CN210754467U - Shaft part hot straightening machine for cross wedge rolling - Google Patents

Abstract

The utility model discloses an axle type spare hot straightening machine for cross wedge rolling relates to steel rolling technical field. The device comprises a first rail, a straightener, a tray, a transition plate and a second rail; the straightening machine comprises a power transmission mechanism, an upper fixed roll mechanism, a lower fixed roll mechanism and a movable roll mechanism, wherein the first rail is positioned below the lower fixed roll mechanism of the straightening machine, the tray is positioned under the movable roll mechanism in the straightening machine, the transition plate is positioned above the movable roll of the straightening machine and fixedly connected with a bracket of the second rail, and the second rail is positioned on the input side of a straightened piece of the straightening machine. The utility model discloses convenient operation, it is efficient to straighten, can straighten the product variety many, and no card material and hourglass school problem can continuous production.

Description

Shaft part hot straightening machine for cross wedge rolling

Technical Field

The utility model relates to a steel rolling technical field specifically indicates a cross wedge rolls with axle type spare hot straightener.

Background

Cross wedge rolling is a new steel rolling technology that appeared in 1961, and is suitable for rolling a variable-section revolving body. The two rollers with wedge hole patterns rotate in the same direction along the advancing direction of the wedge to gradually roll the blank into a variable-section revolving body. At present, hundreds of shaft parts and blanks thereof are produced by a cross wedge rolling process in many countries in the world.

The cross wedge rolling is mainly performed by hot rolling, intermediate shafts of heavy-duty car gearboxes and input shafts of car gearboxes are long, straightness of blank shafts rolled by the cross wedge rolling cannot meet customer requirements, a hot straightening machine is required to be used for hot straightening, and mass production can be met.

In the utility model patent with grant publication number CN2410057Y, the straightener is mainly by sending into the roller, send out the roller and float the pressure roller and constitute, rolled into the circular arc that sends into on sending into the roller along the deflector and send into type groove by the aligning piece, through rotating, be straightened in the cavity that the three-roller formed, send out type groove by the circular arc on sending out the roller and send out again, adopt this kind of aligning structure mode, it leaves type groove to utilize gravity and centrifugal force to be straightened the piece, but at the aligning in-process, by the aligning piece because inertia has not left yet and send into type groove and just has rotated 180 on sending into the roller, just so by the aligning piece easy card in type groove go out or directly fall the straightener below, cause card material and hourglass school, straightening inefficiency. The floating pressure roller adopts a high-pressure spring to adjust the distance between the pressure roller and the feeding roller and the distance between the pressure roller and the feeding roller as well as the feeding roller, the adjustment range is small, the straightening of various products cannot be realized, one machine cannot be used for multiple purposes, and the high-pressure spring provides unstable straightening pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a straightening machine for cross wedge rolling is provided, the installation is simple, convenient operation, and the straightening is efficient, can straighten the variety many, no card material with leak the school, but continuous production.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a hot straightening machine for a shaft part for cross wedge rolling comprises a first rail, a straightening machine, a tray, a transition plate and a second rail; the first rail is positioned below a lower fixed roll mechanism of the straightening machine, the tray is positioned right below a movable roll mechanism in the straightening machine, the transition plate is positioned above a movable roll of the straightening machine and fixedly connected with a bracket of the second rail, and the second rail is positioned at the input side of a straightened piece of the straightening machine;

the first rail comprises a rail panel, and a first supporting leg and a second supporting leg are welded below the rail panel;

the straightening machine comprises a first rack and a second rack, wherein the first rack and the second rack are both provided with a U-shaped groove with an upward opening and a U-shaped groove with a forward opening; the left ends of the upper fixed roll mechanism and the lower fixed roll mechanism are respectively positioned in a U-shaped groove with an upward opening of the first frame, the right ends of the upper fixed roll mechanism and the lower fixed roll mechanism are respectively positioned in a U-shaped groove with an upward opening of the second frame, and the lower fixed roll mechanism is positioned under the upper fixed roll mechanism; the left end of the movable roller mechanism is positioned in the U-shaped groove with the forward opening of the first frame, and the right end of the movable roller mechanism is positioned in the U-shaped groove with the forward opening of the second frame; the axes of the upper fixed roll mechanism, the lower fixed roll mechanism and the movable roll mechanism are parallel, and the shape of a cavity formed by the upper fixed roll, the lower fixed roll and the movable roll is matched with the shape of a straightened piece; one side of the first frame is provided with a power transmission mechanism;

