Cooling pipe rib making machine and rib making method

Abstract

The invention relates to the technical field of rib rolling molds, in particular to a cooling pipe rib manufacturing machine and a rib manufacturing method. According to the cooling pipe reinforcement machine, in a positioning unit, a first clamping die and a second clamping die are each provided with an arc-shaped groove; the arc-shaped groove is used for accommodating a pipe fitting; and two avoiding grooves which are coaxially spaced are formed in the inner wall of the arc-shaped groove. The first driving unit drives the first clamping die and the second clamping die to get close to or away from each other. In the rolling unit, a first roller and a second roller are arranged at an interval along the axis of the rotating shaft; the distance between the first rolling wheel and the second rolling wheel is equal to the distance between the two receding grooves. A first accommodating groove for accommodating the first roller and a second accommodating groove for accommodating the second roller are formed in the rotating shaft; the first roller and the second roller protrude out of the outer circumferential wall of the rotating shaft by a first height and a second height respectively; the first height is greater than the second height. The second driving unit drives the rotating shaft to rotate. In this way, the problem of how to ensure the consistency of the protruding heights of the multiple rolling ribs is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling rib molds, and more specifically, to a cooling pipe ribbing machine and a ribbing method. Background Art

[0002] In the production process of the cooling water pipe of an automotive engine retarder, a rolling forming process is usually adopted to plastically deform the end of a pipe fitting (i.e., the cooling water pipe). A plurality of annular convex structures (i.e., rolling ribs) are processed on the surface of the pipe end through a roller device driven by hydraulic pressure or mechanical transmission. This process involves core components such as a special rolling die, a pipe fitting clamping and positioning mechanism, and a synchronous transmission device. Among them, the rolling die is designed with a specific cavity structure according to the size of the target rolling rib, and the deformation amount is controlled by adjusting the roller spacing and the feeding pressure; the clamping and positioning mechanism uses a multi-point hydraulic fixture to fix the axis of the pipe fitting to ensure no radial offset during the processing; the synchronous transmission device coordinates the rotation of the roller and the axial feeding movement to achieve continuous and uniform plastic deformation. During the implementation of the process, parameters such as the rolling pressure, forming temperature, and feeding speed need to be strictly controlled to ensure that the geometric shape of the rolling rib meets the design requirements. The double-rolling-rib structure realizes the axial positioning and anti-pull-off function at the pipe connection through the interference fit with the clamp during subsequent assembly, and its high consistency directly affects the sealing effect and connection reliability.

[0003] In the prior art, the cavity wear caused by the long-term use of the rolling die will change the actual extrusion gap. When there are differences in the wear degrees of the dies between the double-rolling-rib forming stations, the height deviation of the two protrusions will exceed the process tolerance range. In addition, the differences in the dynamic response characteristics of the equipment transmission system will also cause problems: during the double-station synchronous processing, factors such as the pressure pulsation of the hydraulic system, the accumulation of mechanical transmission clearances, and the deviation of servo control accuracy make it impossible for the two forming stations to maintain exactly the same loading curve. The core contradiction of the above problems lies in the lack of a closed-loop compensation mechanism for the real-time attenuation of the die state and the fluctuation of the equipment movement accuracy in the existing process system, resulting in the difficulty of stably controlling the height consistency of the double rolling ribs. Summary of the Invention

[0004] To solve the problem of how to ensure the height consistency between multiple rolling ribs, the present invention provides a cooling pipe ribbing machine and a ribbing method.

[0005] In a first aspect, the present invention provides a cooling pipe ribbing machine, which includes: A positioning unit, the positioning unit includes a first clamping die and a second clamping die; arc-shaped grooves are provided on both the first clamping die and the second clamping die; the arc-shaped grooves are used to accommodate the pipe fitting; two arc-shaped avoidance grooves are provided on the inner circumferential wall of the arc-shaped groove; the avoidance grooves are coaxial with the arc-shaped groove; A first driving unit that drives the first clamping die and the second clamping die to approach or move away from each other; when the first clamping die and the second clamping die clamp the pipe fitting, the arc-shaped groove on the first clamping die is coaxial with the arc-shaped groove on the second clamping die. A rolling unit, the rolling unit includes a rotating shaft, a first roller and a second roller; the first roller and the second roller are arranged at intervals along the axis of the rotating shaft; the distance between the first roller and the second roller is equal to the distance between the two avoiding grooves; a first receiving groove and a second receiving groove are formed on the outer circumferential wall of the rotating shaft; the first receiving groove is used to receive the first roller; the second receiving groove is used to receive the second roller; the first roller protrudes from the outer circumferential wall of the rotating shaft by a first height; the second roller protrudes from the outer circumferential wall of the rotating shaft by a second height; the first height is greater than the second height. A second driving unit that drives the rotating shaft to rotate; the distance between the first roller and the second driving unit is greater than the distance between the second roller and the second driving unit. A third driving unit that drives the rolling unit to move.

