CN114981022A

CN114981022A - Retrofit tool, retrofit device and method for retrofitting workpieces

Info

Publication number: CN114981022A
Application number: CN202080085462.1A
Authority: CN
Inventors: R·施耐德; M·舒特; P·拉班; M·维克尔特
Original assignee: Wf Mechanical Sheet Forming Technology & CoKg GmbH; SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG
Current assignee: Wf Mechanical Sheet Forming Technology & CoKg GmbH; SGF Sueddeutsche Gelenkscheibenfabrik GmbH and Co KG
Priority date: 2019-12-10
Filing date: 2020-12-07
Publication date: 2022-08-30
Also published as: WO2021116027A1; DE102019008555A1

Abstract

The invention relates to a retrofit tool (10) for retrofitting a workpiece, comprising: at least one body (12) having a longitudinal axis (12 a); and at least one reforming roller (14) which has at least one rotation axis (14, 16, 18) and is rotatably supported on the at least one main body (12), wherein the at least one reforming roller (14, 16, 18) has at least one reforming section (28, 30, 32), wherein the at least one reforming section (28, 30, 32) protrudes beyond at least one radially outer surface (40) of the at least one main body (12) at least in a radial direction with respect to a longitudinal axis (A) of the at least one main body, so as to form at least one reforming region (48, 50, 52) for reforming a workpiece. The invention further relates to a method for modifying a workpiece, wherein for modifying the workpiece at least one forming tool and a modifying tool (10) according to any one of claims 1 to 19 are provided, wherein the at least one forming tool has a negative of at least a part of a structure to be structured on the workpiece, wherein the at least one modifying tool (10) and the at least one forming tool interact to modify the at least one workpiece such that material of the workpiece is pressed into the negative of the forming tool in order to structure the structure on the workpiece.

Description

Retrofit tool, retrofit device and method for retrofitting workpieces

Technical Field

The invention relates to a retrofit tool for retrofitting workpieces and to a retrofitting device having such a retrofit tool. The invention also relates to a method for retrofitting a workpiece.

Disclosure of Invention

The invention aims to provide a modification tool and a modification device for modifying a workpiece, which can be used for modifying the workpiece quickly, with low cost and high precision.

Further embodiments of the invention are referred to in the dependent claims.

The retrofit tool according to the invention for retrofitting workpieces comprises at least one main body having a longitudinal axis and at least one retrofit roller having at least one rotational axis and being rotatably supported on the at least one main body. The at least one profiling roller has at least one profiling segment, wherein the at least one profiling segment projects beyond at least one radially outer surface of the at least one body at least in a radial direction with respect to a longitudinal axis of the at least one body, in order to form at least one profiling zone for profiling a workpiece.

The workpiece material can be pressed by at least one shaping segment of at least one shaping roller, so that the workpiece can be shaped. The modification tool can act with at least one modification section on the inner circumferential surface of, for example, a tubular or annular workpiece to modify the workpiece material. At least one of the modified rollers is rotatably mounted, so that at least the modified section of the at least one modified roller can roll on the inner circumferential surface of the workpiece. The modification tool can yield the workpiece material and press it into a negative mold, for example, so that complex structures can be created on the workpiece with high precision by the modification. The workpiece can be quickly and inexpensively retrofitted.

The longitudinal axis of the body may form the axis of rotation of the retrofit tool. The body may have at least one opening through which at least one reforming section of at least one reforming roller extends in a radial direction. The modified section of the at least one modified roll may protrude in a radial direction through the at least one opening in the body beyond the radially outer surface of the body in the radial direction.

The at least one modified roll may have at least one bearing segment. The at least one bearing segment may be at least partially received in the at least one body. At least one bearing segment may be of cylindrical configuration. At least one bearing segment may be of cylindrical configuration. At least one bearing segment may be fixedly connected to the modified segment. At least one bearing segment may accordingly be of tubular or rod-like construction. The at least one bearing segment may be adjoined to the at least one modified segment in the axial direction. At least one of the reforming rollers may be of mushroom-like configuration.

The reforming tool may have at least one bearing assembly for supporting the at least one reforming roller on the at least one body. The at least one bearing assembly may be configured such that the at least one bearing assembly may withstand forces in a radial direction and/or an axial direction. At least one bearing assembly may be received in at least one recess in the at least one body.

The at least one bearing assembly may have at least one bearing. At least one bearing may rotatably support at least one bearing segment of the at least one reform roller on the at least one body. At least one of the bearings may be a rolling bearing. The at least one bearing may be a ball bearing or a roller bearing. For example, the at least one bearing may be a tapered roller bearing. At least one of the bearings may have a bearing inner race and a bearing outer race between which the rolling bodies are accommodated. The bearing outer ring may be supported on the at least one body in an axial direction and/or a radial direction. The bearing inner ring can partially accommodate the bearing segments of the at least one modified roll. At least one bearing assembly may have a plurality of bearings. The at least one bearing assembly may consist of 1, 2, 3 or more bearings. The bearings may be arranged offset from each other in the axial direction on the bearing segments. The bearings may thus have a predetermined axial distance from each other. The bearing type of at least one of the bearing assemblies may vary. For example, at least one bearing assembly may have ball bearings and roller bearings. It is also envisaged that the tapered roller bearing and the conventional roller bearing form at least one bearing assembly.

