CN116532911A - Rolling machining device with variable rolling depth - Google Patents

Abstract

The invention belongs to the technical field of other processing of metal, in particular to a rolling processing device with variable rolling depth, which solves the problems in the background technology and comprises a cutter body part and a connecting piece connected to the end part of a cutter handle; the cutter body part comprises a vertical movable rod, an upper bearing seat, a lower bearing seat, three rollers, three supporting blocks, a cylindrical retaining wall and an end cover; the cylinder type retaining wall is provided with three rectangular windows for accommodating rollers; the upper bearing seat, the lower bearing seat and the three supporting blocks are positioned in a cavity surrounded by the cylinder type retaining wall and the bottom wall of the connecting piece; the end cover is connected to the lower end of the cylindrical retaining wall for clamping the upper bearing block, the support block and the lower bearing block between the connecting piece and the end cover. By adjusting the extending distance of the roller and changing the rolling depth, the surface rolling processing of holes with different rolling depth requirements can be realized, and the processing requirement of a cutter facing a series of holes with different diameters can be met; the rolling processing efficiency is improved, and meanwhile, the application range of the rolling device is widened.

Description

A rolling processing device with variable rolling depth

technical field

The invention belongs to the technical field of other metal processing, and relates to rolling processing, in particular to a rolling processing device with variable rolling depth.

Background technique

Rolling processing technology is one of the most widely used processing technologies in the field of processing and manufacturing. However, with the rapid development of domestic aerospace, military, and automobile manufacturing, efficient processing has become an important demand for parts processing in the manufacturing industry. Therefore, the improvement and optimization of traditional processing tools is very important, and the replacement of rolling processing equipment is an inevitable trend. In the current rolling processing operation, the general rolling processing device can only perform rolling processing on the surface of the hole with the same rolling depth requirement. When the diameter of the hole to be processed changes, it is generally necessary to replace the rolling processing device, resulting in waste of resources. It is an urgent problem to be solved to provide a rolling processing device that can simultaneously meet the processing requirements of a series of holes with different diameters.

Contents of the invention

In order to solve the technical problem of how to provide a rolling processing device that can simultaneously meet the processing requirements of a series of holes with different diameters, the present invention provides a rolling processing device with variable rolling depth.

The invention discloses a rolling processing device with variable rolling depth, which comprises a cutter body part and a connecting piece fixedly connected to the end of a handle of a knife; the cutter body part includes a vertical movable rod, an upper bearing seat, a lower bearing seat, Three rollers, three support blocks, a cylindrical retaining wall and an end cap, a threaded through hole is opened on the axis of the connecting piece, the vertical movable rod is coaxial with the threaded through hole and includes the first rod section from top to bottom , the second rod section and the third rod section, the first rod section is screwed with the threaded through hole, the longitudinal section of the third rod section is drum-shaped, and the upper end of the cylindrical retaining wall is detachably and fixedly connected to the lower end of the connector The cylindrical retaining wall is evenly provided with three rectangular windows for accommodating the rollers along the circumferential direction. The height of the rectangular windows is adapted to the height of the rollers. The retaining wall includes an inner cylinder and an outer cylinder coaxially arranged, and an insert assembly with an adjustable arc length is sandwiched between the inner cylinder and the outer cylinder between adjacent rectangular windows, and the adjacent insert assemblies are similar to each other. The side ends form a limit window with adjustable width at the corresponding rectangular window, the limit window is engaged with the corresponding roller, and the maximum width of the limit window is smaller than the diameter of the roller; the upper bearing seat, the lower bearing seat, and The three support blocks are located in the cavity surrounded by the cylindrical retaining wall and the bottom wall of the connecting piece. There is an avoidance channel coaxial with the vertical movable rod and used to avoid the third rod section in the middle of the upper bearing seat and the lower bearing seat. hole, the third rod section can move up and down in the avoidance through hole, the three support blocks are located between the upper bearing seat and the lower bearing seat, and the three support blocks are respectively arranged between the three rollers, the upper bearing seat and the lower bearing seat There are three upper bearings and lower bearings respectively corresponding to the positions of the three support block bodies on the bearing seat. The support block body is clamped between a group of upper bearings and lower bearings corresponding to the positions. The support block body is supported by a horizontal support spring. It is fixedly connected with the inner wall of the inner cylinder, the horizontal support spring is located in the radial direction of the inner cylinder, the support block body is integrally formed with a tip that reaches the side wall of the third rod section, and the left and right ends of the support block body are respectively provided with dials One of the shifting blocks is inclined upward, and the other is inclined downward, and the shifting blocks located at the left and right ends of the support block body are respectively used to toggle the rollers on both sides of the support block, and the two shifting blocks at each roller The inclined directions are opposite and arranged crosswise to clamp the rollers; the end cover is detachably connected to the lower end of the cylindrical retaining wall for clamping the upper bearing seat, the support block and the lower bearing seat between the connecting piece and the end cover.