[0006] In some embodiments, the rolling unit further includes a first mounting shaft; a first mounting hole is formed on the rotating shaft; the first mounting shaft is located in the first mounting hole; the first mounting shaft is detachably connected to the rotating shaft; the first receiving groove and the second receiving groove are respectively communicated with the first mounting hole. When the first roller is located in the first receiving groove and the second roller is located in the second receiving groove, the first roller and the second roller are respectively coaxially connected to the first mounting shaft.

[0007] In some embodiments, the axis of the first mounting hole is parallel to and has a spacing from the axis of the rotating shaft.

[0008] In some embodiments, the included angle between the axis of the first mounting hole and the axis of the rotating shaft is greater than 0° and less than 5°, the axis of the first mounting hole and the axis of the rotating shaft are in the same plane, and the axial spacing between the first mounting hole and the rotating shaft gradually increases in the direction away from the second driving unit.

[0009] In some embodiments, a second mounting hole is formed in the rotating shaft; a third receiving groove and a fourth receiving groove are formed in the outer circumferential wall of the rotating shaft; the third receiving groove and the fourth receiving groove are spaced apart along the axis of the rotating shaft; the distance between the third receiving groove and the second driving unit is greater than the distance between the fourth receiving groove and the second driving unit; the third receiving groove and the fourth receiving groove communicate with the second mounting hole respectively; the distance between the third receiving groove and the fourth receiving groove is equal to the distance between the first receiving groove and the second receiving groove; the third receiving groove is used to receive the first roller; the fourth receiving groove is used to receive the second roller; The rolling unit further includes a second mounting shaft; the second mounting shaft is located in the second mounting hole; the second mounting shaft is detachably connected to the rotating shaft; When the first roller is located in the third receiving groove and the second roller is located in the fourth receiving groove, the first roller and the second roller are coaxially connected to the second mounting shaft respectively.

[0010] In some embodiments, the axis of the second mounting hole is parallel to the axis of the rotating shaft and has a distance therebetween.

[0011] In a second aspect, the present invention discloses a method for ribbing a cooling pipe, which is applied to the cooling pipe ribbing machine described in any one of the above embodiments; the method for ribbing a cooling pipe includes: Step S10, placing the pipe to be ribbed between the first clamping die and the second clamping die; controlling the first driving unit to drive the first clamping die and the second clamping die to approach each other until the clamping and positioning of the pipe is completed; wherein, in the state where the clamping and positioning of the pipe is completed, the pipe is clamped in the arc grooves of the first clamping die and the second clamping die; Step S20, based on the completion of the clamping and positioning of the pipe, controlling the third driving unit to drive the rolling unit to move towards the inside of the pipe until the rolling unit moves to a preset position; wherein, in the state where the rolling unit is at the preset position, the rotating shaft is eccentrically arranged with respect to the pipe, the first roller and the second roller are located on the side of the axis of the rotating shaft close to the axis of the pipe, and the distance between the rotating shaft and the inner wall of the pipe is less than the first height; the distance between the rotating shaft and the inner wall of the pipe is less than the second height; Step S30, based on the rolling unit being at the preset position, controlling the second driving unit to drive the rolling unit to rotate around the axis of the arc groove; Step S40, based on the rotation duration of the rolling unit reaching a preset duration, controlling the third driving unit to drive the rolling unit to disengage from the pipe; Step S50, based on the rolling unit disengaging from the pipe fitting, control the first driving unit to drive the first clamping die and the second clamping die to move away from each other, and the rib forming is completed.

[0012] In some embodiments, a second mounting hole is provided on the rotating shaft; a third receiving groove and a fourth receiving groove are provided on the outer circumferential wall of the rotating shaft; the rolling unit further includes a second mounting shaft; the second mounting shaft is located in the second mounting hole; the second mounting shaft is detachably connected to the rotating shaft; The step S20 includes: Step S21, based on the completion of the clamping and positioning of the pipe fitting, obtain the usage status and usage duration of the rolling unit; wherein, the usage status includes a first status and a second status; in the first status, the first roller is located in the first receiving groove, and the second roller is located in the second receiving groove; in the second status, the first roller is located in the third receiving groove, and the second roller is located in the fourth receiving groove; Step S22; based on the rolling unit being in the first status and the usage duration being less than the first service life, execute step S25; Step S23, based on the rolling unit being in the first status and the usage duration being greater than the first service life, adjust the rolling unit to the second status; Step S24, based on the rolling unit switching to the second status, execute step S25; Step S25, control the third driving unit to drive the rolling unit to move towards the inside of the pipe fitting until the rolling unit moves to a preset position; wherein, in the state of the rolling unit at the preset position, the rotating shaft is eccentrically arranged with respect to the pipe fitting, the first roller and the second roller are located on the side of the axis of the rotating shaft close to the axis of the pipe fitting, and the distance between the rotating shaft and the inner wall of the pipe fitting is less than the first height; the distance between the rotating shaft and the inner wall of the pipe fitting is less than the second height; The step S40 includes: Step S41, based on the rotation duration of the rolling unit reaching the preset duration, control the third driving unit to drive the rolling unit to disengage from the pipe fitting; and accumulate the preset duration as the usage duration of the rolling unit.