The at least one retrofit roller may be retained on the at least one bearing assembly via at least one axial locking element. The at least one locking element may be supported on a bearing inner race of the at least one bearing. The at least one locking element may be connected to an axial end of the at least one bearing segment. The at least one locking element may be a locking nut or a locking ring. Furthermore, a plurality of locking elements may be provided at the ends of the bearing segments.

The at least one axis of rotation of the at least one reforming roller may extend at least substantially parallel to the longitudinal axis of the body. The at least one axis of rotation may extend obliquely to the longitudinal axis of the body. The at least one axis of rotation may be a predetermined radial distance from the longitudinal axis of the body. At least one modified section of at least one modified roll is displaceable at least along the axis of rotation of the modified roll.

The at least one modified roll may be of multipart construction. For example, the modified section and the bearing section may be formed by separate but interconnected elements. The at least one bearing segment may have at least one spring. At least the bearing segment may have at least one inner part and at least one outer part. The at least one outer member of the at least one bearing segment may be connected to the at least one bearing assembly. The at least one inner part and the at least one outer part are displaceable relative to each other. The at least one outer part may at least partially accommodate the at least one inner part. The at least one outer part may thereby form a guide for the at least one inner part. The at least one outer member may be of tubular construction. The at least one inner part and the at least one outer part may be coupled to each other via at least one spring. The at least one inner member and the at least one outer member may be displaced relative to each other in response to compression or extension of the at least one spring. The at least one modified section is displaceable together with the at least one inner part relative to the outer part. The at least one spring may be a compression spring or an extension spring.

At least one of the reforming rollers may be supported on the main body so as not to be displaceable at least in a radial direction. At least one of the modified rollers is at least partially displaceable along its axis of rotation. The radial position and/or the axial position of at least the reforming section of at least one reforming roller may be adjusted mechanically, pneumatically or hydraulically. The position of the at least one reforming roll can accordingly also be adjusted on the machine side by mechanical, pneumatic or hydraulic adjustment.

The at least one modified roll may have at least two bearing segments. At least one modified section may be provided in the axial direction between at least two bearing sections. The at least one main body may be configured such that the at least two bearing segments are at least partially accommodated in the main body. The at least one bearing assembly may have a plurality of bearings such that each of the at least two bearing segments is supported on the main body via the at least one bearing. In other words, the at least one body may extend in the axial direction on both sides of the at least one profiling segment of the at least one profiling roller.

At least one of the reforming sections may have at least one machining site in the region of its largest outer diameter, which is designed for reforming a workpiece. The at least one modified section may be curved or arcuate in the region of its maximum outer diameter. At least one modification section can act on the inner circumferential surface of the workpiece by using at least one processing station to modify the workpiece material. The machining station may have at least one machining edge or at least one machining top, which represents the largest outer diameter of the modification section, which may act on the inner circumferential surface of the workpiece to modify the workpiece material. The at least one modified section may be at least partially of conical or frusto-conical configuration.

The retrofit tool may have a plurality of retrofit rollers. These modified rollers may be arranged on the main body offset from each other by a predetermined angular distance with respect to the longitudinal axis of the main body. The protruding modified sections of these modified rollers may protrude beyond the main body in the radial direction offset from each other by a predetermined angular distance with respect to the longitudinal axis of the main body. These modification rollers can act with their modification zones on the blank at a plurality of points in order to modify the blank material. The modified zone can act in particular on the inner circumferential surface of the tubular blank. During the retrofitting process using the retrofitting tool, the wall thickness of the tubular blank is reduced. Due to the rotation of the blank or the shaping tool, the shaping rollers can successively machine partial regions of the blank or partial regions of the inner circumferential surface of the blank. With a plurality of reforming rollers, the reforming tool can act on the blank at a plurality of places, so that the duration of the reforming process can be shortened. The blank material can also be given a faster and more uniform yield by means of a plurality of modified rolls and pressed into the negative mould of the forming tool. In addition, with a plurality of reforming rolls, the reforming tool can be better supported during the reforming process.

The axis of rotation of the reforming roller may be arranged on a radius about the longitudinal axis of the body. When the modifying tool is rotated, the modifying roller may move in a radius around the longitudinal axis of the body, in which case the longitudinal axis of the body forms the axis of rotation of the body.

