy 7050 comprises a forging table main body 1, a clamping assembly 2, a traction assembly 3 and a cleaning assembly 4. The clamping assembly 2 is installed on the forging table main body 1, the traction assembly 3 is installed on the forging table main body 1, and the cleaning assembly 4 is installed on one side of the forging table main body 1; a display screen 5 is inlaid on one side of the forging table main body 1, and buttons 6 are distributed and installed on one side of the forging table main body 1, and the equipment can be operated by the buttons 6, and then the forging process can be displayed on the display screen 5; a support frame 7 is welded on the outer wall of one side of the forging table main body 1, and a first cylinder 8 is inlaid on the top of the support frame 7, and a forging hammer 9 is fixedly connected to the bottom end of the telescopic rod of the first cylinder 8, and the first cylinder 8 on the support frame 7 is started to make the forging hammer 9 forge the large frame forging;

[0028] The clamping assembly 2 includes a mounting groove 201, a first slide groove 202, a second slide groove 203, a first motor 204, a rotating shaft 205, a first gear 206, an elliptical wheel 207, a first guide rail 208, a first slide plate 209, a first rack 2010, a moving plate 2011, a first clamping plate 2012, a guide rod 2013, a spring 2014, an extrusion plate 2015, a guide hole 2016 and a second clamping plate 2017. The forging table body 1 is provided with a mounting groove 201, and the first guide rail 208 is symmetrically welded on the inner wall of the bottom end of the mounting groove 201. The first slide plate 209 is slidably connected in the first guide rail 208, and the top of the first slide plate 209 is welded with The first rack 2010 is meshed with the first gear 206, the middle of the first gear 206 is fixedly connected to the rotating shaft 205, the first motor 204 is embedded and installed on the inner wall of the bottom end of the installation groove 201, and the top end of the output shaft of the first motor 204 is fixedly connected to the outer wall of the rotating shaft 205, the top of the first rack 2010 is welded with a moving plate 2011, the top inner wall of the installation groove 201 is welded with a first slide groove 202 at the position of the moving plate 2011, and the top outer wall of the moving plate 2011 is welded with a first clamping plate 2012; the top of the forging table body 1 is symmetrically installed with a second clamping plate 2012 at the position corresponding to the first clamping plate 2012 017, a squeeze plate 2015 is welded on the outer wall of the bottom end of the second clamping plate 2017, a second slide groove 203 is opened on the inner wall of the top end of the mounting groove 201 corresponding to the squeeze plate 2015, an elliptical wheel 207 is fitted and connected between the squeeze plates 2015, and the top end of the rotating shaft 205 is fixedly connected to the outer wall of the elliptical wheel 207, guide rods 2013 are fixedly connected to the inner walls of both sides of the mounting groove 201, and guide holes 2016 are opened on the squeeze plate 2015 corresponding to the guide rod 2013. A spring 2014 is fixedly connected between the squeeze plates 2015, and the first motor 204 is started to reset the first gear 206 on the rotating shaft 205, so that the first rack 2010 The first slide plate 209 on the forging plate 2015 is reset along the first guide rail 208, and the movable plates 2011 on the two first clamping plates 2012 are moved away from each other along the first slide groove 202, and the elliptical wheel 207 is reset at the same time. At this time, under the action of the spring 2014, the guide holes 2016 on the extrusion plate 2015 are moved closer to each other along the guide rod 2013, and the second clamping plate 2017 is moved away from the forging; the spring 2014 is sleeved on the outer wall of the guide rod 2013. When the elliptical wheel 207 is reset, under the action of the spring 2014, the guide holes 2016 on the extrusion plate 2015 are moved closer to each other along the guide rod 2013.

