阅读说明：本技术 一种成形阶梯轴的三辊斜轧装置 (Three-roller skew rolling device for forming stepped shaft ) 是由 束学道 张松 王吉泰 夏迎香 叶曹棋 王英 徐海洁 殷安民 左锦荣 谢重阳 谯自 于 2021-10-26 设计创作，主要内容包括：本发明公开了一种成形阶梯轴的三辊斜轧装置,包括机架和三个轧辊,机架上固定设置有用于驱动轧辊旋转的轧辊转动驱动机构,特点是机架上固定设置有中间架板,中间架板上设置有三个相互独立且与轧辊一一对应的轧辊调节机构,轧辊调节机构用于调节轧辊的偏转角度和相对轧件的径向距离,机架上固定设置有轧件轴向牵引机构；优点是该三辊斜轧装置可调节轧辊的偏转角度,也可调节轧辊与轧件之间的径向距离,可轧制出不同规格的阶梯轴和直轴等,其通用性较好；而且轧辊调节机构可用于调节轧辊的偏转角度和相对轧件的径向距离,其结构紧凑,更重要的是该轧辊调节机构保证了对轧辊偏转角度调节的稳定性和可靠性,从而保证了轧件的表面成形质量。(The invention discloses a three-roller skew rolling device for forming stepped shafts, which comprises a rack and three rollers, wherein a roller rotation driving mechanism for driving the rollers to rotate is fixedly arranged on the rack, and the three-roller skew rolling device is characterized in that a middle frame plate is fixedly arranged on the rack, three roller adjusting mechanisms which are independent from each other and correspond to the rollers one by one are arranged on the middle frame plate, the roller adjusting mechanisms are used for adjusting the deflection angles of the rollers and the radial distances relative to rolled pieces, and a rolled piece axial traction mechanism is fixedly arranged on the rack; the three-roller skew rolling device has the advantages that the deflection angle of the roller can be adjusted, the radial distance between the roller and a rolled piece can also be adjusted, stepped shafts, straight shafts and the like with different specifications can be rolled, and the three-roller skew rolling device is good in universality; and the roller adjusting mechanism can be used for adjusting the deflection angle of the roller and the radial distance relative to a rolled piece, has compact structure, and more importantly, ensures the stability and the reliability of the adjustment of the deflection angle of the roller by the roller adjusting mechanism, thereby ensuring the surface forming quality of the rolled piece.)

1. The utility model provides a three-roller skew rolling device of shaping step shaft, includes frame and three roll, the frame on fixedly be provided with and be used for driving the rotatory roll rotation actuating mechanism of roll, its characterized in that: the frame on be fixed with middle frame plate, middle frame plate on be provided with three mutually independent and with the roll one-to-one roll adjustment mechanism, roll adjustment mechanism be used for adjusting the deflection angle of roll and the radial distance of relative rolled piece, the frame on be fixed with rolled piece axial drive mechanism.

2. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 1, wherein: the roller adjusting mechanism comprises a mounting seat and an adjusting rod, the mounting seat is fixed on the middle frame plate, a main shaft is coaxially and fixedly arranged on the roller, the adjusting rod is perpendicular to the main shaft, the lower end of the adjusting rod is rotatably connected with the main shaft, an adjusting rod rotating adjusting mechanism used for adjusting the rotating angle of the adjusting rod is arranged on the mounting seat, so that the adjusting rod rotating adjusting mechanism is used for adjusting the deflection angle of the roller relative to a rolling axis, and an adjusting rod moving driving mechanism used for driving the adjusting rod to move along the axial direction of the adjusting rod is arranged on the mounting seat, so that the radial distance of the roller relative to the rolling piece is adjusted.

3. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 2, wherein: adjusting lever rotate adjustment mechanism include apron, deflection regulating plate and two adjusting screw, the apron fix the mount pad on, the apron on the fixed two female thread flanges that are provided with, two adjusting screw one-to-one ground with female thread flange looks spiro union, adjusting screw's the inner an organic whole be provided with the bulb, the deflection regulating plate fix the regulation pole on, the deflection regulating plate on be provided with two vertical and follow the spout that the regulation pole symmetry set up, the spout in be provided with the slider, the slider with the vertical sliding fit of spout, the slider in be provided with the ball connecting hole, the bulb embedding the ball connecting hole in and rotate relatively.

4. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 2, wherein: the adjusting rod moving driving mechanism comprises a first servo electric cylinder, and an output shaft of the first servo electric cylinder is fixed with the adjusting rod.

5. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 2, wherein: the mounting seat is fixedly provided with a supporting block, the supporting block is fixedly provided with a guide sleeve, the adjusting rod axially penetrates through the guide sleeve, and the adjusting rod can rotate or axially move relative to the guide sleeve.

6. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 2, wherein: the lower end of the adjusting rod is fixedly provided with a connecting seat, and the main shaft penetrates through the connecting seat and is rotatably connected with the connecting seat through a bearing.

7. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 6, wherein: the bearing is a double-row tapered roller bearing.

8. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 2, wherein: the roller rotation driving mechanism comprises three motors fixed on the rack, and the motors are respectively connected with the main shafts on the three rollers in a one-to-one correspondence mode through telescopic universal joints.

9. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 1, wherein: rolled piece axial drive mechanism include second servo electric jar, pull rod, holder, chuck and pivot, the servo electric jar of second fix the frame on, the pull rod with the servo electric jar of second output shaft fixed mutually, the holder with the tip of pull rod fixed mutually, the frame on fixedly be provided with the guide arm, the holder with the horizontal sliding fit of guide arm, the one end of pivot with the holder pass through the bearing and rotate and connect, the other end of pivot pass through the flange with the coaxial fixed connection of chuck.

10. The three-roll skew rolling apparatus for forming a stepped shaft according to claim 9, wherein: the chuck is a three-jaw chuck or a four-jaw chuck.

Technical Field

The invention relates to a rolling technology of shaft parts, in particular to a three-roller skew rolling device for forming a stepped shaft.

Background

The skew rolling refers to rolling in which a rolled piece rotates, deforms and advances along the axis of the rolled piece between two or three rollers which have the same rotating direction and the longitudinal axes of which are mutually crossed (or inclined). The three-roller skew rolling technology is mainly applied to rolling and forming of the hollow long shaft piece. During rolling, three rollers of a three-roller skew rolling mill are required: (1) simultaneously, synchronously and equidirectionally rotating; (2) the deflection angle of the rolling shaft line is consistent so as to ensure the rolling force during rolling and the surface forming quality of a rolled piece. However, the deflection angle of the roller and the radial position along the rolled piece of the existing three-roller skew rolling mill are mostly unadjustable, so that the three-roller skew rolling mill has poor universality, cannot roll a stepped shaft, and can only process rolled pieces of one specification basically; in order to improve the universality of the skew rolling mill, a deflection adjusting mechanism and a radial moving mechanism of a roller are arranged on some three-roller skew rolling mills, but the three-roller skew rolling mills have complex structures, large occupied space of equipment and poor stability and reliability during adjustment.

Disclosure of Invention

The invention aims to solve the technical problem of providing a three-roller skew rolling device for forming a stepped shaft, which can adjust the deflection angle of a roller and can also drive the roller to move along the radial direction of a rolled piece so as to roll the rolled pieces with different specifications and shapes, such as the stepped shaft, so that the three-roller skew rolling device has better universality, the structure of a roller adjusting mechanism is simplified, the occupied space is reduced, and the stability and the reliability of the adjusting mechanism for adjusting the deflection angle of the roller are ensured.

The technical scheme adopted by the invention for solving the technical problems is as follows: the three-roller skew rolling device comprises a rack and three rollers, wherein a roller rotation driving mechanism used for driving the rollers to rotate is fixedly arranged on the rack, a middle frame plate is fixedly arranged on the rack, three roller adjusting mechanisms which are mutually independent and correspond to the rollers one to one are arranged on the middle frame plate, the roller adjusting mechanisms are used for adjusting the deflection angle of the rollers and the radial distance of a rolled piece, and a rolled piece axial traction mechanism is fixedly arranged on the rack.

Furthermore, the roller adjusting mechanism comprises a mounting seat and an adjusting rod, the mounting seat is fixed on the middle frame plate, a main shaft is coaxially and fixedly arranged on the roller, the adjusting rod is perpendicular to the main shaft, the lower end of the adjusting rod is rotatably connected with the main shaft, an adjusting rod rotation adjusting mechanism for adjusting the self-rotation angle of the adjusting rod is arranged on the mounting seat, so that the adjusting rod rotation adjusting mechanism is used for adjusting the deflection angle of the roller relative to the rolling axis of the rolled piece, and an adjusting rod movement driving mechanism for driving the adjusting rod to move along the axial direction of the adjusting rod is arranged on the mounting seat, so that the radial distance of the roller relative to the rolled piece is adjusted.