At least one body may be of multipart construction. The main body may have a plurality of recesses in which the bearings of at least one bearing assembly may be received. The various parts of the body may be bolted to each other. The various parts of the body may be of substantially disc-like configuration.

The invention further relates to a retrofitting device for retrofitting a workpiece, comprising at least one retrofitting tool and at least one shaping tool. At least one forming tool has a negative mold of at least a portion of a structure to be built on a workpiece. The at least one shaping tool and the at least one shaping tool can be displaced relative to each other in the axial direction, wherein the at least one shaping tool and/or the at least one shaping tool can be rotated.

The at least one forming tool and the at least one modifying tool may be arranged coaxially. In this case, the axis of rotation of the at least one reforming roller may have a radial distance from the longitudinal axis of the body and the axis of the forming tool. The female die may be configured on the inner circumferential surface of the forming tool. At least one of the forming tools may be of barrel or drum configuration. At least one tool may be clamped into the forming tool.

The forming tool and/or the modifying tool may be driven in rotation. At least one of the modified rollers may be driven to rotate. At least one of the reforming rollers is freely rotatably supported on at least one of the bodies. This is the case, for example, when the retrofit tool is driven.

The invention further relates to a method for modifying a workpiece, wherein at least one forming tool and at least one modifying tool are provided for modifying the workpiece, wherein the at least one forming tool has a negative mold of at least a part of a structure to be structured on the workpiece, wherein the at least one modifying tool and the at least one forming tool interact for modifying the at least one workpiece in such a way that material of the workpiece is pressed into the negative mold of the forming tool for structuring the structure on the workpiece.

In the method according to the invention, the modifying tool presses the workpiece material into a negative mold of the forming tool, wherein the negative mold corresponds to a negative mold of at least one part of the structure to be formed on the workpiece. The at least one forming tool and the at least one modifying tool interact such that the workpiece material can yield into a negative mold of the forming tool. Steel, stainless steel and metals, such as aluminum, for example, can be retrofitted with the method according to the invention.

The modifying tool may act on at least the inner circumferential surface of the workpiece to modify the workpiece material. By performing the modification process using the modification tool, the wall thickness of the tubular blank is reduced, since the blank material is pressed into the negative of the forming tool during the modification. The modification tool is moved into the workpiece for modification. The workpiece and/or the forming tool with the negative mold may be stationary during the modification. At least one of the forming tools may be rotated during the retrofitting. Furthermore, at least one of the modification tools may be rotated during modification. The forming tool and the modifying tool may be rotated in opposite rotational directions. However, the shaping tool and the shaping tool can also be rotated together during the shaping or in the same direction of rotation. The modifying tool and/or the shaping tool may also reverse the direction of rotation during machining. The workpiece may be arranged on at least one forming tool during the retrofitting. The shaping tool can be moved in the axial direction relative to the shaping tool and the workpiece. In other words, the retrofit tool can be rotated and simultaneously moved in the axial direction relative to the workpiece and the forming tool.

At least one modifying tool is movable in an axial direction relative to the forming tool to modify the workpiece material. Alternatively or additionally, the at least one shaping tool may be displaceable in the axial direction relative to the at least one modifying tool to modify the workpiece material.

After the impact of the shaping tool on the workpiece, the at least one shaping roller can roll with its shaping segment on the workpiece. The at least one reforming roller can thereby be rotated about its axis of rotation. This ensures that each point on the inner circumferential surface of the workpiece is in contact with the modified section.

The at least one shaping tool and/or the at least one shaping tool can be controlled in such a way that a desired structure is formed locally or continuously on the outer circumferential surface of the workpiece. A controller may be provided for this purpose. The movement of the forming tool and the modifying tool may be synchronised. For example, the rotation of the forming tool and the rotation of the modifying tool may be synchronized by a controller or a transmission. Furthermore, the displacement of the shaping tool in the axial direction relative to the shaping tool can be controlled by the controller rotating the shaping tool.

Drawings

Exemplary embodiments of the retrofit tool are described below in conjunction with the appended drawings. In the figure:

fig. 1 shows a perspective view of a retrofit tool according to a first embodiment;

FIG. 2 shows a top view of a retrofit tool according to a first embodiment;

FIG. 3 shows a cross-sectional view along section line III-III in FIG. 2;

FIG. 4 shows a perspective view of a retrofit tool according to a second embodiment;

FIG. 5 shows a top view of a retrofit tool according to a second embodiment;

FIG. 6 shows a cross-sectional view taken along section line VI-VI in FIG. 5; and

fig. 7 shows a cross-sectional view of a retrofit tool according to a third embodiment.

Detailed Description

Fig. 1 shows a perspective view of a retrofit tool 10 according to a first embodiment. The modification tool 10 has a body 12 and modification rolls 14, 16, 18. The reforming

rollers

14, 16, 18 are held on the main body 12 in the axial direction via a fastening plate 20. The fastening plate 20 is screwed to the body 12 via screws 22. According to this embodiment, the body 12 is made up of two

parts

24 and 26.