a first connecting plate is fixed above a U-shaped groove with an upward opening of the first frame through bolts, a threaded hole matched with the first lead screw in size is formed in the middle of the first connecting plate, the upper portion of the first lead screw penetrates through the threaded hole, and the lower portion of the first lead screw is clamped with the upper portion of the first sliding block; a first cover plate is fixed at the front of the forward U-shaped groove of the opening of the first frame, and a piston rod of a first air cylinder penetrates through a through hole formed in the first cover plate and is fixedly connected with a second connecting seat;

a second connecting plate is fixed above the U-shaped groove with the upward opening of the second rack through bolts, a threaded hole matched with the second lead screw in size is formed in the middle of the second connecting plate, the upper portion of the second lead screw penetrates through the threaded hole, and the lower portion of the second lead screw is clamped with the upper portion of the second sliding block; a second cover plate is fixed at the front of the forward U-shaped groove of the opening of the second frame, and a piston rod of a second cylinder penetrates through a through hole formed in the second cover plate and is fixedly connected with the first connecting seat;

one end of an upper fixed roller in the upper fixed roller mechanism is positioned in a rolling bearing in a first sliding block, the first sliding block is positioned in a U-shaped groove with an upward opening of the first frame, a first outer transparent cover is fixed on one side of the first sliding block through bolts, and a first inner transparent cover is fixed on the other side of the first sliding block through bolts; the first sliding block, the first outer transparent cover and the first inner transparent cover form a groove and are clamped in the U-shaped groove with the upward opening of the first frame; the other end of the upper fixed roller is positioned in a rolling bearing in a second sliding block, one side of the second sliding block is fixedly provided with a second inner transparent cover by bolts, the other side of the second sliding block is fixedly provided with a first blank cover by bolts, and the second sliding block, the second inner transparent cover and the first blank cover form a groove and are clamped in a U-shaped groove with an upward opening of the second rack;

one side of a lower fixed roller in the lower fixed roller mechanism is positioned in a rolling bearing in a third sliding block, and the third sliding block is provided with a third sliding block

A second outer transparent cover is fixed on one side of the sliding block through a bolt, a third inner transparent cover is fixed on the other side of the sliding block through a bolt, and the third sliding block, the second outer transparent cover and the third inner transparent cover form a groove and are clamped in the U-shaped groove with the upward opening of the first frame; one side of a lower fixed roller of the lower fixed roller mechanism is positioned in a rolling bearing in a fourth sliding block, one side of the fourth sliding block is fixedly provided with a fourth inner transparent cover by bolts, the other side of the fourth sliding block is fixedly provided with a second blank cap by bolts, and the fourth sliding block, the fourth inner transparent cover and the second blank cap form a groove and are clamped in a U-shaped groove with an upward opening of the second frame;

one side of a movable roller of the movable roller mechanism is positioned in a rolling bearing in a fifth sliding block, one side of the fifth sliding block is fixedly provided with a third blank cap by a bolt, the other side of the fifth sliding block is fixedly provided with a fifth inner transparent cap by a bolt, the fifth sliding block, the third blank cap and the fifth inner transparent cap form a groove and are clamped in a U-shaped groove with a forward opening of the first frame, the middle part of the front of the fifth sliding block is provided with a second connecting seat, and the second connecting seat is connected with a second air cylinder fixed on a second support; the other side of the movable roller is positioned in a rolling bearing in a sixth sliding block, a sixth inner through cover is fixed to one side of the sixth sliding block through bolts, a fourth blank cover is fixed to the other side of the sixth sliding block through bolts, the sixth sliding block, the sixth inner through cover and the fourth blank cover form a groove and are clamped in a forward U-shaped groove of the opening of the second rack, a first connecting seat is fixed to the middle of the front of the sixth sliding block, and the first connecting seat is connected with a first air cylinder fixed to a first support;