[0013] In some embodiments, the step S24 includes: Step S241, based on the rolling unit switching to the second status and the usage duration being less than the second service life, execute step S25; wherein, the second service life is greater than the first service life.

[0014] In some embodiments, the step S24 further includes: Step S242: Based on the rolling unit switching to the second state and the usage duration being greater than the second service life, a signal for replacing the rolling unit is issued.

[0015] To solve the problem of how to ensure the consistency of the protrusion heights between multiple bead rolling processes, the present invention has the following advantages: Through the coaxial arc grooves and avoidance grooves structures on the first clamping die and the second clamping die in the positioning unit, and in cooperation with the first driving unit driving the first clamping die and the second clamping die to clamp the pipe fitting, the accurate alignment of the axis of the pipe fitting with the avoidance groove is achieved; by using the first roller and the second roller arranged on the rotating shaft in the rolling unit, the rolling unit is driven by the third driving unit to move along the axial direction of the pipe fitting, and at the same time, the rotating shaft is driven to rotate by the second driving unit; wherein the distance between the first roller and the second roller is set to be equal to the distance between the two avoidance grooves, and the protruding height of the first roller is greater than the protruding height of the second roller. When the rotating shaft generates a slight deflection under the radial force, through the design of the difference in the protruding heights of the two rollers, the difference in the contact pressures of the two rollers caused by the deflection of the rotating shaft is offset, so that the double bead rolling formed by the first roller and the second roller at the end of the pipe fitting maintains a uniform plastic deformation amount during the rolling process, thereby ensuring the dimensional consistency of the protruding heights of the double bead rolling, and finally solving the problem of inconsistent protruding heights caused by the difference in the roller torques during the formation of the double bead rolling at the end of the pipe fitting. Description of the Drawings

[0016] Figure 1 Shows a schematic diagram of a cooling pipe bead rolling machine of an embodiment from the first perspective; Figure 2 Shows Figure 1 A schematic diagram of the cooling pipe bead rolling machine in the embodiment from the second perspective; Figure 3 Shows Figure 2 A side view schematic diagram of the cooling pipe bead rolling machine in the embodiment; Figure 4 Shows Figure 3 A schematic diagram of the A-A cross-section of the cooling pipe bead rolling machine in the embodiment; Figure 5 Shows a schematic diagram of a pipe fitting of an embodiment; Figure 6 Shows a schematic diagram of the positioning unit of a cooling pipe bead rolling machine of an embodiment from the first perspective; Figure 7 Shows Figure 6 A schematic diagram of the positioning unit of the cooling pipe bead rolling machine in the embodiment from the second perspective; Figure 8 Shows a schematic diagram of the rolling unit of a cooling pipe bead rolling machine of an embodiment; Figure 9 Shows Figure 8Front view schematic diagram of the rolling unit of the cooling pipe ribbing machine in the embodiment; Figure 10 Shows Figure 8 Side view schematic diagram of the rolling unit of the cooling pipe ribbing machine in the embodiment; Figure 11 Shows Figure 8 Top view schematic diagram of the rolling unit of the cooling pipe ribbing machine in the embodiment; Figure 12 Shows Figure 11 Schematic cross - sectional view of the rolling unit of the cooling pipe ribbing machine in the embodiment along B - B; Figure 13 Schematic diagram of the rolling unit of the cooling pipe ribbing machine in another embodiment; Figure 14 Schematic flow diagram of a method for cooling pipe ribbing in an embodiment.

[0017] Reference numerals: 10 pipe fitting; 20 positioning unit; 21 first clamping die; 22 second clamping die; 23 arc groove; 24 avoidance groove; 30 rolling unit; 31 rotating shaft; 311 first receiving groove; 312 second receiving groove; 313 first mounting hole; 314 second mounting hole; 315 third receiving groove; 316 fourth receiving groove; 317 bolt hole; 32 first roller; 33 second roller. Detailed implementation manners

[0018] Now, the present disclosure will be described with reference to several exemplary embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0019] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. In addition, the terms "mounted", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality of" is two or more.

[0020] In the existing cooling pipe ribbing machine equipment, there is a problem that the heights of the double ribs on the end of the pipe fitting 10 are inconsistent during the double-rib rolling forming process. In the existing structure, after multiple rolling operations, the protruding height parameters are likely to shift due to the wear of the rollers or the change of the cantilever deflection of the rotating shaft 31, thereby affecting the uniformity of the double-rib forming height.