Rotating the vertical movable rod can make the vertical movable rod move up and down, and then the third rod section moves up and down. Smooth transition to the middle, the three support block bodies are clamped in the same horizontal direction through the upper bearing and the lower bearing, and because the tip of the support block body on the support block body reaches the side wall of the third bar section, when the third bar When the section moves up and down, the support block will gradually move away from the central axis of the third rod section or approach the central axis. The support block is fixedly connected with the inner cylinder through the horizontal support spring. Specifically, the corresponding position of the inner cylinder is integrally formed with a horizontal The support connected to the support spring, as the third rod section rotates, the support block will move back and forth along the axis of the horizontal support spring, and the shift blocks at both ends of the support block will also be displaced accordingly. When the contact position between the shift block and the roller changes , the pressure on the rollers will also change. Since the two shifting blocks at each roller are inclined in opposite directions and arranged crosswise, they can apply force to the rollers from two symmetrical angles. The rollers and their corresponding two The shifting blocks are all in line contact. When the supporting block is at the thickest position of the third bar section, the rollers are pushed to the outermost. At this time, the rolling depth of the rolling processing device is the largest. When the supporting block gradually moves to the At the thinner position of the third bar section, the roller gradually retracts under the action of the limit window. When the support block is at the thinnest position of the third bar section, the side wall of the roller is just in line with the cylindrical The outer wall of the retaining wall is flush, and the rolling depth is 0 at this moment. The three rollers are respectively located at the rectangular window on the cylindrical retaining wall. The height of the rectangular window is slightly higher than the height of the rollers, so the displacement of the rollers in the up and down direction can be limited. Adjust the width of the limit window according to the rolling depth requirements. Then the depth of the radial movement of the roller along the cylindrical retaining wall is limited, and the limit window will not be larger than the diameter of the roller when the limit window is opened to the maximum, so the roller will not fall off from the limit window. The rollers are always located between the rectangular windows within the radial movement range along the cylindrical retaining wall, and the rollers are always in line contact with the limit window and the stopper of the support block. The size of the limit window can be adjusted by adjusting the arc length of the insert piece assembly. By adjusting the axial movement of the vertical movable rod, the position of the support block can be changed. At the same time, the length of the roller protruding radially along the device can be adjusted in conjunction with the width of the limit window, so as to realize the adjustment of the rolling depth.

Preferably, the radian of the insert assembly is consistent with the arc of the cylindrical retaining wall between the two corresponding rectangular windows, and the insert assembly includes a left insert and a right insert, and parts of the left insert and the right insert The boards are stacked, and the overlapping parts are provided with meshing serrations, and the thickness of the left insert or the right insert gradually decreases along the arc of the board from one end at the overlapping position to the end protruding out of the rectangular window. The insert assembly can also be set to other conventional structures. The overall arc length of the insert assembly is controlled by adjusting the number of sawtooth meshes between the left insert and the right insert, and then the width of the limit window at the rectangular window is adjusted. With the movement of the vertical movable rod, the position of the support block can be adjusted to push the roller , the roller is clamped with the limit window to complete the adjustment of the rolling depth.