the power transmission mechanism is positioned on the outer side of the straightening machine and comprises a speed reducer, an input shaft of the speed reducer is connected with an output shaft of a motor through a belt wheel by a belt, the output shaft of the speed reducer is connected with the lower fixed roll through a coupling, and the lower fixed roll and the upper fixed roll perform power transmission through gears;

the tray comprises a tray body, a first supporting block and a second supporting block are fixed on the upper surface of the tray body, the spacing distance between the first supporting block and the second supporting block is determined by the appearance of a piece to be straightened, a third connecting seat is fixedly connected to the lower surface of the tray body, the end of a piston rod of a third air cylinder is fixedly connected with the third connecting seat, the other end of the third air cylinder is fixedly connected with a third support, two sides of the tray body are respectively connected with slideways on two sides of a tray support in a sliding manner, and four support legs are fixedly connected to four corners below the slideways on two sides of the tray support;

the second track comprises a roller, two ends of the roller are respectively connected with a first bearing seat, and the first bearing seats are fixed on the support.

Preferably, T-shaped grooves are formed in the upper portions of the first sliding block and the second sliding block, the boss at the bottom of the first lead screw is clamped in the T-shaped groove of the first sliding block, and the boss at the bottom of the second lead screw is clamped in the T-shaped groove of the second sliding block.

Preferably, the first cylinder, the second cylinder and the third cylinder may be replaced with hydraulic cylinders.

Preferably, the first leg height of the first rail is less than the second leg height, and the rail panel

In an inclined state.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model discloses the input is equipped with second track and crosses the cab apron, makes the piece that is straightened conveniently get into the straightening machine and straightens, gets into the straightening machine after, is straightened the piece and falls on two tray pieces of tray, then the movable roll removes, presss from both sides tightly together with last fixed roll and lower fixed roll and is straightened the piece and begin to straighten, can not take place to leak school and card material problem, and the tray piece distance and the piece shape cooperation that is straightened, can play the positioning action to the piece that is straightened, improve straightening quality; after straightening is finished, firstly, the tray moves backwards, then the movable roller moves, the straightened piece is loosened, the straightened piece directly falls onto the inclined rail below the straightening machine, the straightened piece rolls along the inclined rail, blanking is automatically finished, and continuous production can be realized; additionally the utility model discloses the movable roll adopts the slider at cylinder promotion movable roll both ends, and movable roll displacement range is big, and two tray distances on the tray can be adjusted, can realize multiple product aligning to the aligning force ratio that provides is more stable, does benefit to and realizes continuous production, improves production efficiency.

Drawings

FIG. 1 is a schematic view of the general structure of the present invention;

FIG. 2 is a schematic view of the general structure of the straightening machine of the present invention;

FIG. 3 is a schematic view of the structure of an upper fixed roll of the straightening machine of the present invention;

FIG. 4 is a schematic view of the structure of a lower fixed roll of the leveler of the present invention;

FIG. 5 is a schematic view showing the structure of a movable roll of the leveler of the present invention;

fig. 6 is a schematic structural view of the tray of the present invention;

fig. 7 is a schematic view of a first track structure of the present invention;

in the figure, 1, a first track 101, a track panel 102, a first leg 103, a second leg 2, a straightener 21, a power transmission mechanism 2101, a motor 2102, a first belt pulley 2103, a first gear 2104, a second belt pulley 2105, a belt 2106, a speed reducer 2107, a coupling 1208, a first nut 2109, a second gear 22, an upper fixed roll mechanism 2201, a first outer transparent cover 2202, a first sliding block 2203, a first inner transparent cover 2204, an upper fixed roll 2205, a second inner transparent cover 2206, a second sliding block 2207, a first 220blank cover 8, a first bolt 23, a lower fixed roll mechanism 2301, a second outer transparent cover 2302, a third sliding block 2303, a third inner transparent cover 2304, a lower fixed roll 2305, a fourth inner transparent cover 2306, a fourth sliding block 2307, a second blank cover 2308, a second bolt 24, a movable roll mechanism 2401, a third blank cover 2402, a fifth sliding block 2403, A fifth inner transparent cover 2404, a movable roller 2405, a sixth inner transparent cover 2406,