[0021] In this embodiment, in order to ensure the consistency when multiple ribbing processes are performed on the end of the pipe fitting 10, this embodiment discloses a cooling pipe ribbing machine. As Figure 1 , Figure 2 , Figure 3 shown, the cooling pipe ribbing machine includes a positioning unit 20, a first driving unit, a rolling unit 30, a second driving unit, and a third driving unit. The positioning unit 20 includes a first clamping die 21 and a second clamping die 22; as Figure 6 , Figure 7As shown, arc-shaped grooves 23 are provided on both the first clamping die 21 and the second clamping die 22; the arc-shaped grooves 23 are used to accommodate the pipe fitting 10; two arc-shaped avoidance grooves 24 are provided on the inner circumferential wall of the arc-shaped groove 23; the avoidance grooves 24 are coaxial with the arc-shaped groove 23. By providing the first clamping die 21 and the second clamping die 22 of the positioning unit 20, and both are provided with arc-shaped grooves 23 for accommodating the pipe fitting 10, positioning support can be provided for the pipe fitting 10. At the same time, avoidance grooves 24 coaxial with the arc-shaped groove 23 are provided on the inner circumferential wall of the arc-shaped groove 23, and the avoidance grooves 24 can provide an avoidance space for the pipe fitting 10 during the rolling rib processing, facilitating the precise processing of the pipe fitting 10 by subsequent rolling operations; the arc-shaped grooves 23 and the avoidance grooves 24 of the first clamping die 21 and the second clamping die 22 are coaxially arranged, which can ensure that the axis of the pipe fitting 10 is aligned during positioning and improve the positioning accuracy. In other embodiments, such as Figure 6 , Figure 7 As shown, when the first clamping die 21 and the second clamping die 22 are spliced, the arc-shaped grooves 23 of the two can surround to form an accommodating space, and the inner diameter of the accommodating space at one end away from the rolling unit 30 gradually decreases towards the other end to match the outer diameter of the pipe fitting 10, so as to form a flared opening at the end of the accommodating space away from the rolling unit 30, facilitating the positioning and fixing of the pipe fitting 10.

[0022] The first driving unit drives the first clamping die 21 and the second clamping die 22 to approach or separate from each other; when the first clamping die 21 and the second clamping die 22 clamp the pipe fitting 10, the arc-shaped groove 23 on the first clamping die 21 is coaxial with the arc-shaped groove 23 on the second clamping die 22. By controlling the approaching or separating action of the first clamping die 21 and the second clamping die 22 through the first driving unit and making the arc-shaped grooves 23 of the two coaxial when clamping the pipe fitting 10, the clamping and fixing of the pipe fitting 10 can be realized, ensuring that the pipe fitting 10 is stable and does not shake during the rolling process; the pipe fitting 10 is clamped coaxially by the arc-shaped grooves 23, which can avoid the deformation of the pipe fitting 10 or the deviation of the rolling rib position caused by the offset of the clamping position, and ensure the processing accuracy.

[0023] Such as Figure 8 , Figure 9 As shown, the rolling unit 30 includes a rotating shaft 31, a first roller 32 and a second roller 33; the first roller 32 and the second roller 33 are arranged at intervals along the axis of the rotating shaft 31; as Figure 11 shown, the distance between the first roller 32 and the second roller 33 is equal to the distance between the two avoidance grooves 24; a first accommodation groove 311 and a second accommodation groove 312 are provided on the outer circumferential wall of the rotating shaft 31; as Figure 12As shown, the first receiving groove 311 is used to receive the first roller 32; the second receiving groove 312 is used to receive the second roller 33; the first roller 32 protrudes from the outer circumferential wall of the rotating shaft 31 by a first height; the second roller 33 protrudes from the outer circumferential wall of the rotating shaft 31 by a second height; the first height is greater than the second height. The rolling unit 30 is provided with the rotating shaft 31, the first roller 32 and the second roller 33, and the first roller 32 and the second roller 33 are arranged at intervals along the axis of the rotating shaft 31, and the spacing is the same as the spacing of the avoidance groove 24. At the same time, the first receiving groove 311 and the second receiving groove 312 for receiving the first roller 32 and the second roller 33 are respectively opened on the outer circumferential wall of the rotating shaft 31, so that the first roller 32 and the second roller 33 protrude from the outer circumferential wall of the rotating shaft 31 at different heights, and the first height is greater than the second height. By setting the protruding heights of the first roller 32 and the second roller 33 to be different, it is avoided that when the rotating shaft 31 deflects, the first roller 32 and the second roller 33 have different rolling forces due to different rotating forces, resulting in different heights of the two rolled ribs during the rib rolling process.