Preferably, the left insert or the right insert in the insert assembly is fixedly connected to the cylindrical retaining wall, the other insert is a movable insert, and the end of the movable insert protruding out of the rectangular window is arranged along the horizontal direction. The scale line used to adjust the width of the limit window. One of the insert components is fixed and the other is movable. This is for the convenience of adjustment. In addition, the scale line is set on the movable insert to facilitate the adjustment of the three limit windows to the same size. The degree of adjustment can be read intuitively through the scale line . For specific adjustments, remove the end cover, then take out the movable insert from between the inner cylinder and the outer cylinder, move it to a suitable position, then push the movable insert to the fixed insert, and put the end cover Just install it and fix it. The left insert and the right insert cannot move left and right because of the sawtooth engagement, and have a stable limit effect on the roller.

Preferably, a light hole coaxial with and in communication with the threaded through hole is opened on the tool handle, and an inner hexagonal structure groove adapted to a hexagonal wrench is provided on the top of the first rod segment. Insert the extended hexagonal wrench through the light hole at the tool handle, and the hexagonal wrench snaps into the groove of the inner hexagonal structure, so that the vertical movable rod can be rotated and adjusted, so that the support block can move radially along the vertical movable rod.

Preferably, the upper end of the cylindrical retaining wall surrounds the lower end of the connecting piece, and the two are fastened and connected by a plurality of bolts. Specifically, a plurality of bolts are evenly distributed along the circumference of the cylindrical retaining wall.

Preferably, the outer cylinder of the cylindrical retaining wall is provided with countersunk grooves for assembling bolts and facing the inner cylinder, and the heads of the bolts are located in the countersink grooves, and there is a gap between the bottom of the countersink grooves and the inner cylinder. An annular spacer is also provided. This setup makes sense.

Preferably, the upper bearing seat and the lower bearing seat are threadedly connected to the inner wall of the inner cylinder respectively. This is to ensure that the upper bearing seat and the lower bearing seat are firmly connected. Specifically, those skilled in the art can easily understand that the structures of the upper bearing seat and the lower bearing seat are provided with notch grooves for avoiding rollers and shifting blocks.

Compared with the prior art, the technical solution provided by the present invention has the following advantages: This application proposes a rolling processing device with variable rolling depth, which can realize different rolling depths by adjusting the roller extension height and changing the rolling depth The rolling processing of the hole surface required by the pressing depth meets the processing requirements of a tool for a series of holes with different diameters; while improving the rolling processing efficiency, it also broadens the scope of use of the rolling device.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings on the premise of not paying creative work.

Fig. 1 is the A-A cross-sectional view of a rolling processing device with variable rolling depth according to the present invention;

Fig. 2 is a transverse sectional view of a support block of a rolling processing device with variable rolling depth according to the present invention when the rolling depth is 0;

Fig. 3 is a transverse cross-sectional view of a support block of a rolling processing device with variable rolling depth according to the present invention when the rolling depth is maximum;

Fig. 4 is the top view of the support block of the present invention;

Fig. 5 is a longitudinal sectional view of the support block of the present invention (the B-B direction sectional view of Fig. 4);

Fig. 6 is an axonometric view of the cylindrical retaining wall of the present invention (hiding the inner cylinder);

FIG. 7 is an enlarged view of the structure at I in FIG. 6 .

Among the figure: 1, tool handle; 101, light hole; 2, vertical movable rod; 201, first rod section; 202, second rod section; 203, third rod section; 3, bolt; 301, countersunk groove ; 4, upper bearing seat; 5, upper bearing; 6, outer cylinder; 7, support block; 701, tip; 702, dial block; 8, inner cylinder; 9, horizontal support spring; 10, lower bearing; 11 , lower bearing seat; 12, end cover; 13, roller; 14, connector; 1401, threaded through hole; 15, left insert; 16, right insert; 17, ring gasket; 18, rectangular window; 19 , limit window; 20, avoidance through hole; 21, sawtooth, 22, scale line, 23, inner hexagonal structure groove.

Detailed ways

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the solutions of the present invention will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the description, it should be noted that the terms "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations.

In the following description, many specific details have been set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here; obviously, the embodiments in the description are only some embodiments of the present invention, and Not all examples.

Specific embodiments of the present invention will be described in detail below in conjunction with accompanying drawings 1 to 7 .