A sixth slider 2407, a fourth blank cap 2408, a third bolt 2409, a first connecting seat 2410, a first air cylinder 2411, a first support 2412, a second support 2413, a second air cylinder 2414, a second connecting seat 26, a first connecting plate 27, a first screw rod 28, a second nut 29, a second connecting plate 210, a second screw rod 211, a third nut 212, a first machine frame 213, a first cover plate 214, a second machine frame 215, a second cover plate 3, a tray 301, a first supporting block 302, a second supporting block 303, a tray body 304, a tray support 305, a third connecting seat 306, a third air cylinder 307, a third support 4, a transition plate 5, a second track 501, a bearing seat 502, a roller 503 and a bracket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "above", "below", "left end", "right end", "left", "right", and the like are used for the positional relationship shown in the drawings, and are only for the convenience of describing the present invention, but not for indicating or implying a specific position, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1, a hot straightening machine for a cross wedge rolling shaft part comprises a first rail 1, a straightening machine 2, a tray 3, a transition plate 4 and a second rail 5; the first track 1 is positioned below a lower fixed roll mechanism 23 of the straightening machine 2, the tray 3 is positioned right below a movable roll mechanism 24 in the straightening machine 2, the transition plate 4 is positioned above the movable roll of the straightening machine 2 and is fixedly connected with a bracket 503 of a second track 5, and the second track is positioned at the input side of a straightened piece of the straightening machine 2;

referring to fig. 7, the first rail 1 comprises a rail panel 101, a first leg 102 and a second leg 103 are welded below the rail panel 101, the rail panel 101 is in an inclined state, the higher side of the rail panel is positioned below the lower fixed roller of the straightening machine, and a straightened piece can automatically roll along the first rail from high to low after falling into the first rail, so that a space is reserved for the straightened piece behind;

referring to FIGS. 2 to 5, the leveler 2 includes a first frame 212 and a second frame 214, each of the first frame 212 and the second frame 214 having a U-shaped groove with an upward opening and a U-shaped groove with a forward opening; upper fixed roll mechanism 22

The left ends of the lower fixed roll mechanisms 23 are respectively positioned in a U-shaped groove with an upward opening of the first machine frame 212, the right ends of the upper fixed roll mechanism 22 and the lower fixed roll mechanism 23 are respectively positioned in a U-shaped groove with an upward opening of the second machine frame 214, and the lower fixed roll mechanism 23 is positioned under the upper fixed roll mechanism 22; the left end of the movable roller mechanism 24 is positioned in the U-shaped groove with the opening of the first frame 212 facing forward, and the right end of the movable roller mechanism 24 is positioned in the U-shaped groove with the opening of the second frame 214 facing forward; the axes of the upper fixed roll mechanism 22, the lower fixed roll mechanism 23 and the movable roll mechanism 24 are parallel, and the shape of a cavity formed by the upper fixed roll 2204, the lower fixed roll 2304 and the movable roll 2404 is matched with the shape of a straightened piece; one side of the first frame 212 is provided with a power transmission mechanism 21;

a first connecting plate 26 is fixed above a U-shaped groove with an upward opening of the first frame 212 through bolts, a threaded hole matched with the first lead screw 27 in size is formed in the middle of the first connecting plate 26, the upper portion of the first lead screw 27 penetrates through the threaded hole, and the lower portion of the first lead screw 27 is clamped with the upper portion of the first sliding block 2202; a first cover plate 213 is fixed at the front of the forward U-shaped groove of the opening of the first frame 212, and a piston rod of a first air cylinder 2410 passes through a through hole of the first cover plate 213 and is fixedly connected with a second connecting seat 2414;