[0024] The second driving unit drives the rotating shaft 31 to rotate; the distance between the first roller 32 and the second driving unit is greater than the distance between the second roller 33 and the second driving unit. By driving the rotating shaft 31 to rotate through the second driving unit, the torque is transmitted to the first roller 32 and the second roller 33 to form a squeezing force, thereby squeezing the inner wall of the pipe fitting 10 to form a raised rib. Since the distance between the first roller 32 and the second driving unit is greater than the distance between the second roller 33 and the second driving unit, the losses of the torque transmitted to the first roller 32 and the second roller 33 are different, so that the rotating shaft 31 drives the first roller 32 and the second roller 33 to generate different squeezing forces, and the squeezing force of the second roller 33 farther from the second driving unit on the inner wall of the pipe fitting 10 is small. In addition, the distance from the first roller 32 to the second driving unit, that is, the force arm, is longer. Therefore, when receiving the reaction force of the pipe fitting 10, the end of the rotating shaft 31 far from the second driving unit is prone to flexural deformation, which further aggravates the loss of torque and reduces the squeezing force of the first roller 32 on the pipe fitting 10. Therefore, in the present invention, the first roller 32 and the second roller 33 are set to have different protruding heights, thereby forming a compensation mechanism, so that the squeezing forces of the first roller 32 and the second roller 33 on the pipe fitting 10 are basically the same, and two rolled ribs with the same depth can be formed when the first roller 32 and the second roller 33 roll the pipe fitting 10, meeting the rib-making requirements of the pipe fitting 10; reasonably setting the distances between the first roller 32 and the second roller 33 and the second driving unit respectively can balance the loss of the rotating torque and the compensation of the squeezing force, making the rolling process more stable.

[0025] The third driving unit drives the rolling unit 30 to move. The third driving unit drives the rolling unit 30 to move, so that the rolling unit 30 can approach or move away from the pipe 10, realize the rolling processing and withdrawal operation of the pipe 10, and ensure the smooth progress of the rib making process; the setting of driving the rolling unit 30 to move is convenient for adjusting the position of the rolling unit 30 according to the length of the pipe 10 and the rib making position, thereby improving the applicability of the equipment.

[0026] In other embodiments, Figure 5 As shown, the pipe 10 clamped by the first clamping die 21 and the second clamping die 22 can be a curved tube or a straight tube. When clamping the pipe 10 , the present invention can make adaptive adjustments according to the structure of the pipe 10 .

[0027] In this embodiment, the rolling unit 30 further includes a first mounting shaft; Figure 4 As shown, a first mounting hole 313 is provided on the rotating shaft 31; the first mounting shaft is located in the first mounting hole 313; the first mounting shaft is detachably connected to the rotating shaft 31; the first receiving groove 311 and the second receiving groove 312 are respectively connected to the first mounting hole 313. The rolling unit 30 is provided with a first mounting shaft, the rotating shaft 31 is provided with a first mounting hole 313, the first mounting shaft is located in the first mounting hole 313 and is detachably connected to the rotating shaft 31, and the first receiving groove 311 and the second receiving groove 312 are connected to the first mounting hole 313. Through the detachably connected first mounting shaft and the rotating shaft 31, and the connected receiving groove and the mounting hole, it is convenient to install and remove the first roller 32 and the second roller 33, and it is convenient to maintain or replace the first roller 32 and the second roller 33; the structure in which the receiving groove and the mounting hole are connected can enable the first roller 32 and the second roller 33 to be stably installed on the rotating shaft 31 through the first mounting shaft, thereby ensuring the transmission accuracy during rolling.

[0028] When the first roller 32 is located in the first receiving groove 311 and the second roller 33 is located in the second receiving groove 312, the first roller 32 and the second roller 33 are coaxially connected to the first installation axis respectively. When the first roller 32 and the second roller 33 are located in the first receiving groove 311 and the second receiving groove 312 respectively, the two are coaxially connected to the first installation axis, so that the first roller 32 and the second roller 33 can control the number of rotations of the rotating shaft 31 when processing the pipe 10 at the same time, so as to ensure the consistency of the formed rolling ribs. At the same time, when the first roller 32 and the second roller 33 process the pipe 10, the two can rotate around the first installation axis, so that the wear of the first roller 32 and the second roller 33 in the circumferential direction is reduced, and the service life of the two is extended. In other embodiments, when the first roller 32 and the second roller 33 have the same size, the first roller 32 and the second roller 33 can be set on different axes, so as to ensure that the protrusion heights of the first roller 32 and the second roller 33 are different, so as to ensure the consistency between the double rolling ribs formed by roll forming.

[0029] In this embodiment, as Figure 4 , Figure 12 shown, the axis of the first mounting hole 313 is parallel to and spaced from the axis of the rotating shaft 31. Through the above arrangement, it is convenient to control the protruding height of the first roller 32 and the second roller 33, so that the rollers can protrude from the outer circumferential wall of the rotating shaft 31 at an appropriate height to meet the processing requirements of different bead heights; the design of the axis spacing provides a structural basis for adjusting the protruding height of the rollers, enabling the equipment to adapt to a variety of bead specifications.

[0030] In this embodiment, the included angle between the axis of the first mounting hole 313 and the axis of the rotating shaft 31 is greater than 0° and less than 5°, the axis of the first mounting hole 313 and the axis of the rotating shaft 31 are in the same plane, and the axial distance between the first mounting hole 313 and the rotating shaft 31 gradually increases in the direction away from the second driving unit. By arranging the first mounting hole 313 to be inclined in the rotating shaft 31 and forming a slight included angle with the axis of the rotating shaft 31, the cantilever deflection deformation amount during the deflection of the rotating shaft 31 can be compensated, avoiding the inclination of the first mounting hole 313 due to the cantilever bending of the rotating shaft 31, resulting in the skew of the first roller 32 and the second roller 33, and ensuring that the first roller 32 and the second roller 33 maintain the correct posture and sufficient extrusion force during the rolling process, improving the stability of the bead quality.