[0029] Working principle: First, place the large frame forging on the forging table body 1, then start the first motor 204 to rotate the first gear 206 on the rotating shaft 205 by 90 degrees, so that the first slide 209 on the first rack 2010 moves along the first guide rail 208, so that the moving plates 2011 on the two first clamping plates 2012 move closer along the first slide groove 202, and at the same time drive the elliptical wheel 207 on the rotating shaft 205 to rotate by 90 degrees, and squeeze the extrusion plate 2015 through the raised part of the elliptical wheel 207, so that the guide holes 2016 on the extrusion plate 2015 move away from each other along the guide rod 2013, and the extrusion plates 2015 on the second clamping plate 2017 move away from each other along the second slide groove 203, and the large frame forging is pressed by the first clamping plate 2012 and the second clamping plate 2017. The first cylinder 8 on the support frame 7 is started to make the forging hammer 9 forge the large frame forging. When the forging is completed, the first motor 204 is started to reset the first gear 206 on the rotating shaft 205, and the first slide plate 209 on the first rack 2010 is reset along the first guide rail 208, and the moving plates 2011 on the two first clamping plates 2012 are moved away from each other along the first slide groove 202, and the elliptical wheel 207 is driven to reset at the same time. At this time, under the action of the spring 2014, the guide holes 2016 on the extrusion plate 2015 are moved closer to each other along the guide rod 2013, and the second clamping plate 2017 is moved away from the forging. When the large frame forging is clamped, it can be driven by a single driving structure, thereby reducing power consumption and improving the use effect of the equipment.

[0030] Embodiment 2

[0031] See also Figure 1 and Figure 5The traction assembly 3 includes a moving groove 301, a second motor 302, a second gear 303, a second guide rail 304, a second slide plate 305, a second rack 306, a mounting frame 307, a lifting hole 308, a second cylinder 309, a lifting plate 3010, a lifting rod 3011 and a third clamping plate 3012. A moving groove 301 is provided in the forging table body 1. A second guide rail 304 is welded on the top inner wall of the moving groove 301. A second slide plate 305 is slidably connected in the second guide rail 304. A second rack 306 is welded on the bottom outer wall of the second slide plate 305. A second gear 303 is meshedly installed on the bottom outer wall of the second rack 306. A second motor 302 is inlaid and installed on the inner wall of one side of the moving groove 301, and one end of the output shaft of the second motor 302 is fixedly connected to On the outer wall of the second gear 303, a mounting frame 307 is fixedly connected to one side of the second slide plate 305 and the second rack 306; a second cylinder 309 is inlaid and installed on the mounting frame 307, and a lifting plate 3010 is fixedly connected to the bottom end of the telescopic rod of the second cylinder 309, and lifting rods 3011 are symmetrically welded on the top outer wall of the lifting plate 3010, and lifting holes 308 are symmetrically opened on the mounting frame 307 corresponding to the positions of the lifting rods 3011, and a third clamping plate 3012 is welded on the top outer wall of the lifting rod 3011. The second cylinder 309 is started to make the lifting plate 3010 descend, and the lifting rod 3011 on the third clamping plate 3012 descends along the lifting hole 308 on the mounting frame 307, and the large frame forging is clamped by the third clamping plate 3012 and the mounting frame 307.

[0032] After some large frame forgings are forged, the second cylinder 309 is started to lower the lifting plate 3010, and the lifting rod 3011 on the third clamping plate 3012 is lowered along the lifting hole 308 on the mounting frame 307, and the large frame forgings are clamped by the third clamping plate 3012 and the mounting frame 307. At this time, the second motor 302 in the movable groove 301 is started to rotate the second gear 303, so that the second rack 306 on the second slide plate 305 moves along the second guide rail 304, and the large frame forgings are towed by the third clamping plate 3012 and the mounting frame 307. The large frame forgings can be automatically towed, avoiding manual pushing of the forgings, reducing the traction burden, and improving the traction effect.