Further, the regulation pole rotate adjustment mechanism include apron, deflection regulating plate and two adjusting screw, the apron fix the mount pad on, the apron on the fixed two female thread flanges that are provided with, two adjusting screw one-to-one ground with female thread flange looks spiro union, adjusting screw's the inner an organic whole be provided with the bulb, the deflection regulating plate fix the regulation pole on, the deflection regulating plate on be provided with two vertical and follow the spout that the regulation pole symmetry set up, the spout in be provided with the slider, the slider with the vertical sliding fit of spout, the slider in be provided with the ball joint hole, the bulb embedding the ball joint hole in and can rotate relatively.

Furthermore, the adjusting rod movement driving mechanism comprises a first servo electric cylinder, and an output shaft of the first servo electric cylinder is fixed with the adjusting rod.

Furthermore, a supporting block is fixedly arranged on the mounting seat, a guide sleeve is fixedly arranged on the supporting block, the adjusting rod axially penetrates through the guide sleeve to play a role in positioning and supporting the adjusting rod, and the adjusting rod can rotate or axially move relative to the guide sleeve.

Furthermore, the lower end of the adjusting rod is fixedly provided with a connecting seat, and the main shaft penetrates through the connecting seat and is rotatably connected with the connecting seat through a bearing.

Furthermore, the bearing is a double-row tapered roller bearing, and during rolling, the double-row tapered roller bearing mainly bears the axial force and the radial force of the roller and is a main bearing part.

Furthermore, the roller rotation driving mechanism comprises three motors fixed on the rack, and the motors are respectively connected with the main shafts of the three rollers in a one-to-one correspondence mode through telescopic universal joints.

Further, rolled piece axial drive mechanism include the servo electric jar of second, pull rod, holder, chuck and pivot, the servo electric jar of second fix the frame on, the pull rod with the servo electric jar of second output shaft fixed mutually, the holder with the tip of pull rod fixed mutually, the frame on fixedly be provided with the guide arm, the holder with the horizontal sliding fit of guide arm, the one end of pivot with the holder pass through the bearing and rotate and be connected, the other end of pivot pass through the flange with the coaxial fixed connection of chuck.

Further, the chuck is a three-jaw chuck or a four-jaw chuck.

Compared with the prior art, the three-roller skew rolling device has the advantages that the deflection angle of the roller can be adjusted, the radial distance between the roller and a rolled piece can also be adjusted, stepped shafts, straight shafts and the like with different specifications can be rolled, and the three-roller skew rolling device is good in universality; and the roller adjusting mechanism can be used for adjusting the deflection angle of the roller and the radial distance relative to the rolled piece, has compact structure and small occupied space, and more importantly, the roller adjusting mechanism ensures the stability and the reliability of adjusting the deflection angle of the roller, thereby ensuring the surface forming quality of the rolled piece.

Drawings

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

FIG. 2 is a top view of the present invention;

FIG. 3 is a schematic perspective view of the roll adjustment mechanism of the present invention;

FIG. 4 is a half-sectional view of the roll adjustment mechanism of the present invention;

fig. 5 is a schematic view of the connection between the adjusting lever and the main shaft according to the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in the figure, the three-roller skew rolling device for forming the stepped shaft comprises a rack 1 and three rollers 2, wherein main shafts 21 are coaxially and fixedly arranged on the rollers 2, a roller rotation driving mechanism for driving the rollers to rotate is fixedly arranged on the rack 1, the roller rotation driving mechanism comprises three motors 3 fixed on the rack 1, and the three motors 3 are respectively connected with the main shafts 21 on the three rollers 2 in a one-to-one correspondence manner through telescopic universal joints 31; the frame 1 is fixedly provided with a middle frame plate 11, the middle frame plate 11 is provided with three mutually independent roller adjusting mechanisms A which are in one-to-one correspondence with the rollers 2, the roller adjusting mechanisms A are used for adjusting the deflection angle of the rollers 2 and the radial distance relative to a rolled piece, each roller adjusting mechanism A comprises an installation seat 4 and an adjusting rod 5, the installation seats 4 are fixed on the middle frame plate 11, the adjusting rods 5 are vertical to a main shaft 21, the lower end of each adjusting rod 5 is fixedly or integrally provided with a connecting seat 51, the main shaft 21 penetrates through the connecting seat 51 and is rotatably connected with the connecting seat 51 through a double-row tapered roller bearing 52, the double-row tapered roller bearing 52 mainly bears the axial force and the radial force during rolling and is a main bearing part, the installation seat 4 is provided with an adjusting rod rotation adjusting mechanism used for adjusting the self-rotation angle of the adjusting rod 5, so as to adjust the deflection angle of the rollers 2 relative to the rolling axis, the adjusting rod rotation adjusting mechanism comprises a cover plate 6, a deflection adjusting plate 61 and two adjusting screws 62, the cover plate 6 is fixed on the mounting seat 4, two internal thread flanges 63 are fixedly arranged on the cover plate 6, the two adjusting screws 62 are in threaded connection with the internal thread flanges 63 in a one-to-one correspondence manner, ball heads (not shown in the figure) are integrally arranged at the inner ends of the adjusting screws 62, the deflection adjusting plate 61 is fixed on the adjusting rod 5, two sliding grooves 64 which are vertical and symmetrically arranged along the adjusting rod 5 are arranged on the deflection adjusting plate 61, sliding blocks 65 are arranged in the sliding grooves 64, the sliding blocks 65 are in vertical sliding fit with the sliding grooves 64, spherical connecting holes 66 are arranged in the sliding blocks 65, and the ball heads are embedded in the spherical connecting holes 66 and can rotate relatively; the mounting seat 4 is provided with an adjusting rod movement driving mechanism for driving the adjusting rod 5 to move along the axial direction of the adjusting rod, so that the adjusting rod movement driving mechanism is used for adjusting the radial distance of the roller 2 relative to a rolled piece, the adjusting rod movement driving mechanism comprises a first servo electric cylinder 7, and an output shaft of the first servo electric cylinder 7 is fixed with the adjusting rod 5;