[0031] In this embodiment, as Figure 13 shown, a second mounting hole 314 is provided on the rotating shaft 31; a third receiving groove 315 and a fourth receiving groove 316 are provided on the outer circumferential wall of the rotating shaft 31; the third receiving groove 315 and the fourth receiving groove 316 are spaced along the axis of the rotating shaft 31; the distance between the third receiving groove 315 and the second driving unit is greater than the distance between the fourth receiving groove 316 and the second driving unit; the third receiving groove 315 and the fourth receiving groove 316 are respectively communicated with the second mounting hole 314; the distance between the third receiving groove 315 and the fourth receiving groove 316 is equal to the distance between the first receiving groove 311 and the second receiving groove 312; the third receiving groove 315 is used to receive the first roller 32; the fourth receiving groove 316 is used to receive the second roller 33. By providing the second mounting hole 314 and the corresponding receiving grooves, a second mounting shaft can be provided in the second mounting hole 314, so that after the rotating shaft 31 is used for a long time and its cantilever deflection deformation is too large, the first roller 32 and the second roller 33 on the first mounting shaft can be mounted on the second mounting shaft to change the mounting position of the rollers, thereby adjusting the protruding height and stress state of the first roller 32 and the second roller 33, so as to extend the service life of the rolling unit 30 and avoid affecting the bead accuracy of the rolling forming due to the excessive cantilever deflection deformation amount of the rotating shaft 31.

[0032] In this embodiment, the rolling unit 30 further includes a second mounting shaft; the second mounting shaft is located in the second mounting hole 314; the second mounting shaft is detachably connected to the rotating shaft 31. Through the detachable second mounting shaft, it is convenient to install the first roller 32 and the second roller 33 into the second mounting hole 314, realizing the switching of the roller mounting positions. When the cantilever deformation of the rotating shaft 31 is too large, by replacing the mounting shaft and the receiving groove, the first roller 32 and the second roller 33 can continue to work normally, extending the service life of the rolling unit 30.

[0033] In some other embodiments, as Figure 12 , Figure 13 shown, a bolt hole 317 is formed at one end of the rotating shaft 31 away from the first roller. A plurality of bolt holes 317 can be arranged at intervals along the circumferential direction of the rotating shaft 31. One of the bolt holes 317 can communicate with the first mounting hole 313, and another bolt hole 317 can communicate with the second mounting hole 314. A locking bolt can be placed in the bolt hole 317, and the locking bolt is threadedly connected to the bolt hole 317. One end of the locking bolt abuts against one side in the radial direction of the first mounting shaft and / or the second mounting shaft, for fixing the first mounting shaft and the second mounting shaft.

[0034] In this embodiment, in the state where the first roller 32 is located in the third receiving groove 315 and the second roller 33 is located in the fourth receiving groove 316, the first roller 32 and the second roller 33 are respectively coaxially connected to the second mounting shaft. When the first roller 32 and the second roller 33 are respectively located in the third receiving groove 315 and the fourth receiving groove 316, they are coaxially connected to the second mounting shaft. Through the coaxial connection structure, it is ensured that the first roller 32 and the second roller 33 can rotate stably at the new mounting positions, guaranteeing the rotation accuracy and synchronism of the first roller 32 and the second roller 33 during the rolling process, thereby ensuring the quality of the formed rolling ribs.

[0035] In this embodiment, the axis of the second mounting hole 314 is parallel to the axis of the rotating shaft 31 and there is a gap between them. The axis of the second mounting hole 314 is parallel to the axis of the rotating shaft 31 and there is a gap between them. Since the first mounting hole 313 is pre-set to tilt in advance, the cantilever deflection deformation after long-term use can make the axis of the first mounting hole 313 approach the axis of the parallel rotating shaft 31. At this time, the axis of the second mounting hole 314 gradually tilts, that is, the axis of the second mounting hole 314 and the axis of the rotating shaft 31 can gradually form an angle as the use time of the rolling unit 30 increases. When the first roller 32 and the second roller 33 are installed to the second mounting shaft, the above-mentioned setting can dynamically compensate for the cantilever deflection deformation of the rotating shaft 31, ensuring that the first roller 32 and the second roller 33 are each accurately installed in the second mounting hole 314. When the first roller 32 and the second roller 33 respectively abut against the inner wall of the pipe 10, the first height corresponding to the first roller 32 preset in advance is greater than the second height corresponding to the second roller 33 and the axis of the second mounting hole 314 is tilted under the influence of the cantilever deformation of the rotating shaft 31. This feature can effectively compensate for the defect that the first roller 32 and the second roller 33 have different rolling depths due to different torques, thereby ensuring the consistency of the height of the formed rolling rib protrusion and extending the service life of the rolling unit 30.