a second connecting plate 29 is fixed above a U-shaped groove with an upward opening of the second frame 214 through bolts, a threaded hole matched with the second lead screw 210 in size is formed in the middle of the second connecting plate 29, the upper portion of the second lead screw 210 penetrates through the threaded hole, and the lower portion of the second lead screw 210 is clamped with the upper portion of the second sliding block 2206; a second cover plate 215 is fixed at the front of the forward U-shaped groove of the opening of the second frame 214, and a piston rod of a second air cylinder 2413 passes through a through hole formed in the second cover plate 215 and is fixedly connected with the first connecting seat 2409;

t-shaped grooves are formed in the upper portions of the first slider 2202 and the second slider 2206, a boss at the bottom of the first lead screw 27 is clamped in the T-shaped groove of the first slider 2202, and a boss at the bottom of the second lead screw 210 is clamped in the T-shaped groove of the second slider 2202. The first lead screw 27 and the second lead screw 210 are rotated to drive the first sliding block 2202 and the second sliding block 2206 to move up and down;

referring to fig. 3, one end of an upper fixed roller 2204 in the upper fixed roller mechanism 22 is located in a rolling bearing in a first slider 2202, the first slider 2202 is located in a U-shaped groove with an upward opening in the first frame 212, one side of the first slider 2202 is fixed with a first outer transparent cover 2201 by bolts, and the other side of the first slider 2202 is fixed with a first inner transparent cover 2203 by bolts; the first slider 2202, the first outer transparent cover 2201 and the first inner transparent cover 2203 form a groove and are clamped in a U-shaped groove with an upward opening of the first frame 212; the other end of the upper fixed roller 2204 is positioned in a rolling bearing in a second sliding block 2206, one side of the second sliding block 2206 is fixed with a second inner transparent cover 2205 by bolts, the other side is fixed with a first blank cover 2207 by bolts, and the second sliding block 2206, the second inner transparent cover 2205 and the first blank cover 2207 are arranged on the second sliding block 2206

Forming a groove, which is clamped in a U-shaped groove with an upward opening of the second frame 214; one side of a lower fixed roller 2304 in the lower fixed roller mechanism 23 is positioned in a rolling bearing in a third sliding block 2302, one side of the third sliding block 2302 is fixed with a second outer transparent cover 2301 by bolts, the other side of the third sliding block 2302 is fixed with a third inner transparent cover 2303 by bolts, and the third sliding block 2302, the second outer transparent cover 2301 and the third inner transparent cover 2303 form a groove and are clamped in an upward U-shaped groove of the first frame 212; one side of a lower fixed roller 2304 of the lower fixed roller mechanism 23 is positioned in a rolling bearing in a fourth sliding block 2306, one side of the fourth sliding block 2306 is fixed with a fourth inner transparent cover 2305 by bolts, the other side of the fourth sliding block 2306 is fixed with a second blank cover 2307 by bolts, and the fourth sliding block 2306, the fourth inner transparent cover 2305 and the second blank cover 2307 form a groove and are clamped in a U-shaped groove with an upward opening of the second frame 214;

referring to fig. 5, one side of the movable roller 2404 of the movable roller mechanism 24 is located in a rolling bearing in the fifth slider 2402, one side of the fifth slider 2402 is fixed with a third blank cap 2401 by bolts, the other side of the fifth slider 2402 is fixed with a fifth inner through cap 2403 by bolts, the fifth slider 2402, the third blank cap 2401 and the fifth inner through cap 2403 form a groove, the groove is clamped in a U-shaped groove with a forward opening of the first frame 212, the middle part of the front surface of the fifth slider 2402 is provided with a second connecting seat 2414, and the second connecting seat 2414 is connected with a second air cylinder 2413 fixed on the second support 2412; the other side of the movable roller 2404 is positioned in a rolling bearing in a sixth sliding block 2406, one side of the sixth sliding block 2406 is fixed with a sixth inner through cover 2405 by bolts, the other side of the sixth sliding block 2406 is fixed with a fourth blank cover 2407 by bolts, the sixth sliding block 2406, the sixth inner through cover 2405 and the fourth blank cover 2407 form a groove, the groove is clamped in a forward U-shaped groove of an opening of the second frame 214, a first connecting seat 2409 is fixed in the middle of the front of the sixth sliding block 2406, and the first connecting seat 2409 is connected with a first air cylinder 2410 fixed on a first supporting seat 2411;