The modified

rollers

14, 16, 18 are rotatably supported on the body 12. The reforming rolls 14, 16, 18 each have a reforming

section

28, 30, 32. The modified

sections

28, 30, 32 are at least partially of conical configuration. The modified

sections

28, 30, 32 have machined

surfaces

34, 36, 38 formed by the outer or side surfaces of the modified

sections

28, 30, 32. The working surfaces 34, 36, 38 are configured to contact the workpiece to be modified point by point, linearly or locally to modify the workpiece (not shown).

Fig. 2 shows a top view of the retrofit tool 10. The body 12 has an outer surface 40. According to the present embodiment, the main body 12

In a cylindrical, in particular cylindrical, configuration. The body 12 has a longitudinal axis a. The longitudinal axis a may also coincide with the axis of rotation of the body 12. Axis of rotation D of the reforming rolls 14, 16, 18 ₁₄ 、D ₁₆ 、D ₁₈ Is disposed on a radius R1 about longitudinal axis a. Radius R1 also represents the axis of rotation D of the modified

roll

14, 16, 18, respectively ₁₄ 、D ₁₆ 、D ₁₈ A distance from the longitudinal axis a of the body 12.

The reforming rolls 14, 16, 18 are configured to be arranged on the body 12 such that the reforming

sections

28, 30, 32 each define a reforming

region

42, 44, 46, wherein the working

surfaces

34, 36, 38 may be point-wise, linearly or locally brought into contact with a workpiece to be reformed (not shown)Out) of contact. The modified

sections

28, 30, 32 of the modified rolls 14, 16, 18 project with their modified

regions

42, 44, 46 in the radial direction beyond the outer surface 40 of the body 12. In the

modification zones

42, 44, 46, the

modification rollers

14, 16, 18 may be in contact with the inner circumferential surface of a workpiece (not shown) to be modified. During the modification, the machining surfaces 34, 36, 38 in the

modification zones

42, 44, 46 can be brought into contact with the workpiece to be modified at the machining-

site modification zones

48, 50, 52. At the

machining stations

48, 50, 52, the modified

sections

28, 30, 32 may have a maximum radial distance RA from the longitudinal axis a of the body 12 ₁ 、RA ₂ 、RA ₃ . The

processing stations

48, 50, 52 may be located on a common radius R2 about the longitudinal axis a of the body 12. Accordingly, the radius R2 is greater than the radius of the outer peripheral surface 40 of the body 12. Due to the at least partially conical configuration of the shaping

segments

28, 30, 32 of the shaping

rollers

14, 16, 18, the shaping

segments

28, 30, 32 have their maximum radius and outer diameter AD at the

machining locations

48, 50, 52 ₁₄ 、AD ₁₆ 、AD ₁₈ . The

machining stations

48, 50, 52 can have at least one machining edge or at least one machining top, which is denoted as the maximum outer diameter AD of the modified

sections

28, 30, 32 ₁₄ 、AD ₁₆ 、AD ₁₈ And may act on the inner peripheral surface of the workpiece to modify the workpiece material.

Fig. 3 shows a sectional view along the section line III-III in fig. 2. According to the present embodiment, the reforming rolls 14, 16, 18 are integrally reformed, as is shown in full in fig. 3 for the reforming roll 18. The modified roll 18 is shown in its entirety in fig. 3. The modified roll 18 has a bearing segment 54 in addition to the modified segment 32. The bearing segment 54 is partially received in the body 12. The reforming roller 18 is rotatably supported on the main body 12 with its bearing segments 54 via bearing assemblies 56.

Recesses

58, 60 are formed in the part 26 of the body 12, in which recesses 58, 60 the bearing assembly 56 is accommodated. According to the present embodiment, the bearing assembly 56 is comprised of two

bearings

62, 64. The

bearings

62, 64 may be rolling bearings, such as ball bearings or roller bearings. According to the illustrated embodiment, the

bearings

62, 64 are tapered roller bearings.

A recess 66 is formed in the part 24 of the body 12, into which recess 66 the bearing section 54 of the reforming roller 18 extends. A locking element 68 is provided on the bearing segment 54 in the recess 66. The locking member 68 secures the reform roller 18 in the axial direction to the bearing assembly 56. The locking element 68 may be, for example, a locking ring or a locking nut. The locking element 68 is supported in the axial direction on the bearing 62. For this purpose, the locking element 68 can be supported on a bearing inner ring 70 of the bearing 62. The bearing segments 54 are partially received in the bearing cone 70. The bearing 62 has, in addition to the bearing inner ring 70, a bearing outer ring 72 which is axially and radially supported on the main body 12 or on the inner wall of the recess 58. Rolling bodies 74 are provided between the bearing inner race 70 and the bearing outer race 72.