In one embodiment, as shown in FIG. 1 , a rolling processing device with variable rolling depth is disclosed, which includes a cutter body part and a connecting piece 14 fixedly connected to the end of the handle 1; the cutter body part includes a vertical Straight movable rod 2, upper bearing seat 4, lower bearing seat 11, three rollers 13, three support blocks 7, cylindrical retaining wall and end cover 12, threaded through hole 1401 is opened on the axis of connector 14, The vertical movable rod 2 is coaxial with the threaded through hole 1401 and includes the first rod segment 201, the second rod segment 202 and the third rod segment 203 from top to bottom, the first rod segment 201 is threadedly fitted with the threaded through hole 1401, the second rod segment The longitudinal section of the three-bar segment 203 is drum-shaped, and the upper end of the cylindrical retaining wall is detachably and fixedly connected to the lower end of the connector 14; 13 rectangular window 18, the height of the rectangular window 18 is adapted to the height of the roller 13, the width of the rectangular window 18 is greater than the width of the roller 13, and the cylindrical retaining wall includes an inner cylinder 8 and an outer cylinder coaxially arranged 6, and the inner cylinder 8 and the outer cylinder 6 between the adjacent rectangular windows 18 are sandwiched with an adjustable arc-length insert assembly, and the adjacent side ends of the adjacent insert assemblies are formed at the corresponding rectangular window 18 The limit window 19 with adjustable width, the limit window 19 is engaged with the corresponding roller 13, the maximum width of the limit window 19 is smaller than the diameter of the roller 13; the upper bearing seat 4, the lower bearing seat 11, and three The support block 7 is located in the cavity surrounded by the cylindrical retaining wall and the bottom wall of the connecting piece 14. There is a space between the upper bearing seat 4 and the lower bearing seat 11 which is coaxial with the vertical movable rod 2 and is used to avoid the third rod section. 203, the avoidance through hole 20, the third rod section 203 can move up and down in the avoidance through hole 20, the three support blocks 7 are located between the upper bearing seat 4 and the lower bearing seat 11, and the three support blocks 7 are respectively arranged in three Between the two rollers 13, three upper bearings 5 and lower bearings 10 respectively corresponding to the positions of the three support blocks 7 bodies are arranged on the upper bearing seat 4 and the lower bearing seat 11, and the support block 7 bodies are clamped in positions corresponding to the positions. Between a group of upper bearings 5 and lower bearings 10, the body of the support block 7 is fixedly connected to the inner wall of the inner cylinder 8 through the horizontal support spring 9, the horizontal support spring 9 is located in the radial direction of the inner cylinder 8, and the support block 7 is on the body The tip 701 is integrally formed on the side wall of the third rod section 203, and the left and right ends of the support block 7 body are respectively provided with shifting blocks 702, one of which is inclined upward, and the other is inclined downward, and The shifting blocks 702 located at the left and right ends of the body of the support block 7 are respectively used to toggle the rollers 13 on both sides of the support block 7 , and the two shifting blocks 702 at each roller 13 are inclined in opposite directions and arranged crosswise to clamp the rollers 13 ; The end cover 12 is detachably connected to the lower end of the cylindrical retaining wall for clamping the upper bearing seat 4 , the support block 7 and the lower bearing seat 11 between the connector 14 and the end cover 12 .