referring to fig. 1, the power transmission mechanism 21 is located outside a straightener 2 and comprises a speed reducer 2106, an input shaft of the speed reducer 2106 is connected with an output shaft of a motor 2101 through a belt pulley by a belt 2105, an output shaft of the speed reducer 2106 is connected with a lower fixed roller 2304 through a coupling 2107, and the lower fixed roller 2304 and an upper fixed roller 2204 are in power transmission through gears;

referring to fig. 6, the tray 3 includes a tray body 303, a first supporting block 301 and a second supporting block 302 are fixed on the upper surface of the tray body 303, the spacing distance between the first supporting block 301 and the second supporting block 302 is determined by the shape of a piece to be straightened, a third connecting seat 305 is fixedly connected below the tray body 303, the piston rod end of a third air cylinder 306 is fixedly connected with the third connecting seat 305, the other end of the third air cylinder 306 is fixedly connected with a third support 307, two sides of the tray body 303 are respectively connected with slideways at two sides of a tray support 304 in a sliding manner, and four support legs are fixedly connected with four corners below the slideways at two sides of the tray support 304;

the second track 5 comprises a roller 502, and the two ends of the roller 502 are respectively connected with a first bearing seat 501, a first shaft

The socket 501 is fixed to a bracket 503. The utility model discloses the theory of operation: firstly, a first supporting block 302 and a second supporting block 303 are adjusted and fixed according to the shape of a straightened piece, an operator hooks the heated straightened piece onto a transition plate 4 from a second rail 5, the straightened piece rolls into a straightening machine 2 from the transition plate 4 and falls on two supporting blocks of a tray 3, then air cylinders at two ends of a movable roller mechanism 24 move simultaneously to push sliding blocks at two ends of the movable roller mechanism 24 to slide along forward U-shaped grooves of openings of two frames respectively, the sliding blocks are close to an upper fixed roller mechanism 22 and a lower fixed roller mechanism 23 and clamp the straightened piece together with the upper fixed roller mechanism 22 and the lower fixed roller mechanism 23 to straighten, the straightened piece leaves the first supporting block 302 and the second supporting block 303, at the moment, a third air cylinder 306 connected with the tray 3 moves, the tray 3 moves backwards to empty the position below the straightened piece, the first rail 1 is exposed, and after straightening is finished, the first air cylinder 2410 and the second air cylinder 2413 move simultaneously, the movable roller mechanism 24 is driven to move backwards, the straightened piece falls into the first rail 1 below, and the straightened piece can automatically roll along the first rail 1 due to the fact that the first rail 1 has a certain inclination and falls into a charging basket at the other end of the first rail 1 or other bins for collecting finished products. While the straightened piece rolls on the first rail 1, the tray 301 is driven by the third air cylinder 306 to move forward to prepare for next straightening action, and the whole straightening process is completed, and the steps are repeated.

If the variety of the straightened piece is changed, the first connecting plate 26 and the second connecting plate 29 are firstly loosened, then the coupler 2107 is loosened, the left and right sliders of the upper fixed roller 2204 and the lower fixed roller 2304 respectively slide along the U-shaped grooves with the openings facing upwards of the first rack 212 and the second rack 214, so that the upper fixed roller mechanism 22 and the lower fixed roller mechanism 23 are detached from the straightening machine 2, then the upper fixed roller 2204 and the lower fixed roller 2304 are replaced, meanwhile, the first gear 2103 and the second gear 2109 connected to the upper fixed roller 2204 and the lower fixed roller 2304 are also required to be replaced, the stroke of the air cylinder is adjusted, and the movable roller can move to the position meeting the requirement of a new straightened piece. The distance and the size of the two support blocks on the tray body 301 are adjusted to be matched with the appearance of a new straightened piece, and the new straightened piece can be straightened after the adjustment is finished.