[0033] Embodiment 3

[0034] See also Figure 2 and Figure 6The cleaning assembly 4 includes a third motor 401, a third gear 402, a connecting block 403, a rotating hole 404, a rotating rod 405, a limiting plate 406, a fourth gear 407 and a cleaning plate 408. A connecting block 403 is welded on the outer wall of one side of the forging table body 1. A rotating hole 404 is opened on the connecting block 403. A rotating rod 405 is rotatably connected in the rotating hole 404. The limiting plate 406 is symmetrically fixed to the rotating rod 405 at a position corresponding to the rotating hole 404. A cleaning plate 408 is installed on the outer wall of the top end of the rotating rod 405. The fourth gear 407 is fixed to the outer wall of the bottom end of the rotating rod 405. 7. The third gear 402 is meshed and installed at the bottom end of the fourth gear 407, and a third motor 401 is embedded and installed on one side of the forging table body 1, and one end of the output shaft of the third motor 401 is fixedly connected to the outer wall of the third gear 402; the third gear 402 and the fourth gear 407 are a kind of bevel gears, and the third gear 402 is vertically meshed with the outer wall of the fourth gear 407. Starting the third motor 401 rotates the third gear 402, rotates the fourth gear 407, and makes the rotating rod 405 on the limit plate 406 reciprocate along the rotating hole 404 on the connecting block 403.

[0035] After the large frame forging is forged, the third motor 401 is started to rotate the third gear 402, the fourth gear 407 is rotated, and the rotating rod 405 on the limit plate 406 is rotated reciprocatingly along the rotating hole 404 on the connecting block 403. The forging part is cleaned reciprocatingly by the cleaning plate 408, so that the waste chips are cleaned from the surface of the forging table body 1. After the large frame forging is hammered, the waste chips on the equipment can be automatically cleaned, which reduces the cleaning burden and improves the cleaning effect.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A forging device for controlling large frame forgings of superhard aluminum alloy 7050, characterized in that: The forging table comprises a forging table body (1), a clamping assembly (2), a pulling assembly (3) and a cleaning assembly (4); the clamping assembly (2) is installed on the forging table body (1), the pulling assembly (3) is installed on the forging table body (1), and the cleaning assembly (4) is installed on one side of the forging table body (1); The clamping assembly (2) comprises a mounting groove (201), a first slide groove (202), a second slide groove (203), a first motor (204), a rotating shaft (205), a first gear (206), an elliptical wheel (207), a first guide rail (208), a first slide plate (209), a first rack (2010), a moving plate (2011), a first clamping plate (2012), a guide rod (2013), a spring (2014), an extrusion plate (2015), a guide hole (2016) and a second clamping plate (2017); a mounting groove (201) is provided in the forging table body (1); a first guide rail (208) is symmetrically welded on the inner wall of the bottom end of the mounting groove (201); a first guide rail (208) is slidably connected in the first guide rail (208); A slide plate (209), a first rack (2010) is welded to the top of the first slide plate (209), a first gear (206) is meshed and installed between the first gears (2010), a rotating shaft (205) is fixedly connected to the middle of the first gear (206), a first motor (204) is embedded and installed on the inner wall of the bottom end of the installation groove (201), and the top end of the output shaft of the first motor (204) is fixedly connected to the outer wall of the rotating shaft (205), a moving plate (2011) is welded to the top of the first rack (2010), a first slide groove (202) is welded on the inner wall of the top end of the installation groove (201) at a position corresponding to the moving plate (2011), and a first clamping plate (2012) is welded to the outer wall of the top end of the moving plate (2011).

2. A forging device for controlling large frame forgings of superhard aluminum alloy 7050 according to claim 1, characterized in that: A second clamping plate (2017) is symmetrically mounted on the top of the forging table body (1) at a position corresponding to the first clamping plate (2012); an extrusion plate (2015) is welded on the outer wall of the bottom end of the second clamping plate (2017); a second slide groove (203) is provided on the inner wall of the top end of the mounting groove (201) at a position corresponding to the extrusion plate (2015); an elliptical wheel (207) is fitted between the extrusion plates (2015), and the top end of the rotating shaft (205) is fixedly connected to the outer wall of the elliptical wheel (207); guide rods (2013) are fixedly connected to the inner walls on both sides of the mounting groove (201); guide holes (2016) are provided on the extrusion plates (2015) at a position corresponding to the guide rods (2013); and springs (2014) are fixedly connected between the extrusion plates (2015).