In the vertical movable rod 2, the first rod segment 201, the second rod segment 202 and the third rod segment 203 are integrally formed, the outer wall of the first rod segment 201 is provided with threads, the second rod segment 202 and the third rod segment 203 are The outer wall is smooth, and the second rod segment 202 connects the first rod segment 201 and the second rod segment 203 . Rotating the vertical movable rod 2 can make the vertical movable rod 2 move up and down, and then make the third rod section 203 move up and down, the third rod section 203 is drum-shaped, the diameter of its upper end and lower end is smaller, and the diameter in the middle is larger. And transition smoothly from both ends to the middle, the three support block 7 bodies are clamped in the same horizontal direction by the upper bearing and the lower bearing, and because the tip 701 on the support block 7 body reaches the third rod segment 203 side wall, so when the third rod section 203 moves up and down, the support block 7 will gradually move away from the central axis of the third rod section 203 or approach the central axis, and the support block 7 is fixedly connected with the inner cylinder 8 through the horizontal support spring 9, specifically Yes, the corresponding position of the inner cylinder 8 is integrally formed with a support connected to the horizontal support spring 9, and as the third rod section 203 rotates, the support block 7 will move back and forth along the axis direction of the horizontal support spring 9, and the support block 7. The shifting blocks 702 at both ends are also displaced accordingly. When the contact position between the shifting block 702 and the roller 13 changes, the pressure on the roller 13 will also change. Because the two shifting blocks 702 at each roller 13 are inclined in the direction On the contrary and arranged crosswise, it can apply force to the roller 13 from two symmetrical angles. The roller 13 and the two corresponding shifting blocks 702 are in line contact. When the support block 7 is located at the thickest position of the third rod section 203 , the roller 13 is pushed to the outermost position, and the rolling depth of the rolling processing device is the largest at this time. Under the action of the bit window 19, it retracts gradually. When the support block 7 is located at the thinnest position of the third rod section 203, the side wall of the roller 13 is just flush with the outer wall of the cylindrical retaining wall. The depth is 0. The three rollers 13 are respectively located at the rectangular windows 18 on the cylindrical retaining wall. The height of the rectangular windows 18 is slightly higher than that of the rollers 13, so the displacement of the rollers 13 in the up and down direction can be limited, and the limit can be adjusted according to the requirements of the rolling depth. The width of the position window 19 limits the depth of the radial movement of the roller 13 along the cylindrical retaining wall. The limit window 19 is opened to the maximum and will not be greater than the diameter of the roller 13, so the roller 13 will not move from the position limit to the maximum. Window 19 falls off. The roller 13 is always located between the rectangular windows 18 within the radial movement range of the cylindrical retaining wall, and the roller 13 is in line contact with the limiting window 19 and the shifting block 702 of the support block 7 . The size of the limiting window 19 can be adjusted by adjusting the arc length of the insert assembly. By adjusting the axial movement of the vertical movable rod 2, the position of the support block 7 is changed, and at the same time, the width of the limit window 19 can be adjusted to adjust the length of the roller 13 protruding radially along the device to realize the adjustment of the rolling depth.

During specific use, the corresponding relationship between the protruding depth of the roller 13 from the limit window 19 and the opening width of the limit window 19 has been obtained through multiple sets of tests. When in use, first manually adjust the size of the limit window 19 according to the rolling depth to be processed, then rotate the third rod section 203 to push the support block 7 to push the roller 13 out until it just fits with the limit window 19, and stop the rotation For the third rod section 203, the position adjustment of the roller 13 is completed, and the rolling process can be started. When the rolling depth needs to be changed, the third rod section 203 is first manually rotated, the roller 13 and the limit window 19 are loosened by changing the position of the support block 7, and after the size of the limit window 19 is adjusted in place, the The rod segment 203 further pushes the roller 13 until it just fits with the limit window 19, and then the rolling process can start.

On the basis of the above embodiments, in a preferred embodiment, the radian of the insert assembly is consistent with the arc of the cylindrical retaining wall between the two corresponding rectangular windows 18, and the insert assembly includes a left insert with the same structure 15 and the right insert 16, part of the plate body of the left insert 15 and the right insert 16 overlaps, and the overlapped part is provided with the sawtooth 21 that engages, and the left insert 15 or the right insert 16 from the overlapping position The thickness of the plate body gradually decreases along the arc of the plate body from one end of the plate body to the end protruding out of the rectangular window 18 . The insert assembly can also be set to other conventional structures. The overall arc length of the insert assembly is controlled by adjusting the meshing number of the sawtooth 21 of the left insert 15 and the right insert 16, and then the width of the limit window 19 at the rectangular window 18 is adjusted, and the support block is adjusted in conjunction with the movement of the vertical movable rod 2 The position of 7 can push the roller 13, and the roller 13 is clamped with the limit window 19 to complete the adjustment of the rolling depth.