Claims (4)

1. A hot straightening machine for a shaft part for cross wedge rolling is characterized by comprising a first rail (1), a straightening machine (2), a tray (3), a transition plate (4) and a second rail (5); the first track (1) is positioned below a lower fixed roll mechanism (23) of the straightening machine (2), the tray (3) is positioned right below a movable roll mechanism (24) in the straightening machine (2), the transition plate (4) is positioned above the movable roll of the straightening machine (2) and is fixedly connected with a bracket (503) of the second track (5), and the second track is positioned at the input side of a straightened piece of the straightening machine (2);

the first rail (1) comprises a rail panel (101), and a first leg (102) and a second leg (103) are welded under the rail panel (101);

the straightening machine (2) comprises a first rack (212) and a second rack (214), and the lower fixed roll mechanism (23) is positioned right below the upper fixed roll mechanism (22); one end of the movable roller mechanism (24) is positioned in a U-shaped groove with a forward opening of the first frame (212), and the other end of the movable roller mechanism (24) is positioned in a U-shaped groove with a forward opening of the second frame (214); the axes of the upper fixed roll mechanism (22), the lower fixed roll mechanism (23) and the movable roll mechanism (24) are parallel, and the shape of a cavity formed by the upper fixed roll (2204), the lower fixed roll (2304) and the movable roll (2404) is matched with the shape of a straightened piece; one side of the first frame (212) is provided with a power transmission mechanism (21);

a first connecting plate (26) is fixed above a U-shaped groove with an upward opening of the first rack (212) through bolts, a threaded hole matched with the first lead screw (27) in size is formed in the middle of the first connecting plate (26), the upper portion of the first lead screw (27) penetrates through the threaded hole, and the lower portion of the first lead screw (27) is clamped with the upper portion of the first sliding block (2202); a first cover plate (213) is fixed at the front of the forward U-shaped groove of the opening of the first frame (212), and a piston rod of a first air cylinder (2410) passes through a through hole formed in the first cover plate (213) to be fixedly connected with a second connecting seat (2414);

a second connecting plate (29) is fixed above a U-shaped groove with an upward opening of the second rack (214) through bolts, a threaded hole matched with the second lead screw (210) in size is formed in the middle of the second connecting plate (29), the threaded hole penetrates through the upper portion of the second lead screw (210), and a second sliding block (2206) penetrates through the lower portion of the second lead screw (210)

The upper part is clamped; a second cover plate (215) is fixed at the opening of the second frame (214) towards the front of the forward U-shaped groove, and a piston rod of a second cylinder (2413) passes through a through hole formed in the second cover plate (215) and is fixedly connected with a first connecting seat (2409);

one end of an upper fixed roller (2204) in the upper fixed roller mechanism (22) is positioned in a rolling bearing in a first sliding block (2202), the first sliding block (2202) is positioned in a U-shaped groove with an upward opening of the first frame (212), one side of the first sliding block (2202) is fixed with a first outer transparent cover (2201) by bolts, and the other side of the first sliding block is fixed with a first inner transparent cover (2203) by bolts; the first sliding block (2202), the first outer transparent cover (2201) and the first inner transparent cover (2203) form a groove and are clamped in a U-shaped groove with an upward opening of the first rack (212); the other end of the upper fixed roller (2204) is positioned in a rolling bearing in a second sliding block (2206), one side of the second sliding block (2206) is fixedly provided with a second inner transparent cover (2205) by bolts, the other side of the second sliding block (2206) is fixedly provided with a first blank cover (2207) by bolts, and the second sliding block (2206), the second inner transparent cover (2205) and the first blank cover (2207) form a groove and are clamped in a U-shaped groove with an upward opening of the second rack (214);