[0036] In other embodiments, the cross-section of the rotating shaft 31 may be elliptical, so as to enhance the compression resistance of the rotating shaft 31 and ensure smooth rib rolling.

[0037] In other embodiments, Figure 10 As shown, the arc of one side of the rotating shaft 31 where the first roller 32 and the second roller 33 are arranged is smaller than the arc of the side of the rotating shaft 31 away from the first roller 32 and the second roller 33, and the arcs on both sides are not concentric, so as to avoid the rotating shaft 31 from interfering with the pipe mouth when extending into the pipe fitting 10, and at the same time, the thickness of the side of the rotating shaft 31 away from the first roller 32 and the second roller 33 is thicker than the elliptical shape, thereby enhancing the structural strength of the rotating shaft 31 and avoiding the risk of severe deformation or fracture of the rotating shaft 31 due to excessive pressure during the rolling process. In addition, such a setting only requires cutting one side of the semi-finished cylindrical rotating shaft 31 to obtain the formed rotating shaft 31, reducing the difficulty of processing.

[0038] In this embodiment, a cooling pipe rib method is disclosed, and the cooling pipe rib method can be applied to the cooling pipe rib machine of any of the above embodiments. Figure 14 As shown, the cooling pipe rib method includes steps S10 to S50, and the above steps can be described in detail below: Step S10, the pipe fitting 10 to be ribbed is located between the first clamping die 21 and the second clamping die 22; control the first driving unit to drive the first clamping die 21 and the second clamping die 22 to approach each other until the pipe fitting 10 is clamped and positioned; wherein, in the state where the pipe fitting 10 is clamped and positioned, the pipe fitting 10 is clamped in the arc-shaped grooves 23 of the first clamping die 21 and the second clamping die 22. Through this step, the positioning and fixing of the pipe fitting 10 are realized, providing a stable processing basis for subsequent rolling ribbing; being clamped and positioned in the arc-shaped groove 23 can ensure that the axis of the pipe fitting 10 is aligned with the axis of the equipment, guaranteeing the accuracy of the rolling position.

[0039] Step S20, based on the completion of the clamping and positioning of the pipe fitting 10, control the third driving unit to drive the rolling unit 30 to move towards the inside of the pipe fitting 10 until the rolling unit 30 moves to a preset position; wherein, in the state where the rolling unit 30 is at the preset position, the rotating shaft 31 is eccentrically arranged with respect to the pipe fitting 10, the first roller 32 and the second roller 33 are located on the side of the axis of the rotating shaft 31 close to the axis of the pipe fitting 10, and the distance between the rotating shaft 31 and the inner wall of the pipe fitting 10 is less than the first height; the distance between the rotating shaft 31 and the inner wall of the pipe fitting 10 is less than the second height. After the pipe fitting 10 is clamped and positioned, control the third driving unit to drive the rolling unit 30 to move towards the inside of the pipe fitting 10 to the preset position, so that the rotating shaft 31 is eccentrically arranged with respect to the pipe fitting 10, the first roller 32 and the second roller 33 are located on the side of the rotating shaft 31 close to the axis of the pipe fitting 10, and the distance between the side of the rotating shaft 31 far from the axis of the pipe fitting 10 and the inner wall of the pipe fitting 10 can be less than the first height and the second height. By moving the rolling unit 30 to the preset eccentric position, the first roller 32 and the second roller 33 can contact the inner wall of the pipe fitting 10 and apply pressure when the rotating shaft 31 rotates, preparing for rolling ribbing; the design of the eccentric arrangement of the rotating shaft 31 and the distance less than the second height ensures that the first roller 32 and the second roller 33 can cut into the surface of the pipe fitting 10 to form an extrusion force, extruding to form the required rib structure.

[0040] Step S30, based on the rolling unit 30 being at the preset position, control the second driving unit to drive the rolling unit 30 to rotate around the axis of the arc-shaped groove 23. Through the rotating rolling unit 30, the first roller 32 and the second roller 33 roll the inner wall of the pipe fitting 10, thereby forming the required rib structure on the surface of the pipe fitting 10; the movement mode of rotating around the axis can ensure the uniformity and continuity of the ribbing, improving the ribbing quality.

[0041] Step S40, based on the rotation time of the rolling unit 30 reaching the preset time, control the third driving unit to drive the rolling unit 30 to disengage from the pipe fitting 10. By setting the rotation time, ensure the completion of the rolling process, so that after the ribbing reaches the predetermined depth and shape, it can be disengaged from the pipe fitting 10 in time, avoiding damage to the pipe fitting 10 caused by excessive rolling or affecting the production efficiency.