On the basis of the above embodiments, in a preferred embodiment, the left insert 15 or the right insert 16 in the insert assembly is fixedly connected to the cylindrical retaining wall, and the other insert is a movable insert, and can The end of the movable insert sticking out of the rectangular window 18 is provided with a scale line 22 along the horizontal direction for adjusting the width of the limit window 19 . One of the insert components is fixed and the other is movable, which is for the convenience of adjustment. In addition, the scale line 22 is set on the movable insert to facilitate the adjustment of the three limit windows 19 to the same size, which can be read intuitively through the scale line 22 degree of adjustment. During specific adjustment, the end cover 12 is removed, and then the movable insert is taken out from between the inner cylinder 8 and the outer cylinder 6, moved to a suitable position, and then the movable insert is pushed onto the fixed insert, The end cover 12 is installed and fixed. The left inserting piece 15 and the right inserting piece 16 can not be displaced left and right because the sawtooth 21 is engaged, and the roller 13 has a stable position-limiting effect.

On the basis of the above embodiments, in a preferred embodiment, the handle 1 is provided with a light hole 101 that is coaxial and communicated with the threaded through hole 1401, and the top of the first rod section 201 is provided with a hexagonal wrench. The inner hexagonal structure groove 23. Insert the extended hexagonal wrench from the light hole 101 at the tool handle 1, and the hexagonal wrench snaps into the groove 23 of the inner hexagonal structure, so that the vertical movable rod 2 can be rotated and adjusted, so that the support block 7 can move along the direction of the vertical movable rod 2. radial movement.

On the basis of the above embodiments, in a preferred embodiment, the upper end of the cylindrical retaining wall surrounds the lower end of the connecting member 14 and the two are fastened together by a plurality of bolts 3 . Specifically, a plurality of bolts 3 are evenly distributed along the circumference of the cylindrical retaining wall.

On the basis of the above embodiments, in a preferred embodiment, the outer cylinder 6 of the cylindrical retaining wall is provided with a countersunk groove 301 for assembling the bolt 3 and facing the inner cylinder 8, and the head of the bolt 3 The part is located in the countersunk groove 301 , and an annular gasket 17 is also arranged between the bottom of the countersunk groove 301 and the inner cylinder 8 . This setup makes sense.

On the basis of the above embodiments, in a preferred embodiment, the upper bearing seat 4 and the lower bearing seat 11 are screwed to the inner wall of the inner cylindrical body 8 respectively. This is to ensure that the upper bearing seat 4 and the lower bearing seat 11 are firmly connected. Specifically, those skilled in the art can easily understand that the structure of the upper bearing seat 4 and the lower bearing seat 11 is provided with rollers 13 and shifting blocks 702 for avoiding notch slot.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Although detailed descriptions have been made with reference to the foregoing embodiments, those of ordinary skill in the art should understand that the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and These modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of each embodiment, and all of them should be covered by the protection scope of the claims.

Claims (7)