one side of a lower fixed roller (2304) in the lower fixed roller mechanism (23) is positioned in a rolling bearing in a third sliding block (2302), one side of the third sliding block (2302) is fixed with a second outer transparent cover (2301) through a bolt, the other side of the third sliding block (2302) is fixed with a third inner transparent cover (2303) through a bolt, and the third sliding block (2302), the second outer transparent cover (2301) and the third inner transparent cover (2303) form a groove and are clamped in a U-shaped groove with an upward opening of the first frame (212); one side of a lower fixed roller (2304) of the lower fixed roller mechanism (23) is positioned in a rolling bearing in a fourth sliding block (2306), one side of the fourth sliding block (2306) is fixed with a fourth inner transparent cover (2305) through a bolt, the other side of the fourth sliding block (2306) is fixed with a second blank cover (2307) through a bolt, and the fourth sliding block (2306), the fourth inner transparent cover (2305) and the second blank cover (2307) form a groove and are clamped in a U-shaped groove with an upward opening of the second frame (214);

one side of a movable roller (2404) of the movable roller mechanism (24) is positioned in a rolling bearing in a fifth sliding block (2402), one side of the fifth sliding block (2402) is fixedly provided with a third blank cap (2401) through bolts, the other side of the fifth sliding block (2402) is fixedly provided with a fifth inner transparent cap (2403) through bolts, the fifth sliding block (2402), the third blank cap (2401) and the fifth inner transparent cap (2403) form a groove and are clamped in a U-shaped groove with a forward opening of the first rack (212), the middle part of the front of the fifth sliding block (2402) is provided with a second connecting seat (2414), and the second connecting seat (2414) is connected and fixed with a second air cylinder (2413) on the second supporting seat (2412); the other side of the movable roller (2404) is positioned in a rolling bearing in a sixth sliding block (2406), a sixth inner transparent cover (2405) is fixed on one side of the sixth sliding block (2406) through bolts, a fourth blank cap (2407) is fixed on the other side of the sixth sliding block (2406) through bolts, the sixth inner transparent cover (2405) and the fourth blank cap (2407) form a groove, and the groove is clamped in the groove

The opening of the second frame (214) is in a forward U-shaped groove, a first connecting seat (2409) is fixed in the middle of the front of the sixth sliding block (2406), and the first connecting seat (2409) is connected with a first air cylinder (2410) fixed on a first support (2411);

the power transmission mechanism (21) is positioned at the outer side of the straightening machine (2) and comprises a speed reducer (2106), an input shaft of the speed reducer (2106) is connected with an output shaft of a motor (2101) through a belt wheel by a belt (2105), an output shaft of the speed reducer (2106) is connected with the lower fixed roller (2304) through a coupling (2107), and the lower fixed roller (2304) and the upper fixed roller (2204) are in power transmission through gears;

the tray (3) comprises a tray body (303), a first supporting block (301) and a second supporting block (302) are fixed on the upper surface of the tray body (303), the spacing distance between the first supporting block (301) and the second supporting block (302) is determined by the shape of a straightened piece, a third connecting seat (305) is fixedly connected to the lower surface of the tray body (303), the piston rod end of a third cylinder (306) is fixedly connected with the third connecting seat (305), the other end of the third cylinder (306) is fixedly connected with a third support (307), two sides of the tray body (303) are respectively connected with the slideways on two sides of the tray support (304) in a sliding manner, and four support legs are fixedly connected to four corners below the slideways on two sides of the tray support (304);

the second rail (5) comprises a roller (502), two ends of the roller (502) are respectively connected with a first bearing seat (501), and the first bearing seats (501) are fixed on a support (503).

2. The hot straightening machine for the cross wedge rolling shaft parts as claimed in claim 1, wherein T-shaped grooves are formed above the first slider (2202) and the second slider (2206), a boss at the bottom of the first lead screw (27) is clamped in the T-shaped groove of the first slider (2202), and a boss at the bottom of the second lead screw (210) is clamped in the T-shaped groove of the second slider (2206).

3. The hot straightening machine for the shaft parts for cross wedge rolling according to claim 1, characterized in that the first cylinder (2410), the second cylinder (2413) and the third cylinder (306) are all replaced by hydraulic cylinders.

4. The hot straightening machine for the cross wedge rolling shaft parts according to claim 1, characterized in that the height of the first leg (102) of the first rail (1) is smaller than the height of the second leg (103), and the rail panel (101) is in an inclined state.

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