The bearing 64 is provided in the recess 60 and is therefore closer to the modified portion 32. The

bearings

62 and 64 are at an axial distance from each other. Just like bearing 62, bearing 64 also has an inner bearing race 76 and an outer bearing race 78. Rolling bodies 80 are provided between the bearing inner race 76 and the bearing outer race 78. Bearing cup 78 is supported on the inner wall of recess 60. The bearing cone 76 receives a section of the bearing segment 54. The bearing cone 76 extends through an opening 82 in the securing plate 20. The bearing inner race 76 may abut the modified section 32 with one of its end faces.

The machining face 38 of the reforming section 32 has a surface section 84 of conical configuration. In the case of the conically designed surface section 84, the modified section 32 widens conically in the direction of the body 12. At the conical surface section 84 and substantially perpendicular to the axis of rotation D ₁₈ Between the extended surfaces 86, the machining face 38 has a curved or arcuate surface section 88, wherein the modified section has its maximum outer diameter AD ₁₈ Or the maximum radius. Surface section 88 is about axis of rotation D ₁₈ Is convexly curved. The surface section 88 has a machining point 52 formed therein. After the region of maximum outer diameter or after the machining station 52, the outer diameter of the modified section 32 decreases in the direction of the surface 86. The reform roller 18 transitions into the bearing section 54 at surface 86. The bearing segments 54 are of cylindrical configuration.

An opening 92 extends between the recess 66 in the part 24 of the body 12 and the end face 90 of the body 12. The opening 92 may, for example, serve as a vent.

The above description of the reform roller 18 and its support applies similarly to the

reform rollers

14, 16 and their support.

Fig. 4 shows a perspective view of a retrofit tool 10 according to a second embodiment. The modification tool 10 has a body 12 and modification rolls 14, 16, 18. The modified

rollers

14, 16, 18 are fixed to the main body 12 in the axial direction via fastening plates 20 and screws 22. The body 12 is made up of two

parts

24 and 26. The member 24 is provided with a shaft segment 94 which can couple the body 12 to a drive device (not shown).

Screws

96, 98, 100 can be seen at modified

sections

28, 30, 32. According to the present embodiment, the reforming rolls 14, 16, 18 are multi-part. According to the present embodiment, the reforming

rollers

14, 16, 18 are disposed obliquely, i.e., inwardly tilted with respect to the longitudinal axis a.

Fig. 5 shows a top view of the retrofit tool 10. Structure of a modified tool 10 according to a second embodiment

Substantially corresponding to the structure of the embodiment described with reference to figures 1 to 3. The modified

rollers

14, 16, 18 are arranged obliquely.

Screws

96, 98, 100 are provided at the modified

sections

28, 30, 32. Axis of rotation D of the reforming rolls 14, 16, 18 ₁₄ 、D ₁₆ 、D ₁₈ Extending through the

screws

96, 98, 100. Axis of rotation D of the reforming rolls 14, 16, 18 ₁₄ 、D ₁₆ 、D ₁₈ Located on a radius R1 about the longitudinal axis a of the body 12.

The modified

sections

28, 30, 32 project beyond the outer peripheral surface 40 of the body 12 in the radial direction. The modified

sections

28, 30, 32 each define a modified

zone

42, 44, 46, in which the machining surfaces 34, 36, 38 may contact the workpiece (not shown) to be modified point-by-point, linearly or locally. The modified

sections

28, 30, 32 of the modified rolls 14, 16, 18 project with their modified

regions

42, 44, 46 in the radial direction beyond the outer surface 40 of the body 12. During the modification, the machining surfaces 34, 36, 38 in the

modification zones

42, 44, 46 can come into contact with the workpiece to be modified at the

machining locations

48, 50, 52. At the

machining locations

48, 50, 52, the machining faces 34, 36, 38 may have their maximum radial distance RA from the longitudinal axis A of the body 12 ₁ 、RA ₂ 、RA ₃ . The

contact sites

48, 50, 52 may lie on a common radius R2 about the longitudinal axis a of the body 12. Accordingly, the radius R2 is greater than the radius of the outer peripheral surface 40 of the body 12. The

machining stations

sections

Fig. 6 shows a cross-sectional view along the section line VI-VI in fig. 5. According to the present embodiment, the modified roller 18 is composed of a plurality of components. The reforming roller 18 has a reforming section 32 and

bearing segments 54. According to the present embodiment, the modified section 32 is formed by a machining element 32, which machining element 32 is screwed to the bearing section 54 via a screw 100. The bearing segments 54 are formed by an inner member 102 and an outer member 104. The outer part 104 has a conically configured end 106 which is at least partially received in a complementary recess 108 of the milling element 32. The inner part 102 is screwed to the machining element 32 via the screw 100.