3. The forging equipment for controlling large frame forgings of superhard aluminum alloy 7050 according to claim 1, characterized in that: The traction assembly (3) comprises a movable groove (301), a second motor (302), a second gear (303), a second guide rail (304), a second slide plate (305), a second rack (306), a mounting frame (307), a lifting hole (308), a second cylinder (309), a lifting plate (3010), a lifting rod (3011) and a third clamping plate (3012). The movable groove (301) is provided in the forging table body (1). The second guide rail (304) is welded on the inner wall of the top end of the movable groove (301). A second slide plate (305) is slidably connected inside the second guide rail (304), a second rack (306) is welded on the outer wall of the bottom end of the second slide plate (305), a second gear (303) is meshingly installed on the outer wall of the bottom end of the second rack (306), a second motor (302) is embedded and installed on the inner wall of one side of the movable groove (301), and one end of the output shaft of the second motor (302) is fixedly connected to the outer wall of the second gear (303), and a mounting frame (307) is fixedly connected to one side of the second slide plate (305) and the second rack (306).

4. A forging device for controlling large frame forgings of superhard aluminum alloy 7050 according to claim 3, characterized in that: A second cylinder (309) is inlaid and installed on the installation frame (307); a lifting plate (3010) is fixedly connected to the bottom end of the telescopic rod of the second cylinder (309); lifting rods (3011) are symmetrically welded on the top outer wall of the lifting plate (3010); lifting holes (308) are symmetrically opened on the installation frame (307) at positions corresponding to the lifting rods (3011); and a third clamping plate (3012) is welded on the top outer wall of the lifting rods (3011).

5. The forging equipment for controlling the large frame forging of superhard aluminum alloy 7050 according to claim 1, characterized in that: The cleaning assembly (4) comprises a third motor (401), a third gear (402), a connecting block (403), a rotating hole (404), a rotating rod (405), a limiting plate (406), a fourth gear (407) and a cleaning plate (408); a connecting block (403) is welded on an outer wall of one side of the forging table body (1); a rotating hole (404) is provided on the connecting block (403); a rotating rod (405) is rotatably connected in the rotating hole (404); and a rotating rod (405) is provided on the rotating rod (405). A limit plate (406) is symmetrically fixed to the position of the corresponding rotating hole (404); a cleaning plate (408) is installed on the top outer wall of the rotating rod (405); a fourth gear (407) is fixed to the bottom outer wall of the rotating rod (405); a third gear (402) is meshed and installed at the bottom end of the fourth gear (407); a third motor (401) is embedded and installed on one side of the forging table body (1), and one end of the output shaft of the third motor (401) is fixed to the outer wall of the third gear (402).

6. A forging device for controlling large frame forgings of superhard aluminum alloy 7050 according to claim 1, characterized in that: A display screen (5) is inlaid and installed on one side of the forging table body (1), and buttons (6) are distributed and installed on one side of the forging table body (1).

7. The forging equipment for controlling the large frame forging of superhard aluminum alloy 7050 according to claim 1, characterized in that: A support frame (7) is welded on one side outer wall of the forging table body (1), a first cylinder (8) is embedded and installed on the top of the support frame (7), and a forging hammer (9) is fixedly connected to the bottom end of the telescopic rod of the first cylinder (8).

8. The forging equipment for controlling large frame forgings of superhard aluminum alloy 7050 according to claim 2, characterized in that: The spring (2014) is sleeved on the outer wall of the guide rod (2013).

9. A forging device for controlling large frame forgings of superhard aluminum alloy 7050 according to claim 5, characterized in that: The third gear (402) and the fourth gear (407) are bevel gears, and the third gear (402) is vertically meshed with the outer wall of the fourth gear (407).

Images