1. A variable rolling depth rolling device, characterized by comprising a cutter body part and a connecting piece (14) fixedly connected to the end of a cutter handle (1); the cutter body part comprises a vertical movable rod (2), an upper bearing seat (4), a lower bearing seat (11), three rollers (13), three supporting blocks (7), a cylindrical retaining wall and an end cover (12), wherein a threaded through hole (1401) is formed in the axis of a connecting piece (14), the vertical movable rod (2) is coaxial with the threaded through hole (1401) and comprises a first rod section (201), a second rod section (202) and a third rod section (203) from top to bottom, the first rod section (201) is in threaded fit with the threaded through hole (1401), the longitudinal section of the third rod section (203) is drum-shaped, and the upper end part of the cylindrical retaining wall is detachably and fixedly connected to the lower end part of the connecting piece (14); the cylindrical retaining wall is uniformly provided with three rectangular windows (18) for accommodating the rollers (13) along the circumferential direction, the heights of the rectangular windows (18) are matched with the heights of the rollers (13), the width of the rectangular windows (18) is larger than that of the rollers (13), the cylindrical retaining wall comprises an inner cylinder body (8) and an outer cylinder body (6) which are coaxially arranged, the inner cylinder body (8) and the outer cylinder body (6) between the adjacent rectangular windows (18) are clamped with inserting sheet assemblies with adjustable arc lengths, the adjacent side ends of the adjacent inserting sheet assemblies form limit windows (19) with adjustable widths at the corresponding rectangular windows (18), the limit windows (19) are clamped with the corresponding rollers (13), and the maximum width of the limit windows (19) is smaller than the diameter of the rollers (13); the upper bearing seat (4), the lower bearing seat (11) and three supporting blocks (7) are arranged in a cavity surrounded by a cylinder type baffle wall and a bottom wall of a connecting piece (14), an avoidance through hole (20) coaxial with a vertical movable rod (2) and used for avoiding a third rod section (203) is arranged between the upper bearing seat (4) and the lower bearing seat (11), the third rod section (203) can move up and down in the avoidance through hole (20), the three supporting blocks (7) are arranged between the upper bearing seat (4) and the lower bearing seat (11) respectively, three upper bearings (5) and lower bearings (10) which correspond to the positions of three supporting blocks (7) are arranged on the upper bearing seat (4) and the lower bearing seat (11) respectively, the supporting blocks (7) are clamped between a group of upper bearings (5) and lower bearings (10) which correspond to the positions of the upper bearings, the supporting blocks (7) are fixedly connected with the inner wall of an inner cylinder body (8) through horizontal supporting springs (9), the horizontal supporting springs (9) are positioned in the upper supporting blocks (7) and the upper ends of the upper supporting blocks (7) are arranged at the upper ends of the upper supporting blocks (701) which are formed in a radial direction, the upper supporting blocks (7) are arranged at the two ends of the upper supporting blocks (701) respectively, the other shifting block is inclined downwards, the shifting blocks positioned at the left end and the right end of the supporting block (7) body are respectively used for shifting the rollers (13) at the two sides of the supporting block (7), and the two shifting blocks at each roller (13) are inclined in opposite directions and are arranged in a crossing manner so as to clamp the rollers (13); the end cover (12) is detachably connected to the lower end part of the cylindrical retaining wall and is used for clamping the upper bearing seat (4), the supporting block (7) and the lower bearing seat (11) between the connecting piece (14) and the end cover (12).

2. A variable depth roll finishing device as claimed in claim 1, characterized in that the curvature of the insert assembly corresponds to the curvature of the cylindrical wall between the two rectangular windows (18) corresponding thereto, the insert assembly comprises a left insert (15) and a right insert (16) of identical construction, part of the plates of the left insert (15) and the right insert (16) are mutually overlapped, and the overlapped part is provided with engaged saw teeth (21), and the thickness of the plate body of the left insert (15) or the right insert (16) gradually decreases along the curvature of the plate body from one end of the overlapped part to one end of the rectangular window (18).

3. A variable depth rolling mill according to claim 2, characterized in that the left insert (15) or the right insert (16) of the insert assembly is fixedly connected to the cylindrical wall, the other insert is a movable insert, and the end of the movable insert protruding out of the rectangular window (18) is provided with graduation marks (22) for adjusting the width of the limiting window (19) in the horizontal direction.

4. A variable rolling depth rolling device according to any one of claims 1-3, characterized in that the shank (1) is provided with a smooth bore (101) coaxial and communicating with the threaded through bore (1401), and the top of the first shank segment (201) is provided with a socket head cap recess (23) adapted to a hexagonal wrench.

5. A variable-depth rolling device according to claim 4, characterized in that the upper end of the cylindrical retaining wall is enclosed to the lower end of the connecting piece (14) and the two are fastened by means of a plurality of bolts (3).

6. The rolling device with variable rolling depth according to claim 5, characterized in that a countersunk head groove (301) for assembling the bolt (3) and facing the inner cylinder (8) is arranged on the outer cylinder (6) of the cylinder type retaining wall, the head part of the bolt (3) is positioned in the countersunk head groove (301), and an annular gasket (17) is further arranged between the bottom of the countersunk head groove (301) and the inner cylinder (8).

7. The rolling device with variable rolling depth according to claim 6, wherein the upper bearing seat (4) and the lower bearing seat (11) are respectively in threaded connection with the inner wall of the inner cylinder body (8).