The inner part 102 and the outer part 104 are coupled to each other via a spring 110. The spring 110 surrounds the end 112 of the inner member 102. The spring 110 is received in an end 114 of the outer member 104 and is supported on a shoulder 116 of the outer member 104. A nut 118 and washer 120 are attached to the end 112 of the inner member 102 to retain the spring 110 on the inner member 102. A substantially tubular outer member 104 houses the inner member 102. The outer piece 104 forms a guide for the inner piece 102. When the spring 110 is compressed, the inner member 102 may be along the rotational axis D ₁₈ Displaced relative to the outer member 104. The tooling elements 32 may be lifted from the end 106 of the outer piece 104 as the inner piece 102 is moved relative to the outer piece 104.

The outer part 104 is connected to the

bearings

62, 64 of the bearing assembly 56. The

bearings

62, 64 are received in the

recesses

58, 60 of the body 12. The outer part 104 is received in the bearing

cones

70, 76 of the

bearings

62, 64. Bearing cups 72, 78 are supported on body 12. For this purpose, a corresponding shoulder 122 is formed in the axial direction on the part 26 of the body 12 between the

bearings

62, 64 or between the

recesses

58, 60. The bearing outer race 78 of the bearing 64 is also supported on the retention plate 20. The bearing cone 76 extends through an opening 82 of the securing plate 20. The bearing segment 54 or the outer part 104 of the bearing segment 54 is fixed in the axial direction to the bearing assembly 56 via the locking element 124. The locking element 124 is supported in the axial direction on the bearing inner ring 70 of the bearing 62. The locking member 124 may be threaded to the outer member 104. To this end, the locking element 124 may have an internal thread and the outer part 104 may have an externally threaded section.

The modified roller 18 and the bearing assembly 56 are disposed on the main body 12 obliquely or laterally. The arrangement of the

recesses

58, 60, 66, respectively, is configured to provide a tilted position of the modified roll 18 and bearing assembly 56. Axis of rotation D ₁₈ Extending obliquely to the longitudinal axis a of the body 12. Longitudinal axis A of body 12 and axis of rotation D of modified roll 18 ₁₈ The radial distance therebetween decreases in the direction of the peripheral element 32. By means of this oblique arrangement of the reforming roller 18 and the other reforming

rollers

14, 16, the reforming tool 10 can be retracted after machining the workpiece, i.e. upwardly in the direction of the longitudinal axis a in fig. 6, without damaging the workpiece. In the case of compression of the spring 110 and the resulting relative movement, the formerwill 18, in particular the processing element 32, can be displaced radially inwards in the direction of the longitudinal axis a. In this way, radial protrusion of the

reform rollers

14, 16, 18 may be reduced or eliminated such that the

reform rollers

14, 16, 18 may slide the processing element 32 off of the workpiece without damaging the workpiece.

Fig. 7 shows a cross-sectional view of a retrofit tool 10 according to another embodiment. The retrofit tool 10 has a body 12 and a plurality of retrofit rollers, while only the retrofit roller 14 is shown in fig. 7. The longitudinal axis A of the body 12 is substantially aligned with the axis of rotation AD of the modified roll 14 ₁₄ Extending in parallel.

The reform roller 14 has a reform section 28 and two bearing

sections

54, 126. The modified section 28 is of a tapered configuration. The outer diameter of the tapered modified section 28 decreases from the bearing section 54 in the direction toward the bearing section 126. The modified section 28 is formed in the axial direction between the two bearing

sections

54, 126. The reforming roller 14 is rotatably supported on the main body 12 via a bearing assembly 56. The bearing assembly 56 is configured such that it can withstand the forces Fr, Fa input in FIG. 7 ₁ 、Fa ₂ . During the modification of the workpiece, the forces Fr, Fa ₁ May act on the reform roller 14. For example, when the retrofit tool 10 is pulled out of a tubular workpiece, the force Fa ₂ May act on the reform roller 14.

The modified roller 14 and bearing assembly 56 are received within a recess 66 in the body 12. The bearing assembly 56 includes

bearings

62, 64, 128. Two

bearings

62, 64 interact with the bearing segment 54. Bearings 128 are used to support bearing segments 126. The bearing assembly 56 further includes a support member 130, and the reform roller 14 may be supported on the support member 130 in the axial direction. The support member 130 is secured to the body 12. The support element 130 may be secured to the body 12, for example, via a nut 132. The position of the support element 130 is adjustable in the axial direction.

The modified section 28 of the modified roll 14 projects with its modified region 42 in the radial direction beyond the outer circumferential surface of the body 12. With the modification zone 42, the modification roller 14 may be brought into contact with the inner peripheral surface of the blank to modify the blank (not shown).