a rolled piece axial traction mechanism is fixedly arranged on the rack 1 and comprises a second servo electric cylinder 8, a pull rod 81, a retainer 82, a chuck 83 and a rotating shaft 84, the second servo electric cylinder 8 is fixed on the rack 1, the pull rod 81 is fixed with an output shaft of the second servo electric cylinder 8, the retainer 82 is fixed with the end part of the pull rod 81, a guide rod 12 is fixedly arranged on the rack 1, the retainer 82 is in horizontal sliding fit with the guide rod 12, one end of the rotating shaft 84 is rotatably connected with the retainer 82 through a bearing, and the other end of the rotating shaft 84 is coaxially and fixedly connected with the chuck 83 through a flange.

In the above embodiment, a supporting block 41 may be further fixedly disposed on the mounting seat 4 of the roller adjusting mechanism a, a guide sleeve 42 is fixedly disposed on the supporting block 41, the adjusting rod 5 axially penetrates through the guide sleeve 42, and the adjusting rod 5 is rotatable and axially movable relative to the guide sleeve 42 to perform positioning and supporting functions on the adjusting rod 5; in order to make the stress of the adjusting rod 5 more uniform during rolling, improve the stability of the rolling mill during rolling and reduce vibration, the adjusting rod 5 and the guide sleeve 42 can be connected through a flange type rolling spline pair.

In the above embodiment, the lower end of the adjusting rod 5 may be rotatably connected to the main shaft 21 by other conventional structures, and the chuck 83 may be a three-jaw chuck or a four-jaw chuck. The thread on the adjusting screw 62 is a thread capable of self-locking, and when the adjusting screw 62 stops rotating, the adjusting screw 62 is prevented from being shaken and retreated.

In the above embodiment, the adjusting method of the roller adjusting mechanism a of the three-roller skew rolling device is as follows: before rolling, simultaneously rotating the two adjusting screws 62 in opposite directions to enable one adjusting screw 62 to be pushed inwards and the other adjusting screw 62 to be withdrawn outwards, pushing the deflection adjusting plate 61 to rotate through the matching of the ball head and the sliding block 65 when the adjusting screws 62 are pushed inwards, driving the adjusting rod 5 to synchronously rotate around the axis of the deflection adjusting plate 61, namely, the adjusting rod 5 rotates automatically, driving the main shaft 21 to deflect by the adjusting rod 5, namely, the deflection angle of the roller 2 relative to the rolling axis of a rolled piece, and stopping rotating the two adjusting screws 62 when the deflection angle of the roller 2 is adjusted in place; when the stepped shaft needs to be rolled, during rolling, the first servo electric cylinder 7 drives the adjusting rod 5 to move along the radial direction of the rolled piece, the adjusting rod 5 drives the deflection adjusting plate 61 to move synchronously, at the moment, the cover plate 6 is fixed, the sliding block 65 is in sliding fit with the sliding groove 64 in the deflection adjusting plate 61, and the adjusting rod 5 penetrates through the guide sleeve 42 to drive the roller 2 to move along the radial direction of the rolled piece, namely, the radial distance between the roller 2 and the rolled piece is adjusted.

The scope of the present invention includes, but is not limited to, the above embodiments, and the scope of the present invention is defined by the appended claims, and any substitutions, modifications, and improvements that may occur to those skilled in the art are intended to fall within the scope of the present invention.