According to the present embodiment, the body 12 is made up of three

components

24, 26, 134. The

components

24, 26, 134 may be connected to each other via screws. Bearing segment 126 is supported on member 134 via bearing 128. The part 134 of the body 12 forms the free end of the body 12, with which the retrofit tool 10 can first be driven into the blank. The modified section 28 of the modified roll 14 is received within the member 134. The part 134 has an opening 136, through which opening 136 the modified section 28 extends with its modified region 42 in the radial direction. Member 134 has a smaller outer diameter than

members

24, 26. The modified zone 42 of the modified section 28 projects in the radial direction both beyond the outer circumferential surface 138 of the component 134 and beyond the outer circumferential surface 40 of the

components

24, 26.

To transform the workpiece or workpiece blank into a workpiece having a predetermined configuration, the blank (not shown) is placed into a female mold (not shown). The outer circumferential surface of the blank rests at least partially against the inner circumferential surface of a forming tool (not shown) on which a negative mold of the structure to be formed on the outer surface of the workpiece is formed.

The forming tool and the blank are placed together in rotation. During the retrofitting process, there is a relative movement in the axial direction between the retrofitting tool 10 and the forming tool carrying the blank, while the forming tool carries the blank in rotation. The shaping tool 10 is displaced in the axial direction relative to the forming tool in order to establish a contact between the working

surfaces

34, 36, 38 of the shaping

rollers

14, 16, 18 in the

shaping zones

42, 44, 46 and the blank. By contacting the working

surfaces

34, 36, 38 in the

modification zones

42, 44, 46 with the blank material, the modification rolls 14, 16, 18 begin to rotate about their axes of rotation D ₁₄ 、D ₁₆ 、D ₁₈ And (4) rotating. Modifications of the

typeThe rollers

14, 16, 18 can roll with their respective processing surfaces 34, 36, 38 on the inner circumferential surface of the blank and modify the blank material with the

processing stations

48, 50, 52 in the

modification zones

42, 44, 46. At the same time, the above-described relative movement takes place in the axial direction between the forming tool carrying the blank and the shaping tool 10. The modification tool 10 is moved in the axial direction into the blank to modify the blank material. The modification process can be terminated when the modification tool 10 with the

modification rollers

14, 16, 18 passes and machines the inner circumferential surface area of the predetermined structure to be configured on the outer circumferential surface of the blank. The conversion tool 10 is moved in the direction of the longitudinal axis a into and through the blank, so that the inner circumferential surface of the blank can be machined.

The blank material is pressed into the female mold onto the inner circumferential surface of the forming tool by relative displacement and point-like, linear or local contact of the

processing locations

48, 50, 52 of the processing surfaces 34, 36, 38 of the reforming rolls 14, 16, 18 with the blank material. In other words, the blank material may yield into the female die due to the pressure exerted on the blank material by the relative movement of the

reform rollers

14, 16, 18 with respect to the blank. This enables a desired configuration to be formed on the outer peripheral surface of the blank 16. The rotational speed at which the forming tool carries the blank into rotation can be matched to the speed of the axial relative displacement of the modification tool 10 with respect to the forming tool, so that during the relative displacement in the axial direction between the modification tool 10 and the forming tool, the modification tool 10 can machine the entire inner circumferential surface of the blank.

The above method may also be performed using a stationary forming tool and a rotating retrofit tool 10. The conversion tool 10 is then rotated about the longitudinal axis a and simultaneously moved in the axial direction relative to the forming tool carrying the blank. In this case, the shaping

rollers

14, 16, 18 can also roll on the inner circumferential surface of the blank by contact with the blank and about their rotational axis D ₁₄ 、D ₁₆ 、D ₁₈ And (4) rotating. In this case, there is also a double rotation, i.e. the body 12 and the reforming

rollers

14, 16, 18 rotate about the longitudinal axis a, the reforming

rollers

14, 16, 18 rotate about the rotation axis D ₁₄ 、D ₁₆ 、D ₁₈ And (4) rotating.

According to the invention, complex structures can be manufactured on workpieces quickly, at low cost and with high precision by modification.

Claims

1. A modification tool (10) for modifying a workpiece, in particular a tubular workpiece, comprising:

at least one body (12) having a longitudinal axis (A); and

at least one reforming roller (14, 16, 18) having at least one rotation axis (D) ₁₄ 、D ₁₆ 、D ₁₈ ) And is rotatably supported on the at least one main body (12), wherein the at least one reforming roller (14, 16, 18) has at least one reforming section (28, 30, 32), wherein the at least one reforming section (28, 30, 32) protrudes beyond at least one radially outer surface (40) of the at least one main body (12) at least in a radial direction with respect to a longitudinal axis (a) of the at least one main body (12) to form at least one reforming zone (48, 50, 52) for reforming the workpiece.

2. The retrofit tool (10) according to claim 1,

wherein at least one reforming roller (14, 16, 18) has at least one bearing segment (54), the bearing segment (54) being at least partially accommodated in at least one main body (12).

3. The retrofit tool (10) according to claim 1 or 2,

wherein the reforming tool (10) has at least one bearing assembly (56) for supporting the at least one reforming roll (14, 16, 18) on the at least one body (12).

4. The retrofit tool (10) according to claim 3,

wherein the at least one bearing assembly (56) has at least one bearing (62, 64), the at least one bearing (62, 64) rotatably supporting the at least one bearing segment (54) of the at least one modified roll (14, 16) on the at least one body (12).

5. The retrofit tool (10) according to any of the claims 2 to 4,

wherein at least the bearing segment (54) has at least one inner part (102) and at least one outer part (104), wherein the at least one outer part (104) is connected to the at least one bearing assembly (54).

6. The retrofit tool (10) according to claim 5,

wherein the at least one inner part (102) and the at least one outer part (104) are displaceable relative to each other.

7. The retrofit tool (10) according to any of the preceding claims,

wherein the axis of rotation (D) of at least one of the reforming rolls (14, 16, 18) ₁₄ 、D ₁₆ 、D ₁₈ ) Extends at least substantially parallel to the longitudinal axis (A) of the body (12).

8. The retrofit tool (10) according to any of the claims 1 to 6,

wherein the axis of rotation (D) of at least one of the reforming rolls (14, 16, 18) ₁₄ 、D ₁₆ 、D ₁₈ ) Extends obliquely to the longitudinal axis (A) of the body (12).

9. The retrofit tool (10) according to claim 7 or 8,

wherein at least a reforming section (28, 30, 32) of at least one reforming roller (14, 16, 18) is along a rotation axis (D) of at least one reforming roller (14, 16, 18) ₁₄ 、D ₁₆ 、D ₁₈ ) Can be shifted.

10. The retrofit tool (10) according to any of the claims 1 to 9,

wherein the radial position and/or the axial position of at least one reforming section (28, 30, 32) of at least one reforming roller (14, 16, 18) can be changed mechanically, pneumatically or hydraulically.

11. The retrofit tool (10) according to any of the claims 1 to 10,

wherein at least one modified roll (14, 16, 18) has at least two bearing segments (54), at least one modified segment (28, 30, 32) being arranged between at least two bearing segments (54) in the axial direction.

12. The retrofit tool (10) according to claim 11,

wherein the at least one main body (12) is designed in such a way that the at least two bearing segments (54) are at least partially accommodated in the main body (12).

13. The retrofit tool (10) according to any of the claims 1 to 12,

wherein at least one of the reforming sections (28, 30, 32) has, in the region of its largest outer diameter, at least one machining station (48, 50, 52) configured for reforming the workpiece.

14. The retrofit tool (10) according to claim 13,

wherein at least one of the modified sections (28, 30, 32) is curved or arched in the region of its largest outer diameter.

15. The retrofit tool (10) according to any of the claims 1 to 14,

wherein at least one of the modified sections (28, 30, 32) is at least partially of conical or truncated conical configuration.

16. The retrofit tool (10) according to any of the claims 1 to 15,

wherein the reforming tool (10) has a plurality of reforming rollers (14, 16, 18).

17. The retrofit tool of claim 16,

wherein the reforming rollers (14, 16, 18) are arranged on the main body (12) offset from each other by a predetermined angular distance around the longitudinal axis (A) of the main body (12).

18. The retrofit tool of claim 16 or 17,

wherein the axis of rotation (D) of the reforming roller (14, 16, 18) ₁₄ 、D ₁₆ 、D ₁₈ ) Is arranged on a radius (R1) about a longitudinal axis (a) of the body (12).

19. The retrofit tool (10) according to any of the claims 1 to 18,

wherein the body (12) is of multipart construction.

20. A retrofit apparatus for retrofitting a workpiece, comprising:

at least one retrofit tool (10) according to any one of claims 1 to 19; and

at least one forming tool having a negative mold for at least a part of the structure to be structured on the workpiece, wherein the at least one shaping tool (10) and the at least one forming tool are displaceable relative to each other in an axial direction, wherein the at least one forming tool and/or the at least one shaping tool (10) are rotatable.

21. The retrofit device of claim 20,

wherein the at least one forming tool and the at least one shaping tool (10) are arranged coaxially.

22. The retrofit apparatus of claim 20 or 21,

wherein the female die is configured on the inner circumferential surface of the forming tool.

23. Method for modifying a workpiece, wherein at least one forming tool and at least one modifying tool (10) according to one of claims 1 to 19 are provided for modifying the workpiece, wherein the at least one forming tool has a negative of at least a part of a structure to be structured on the workpiece, wherein the at least one modifying tool (10) and the at least one forming tool interact for modifying the at least one workpiece such that material of the workpiece is pressed into the negative of the forming tool in order to structure the structure on the workpiece.