[0042] Step S50: Based on the fact that the rolling unit 30 disengages from the pipe fitting 10, control the first driving unit to drive the first clamping die 21 and the second clamping die 22 to move away from each other, and the rib forming is completed. After the rolling unit 30 disengages from the pipe fitting 10, control the first driving unit to move the first clamping die 21 and the second clamping die 22 away from each other, take out the pipe fitting 10 with the rib forming completed, and realize the automatic rib forming processing of the pipe fitting 10 by sequentially completing the steps of clamping, rolling, retracting, and loosening, thus completing the entire rib forming process; the orderly execution of each step ensures the coherence and high efficiency of the rib forming process.

[0043] In this embodiment, a second mounting hole 314 is formed on the rotating shaft 31; a third receiving groove 315 and a fourth receiving groove 316 are formed on the outer circumferential wall of the rotating shaft 31; the rolling unit 30 further includes a second mounting shaft; the second mounting shaft is located in the second mounting hole 314; the second mounting shaft is detachably connected to the rotating shaft 31; Step S20 may include Steps S21 to S25, and the above steps will be described in detail below: Step S21: Based on the completion of the clamping and positioning of the pipe fitting 10, obtain the usage status and usage duration of the rolling unit 30; wherein, the usage status includes a first status and a second status; in the first status, the first roller 32 is located in the first receiving groove 311, and the second roller 33 is located in the second receiving groove 312; in the second status, the first roller 32 is located in the third receiving groove 315, and the second roller 33 is located in the fourth receiving groove 316. By obtaining the usage status and usage duration of the rolling unit 30, the wear condition of the rolling unit 30 can be judged, providing a basis for whether to switch the status; clarifying the installation positions of the first roller 32 and the second roller 33 in the two usage statuses facilitates the status switch according to the actual situation, rationally utilizes the equipment structure, and prolongs the service life of the rolling unit 30.

[0044] Step S22: Based on the fact that the rolling unit 30 is in the first status and the usage duration is less than the first service life, execute Step S25. When the rolling unit 30 is in the first status (the first roller 32 is in the first receiving groove 311 and the second roller 33 is in the second receiving groove 312) and the usage duration is less than the first service life, directly execute the step of driving the rolling unit 30 to move to the preset position. By judging the relationship between the usage duration and the service life, when the rolling unit 30 has not reached the first service life, continue to use the first status for processing, make full use of the normal usage cycle of the equipment, and avoid affecting the production efficiency due to premature status switch.

[0045] Step S23: Based on the rolling unit 30 being in the first state and the usage duration being greater than the first service life, adjust the rolling unit 30 to the second state. When the rolling unit 30 is in the first state and the usage duration exceeds the first service life, adjust it to the second state (the first roller 32 is in the third receiving groove 315, and the second roller 33 is in the fourth receiving groove 316). By switching to the second state after the service life in the first state expires, and using different roller installation positions, avoid the influence of cantilever deformation caused by long-term use, thereby extending the overall service life of the rolling unit 30.

[0046] Step S24: Based on the rolling unit 30 switching to the second state, execute step S25. After the rolling unit 30 switches to the second state, execute the step of driving the rolling unit 30 to move to a preset position. By promptly executing subsequent operations, ensure the continuity of the rib rolling process after the state switch and guarantee the smooth progress of production; continue processing after the state switch, realizing the reasonable utilization of different installation positions of the rolling unit 30.

[0047] Step S25: Control the third driving unit to drive the rolling unit 30 to move towards the inside of the pipe fitting 10 until the rolling unit 30 moves to the preset position; wherein, in the state of the rolling unit 30 at the preset position, the rotating shaft 31 is eccentrically arranged with respect to the pipe fitting 10, and the first roller 32 and the second roller 33 are located on the side of the axis of the rotating shaft 31 closer to the axis of the pipe fitting 10, and the distance between the rotating shaft 31 and the inner wall of the pipe fitting 10 is less than the first height; the distance between the rotating shaft 31 and the inner wall of the pipe fitting 10 is less than the second height. Control the third driving unit to drive the rolling unit 30 to move to the preset eccentric position, so that both the first roller 32 and the second roller 33 can rotate through the rotating shaft 31 to contact the inner wall of the pipe fitting 10. By moving the rolling unit 30 to the preset position in different states, ensure that regardless of whether the first roller 32 and the second roller 33 are in the first state or the second state, the pipe fitting 10 can be accurately rolled to form ribs, guaranteeing the consistency of the processing technology; the eccentric setting and distance requirements of the rotating shaft 31 ensure that the rollers can effectively roll the pipe fitting 10 to form ribs that meet the requirements.

[0048] Step S40 may include: Step S41: Based on the rotation duration of the rolling unit 30 reaching the preset duration, control the third driving unit to drive the rolling unit 30 to disengage from the pipe fitting 10; and accumulate the preset duration as the usage duration of the rolling unit 30. When the rotation duration of the rolling unit 30 reaches the preset duration, control it to disengage from the pipe fitting 10 and accumulate this duration as the usage duration. By accumulating the usage duration, the working time of the rolling unit 30 can be accurately recorded, providing data support for judging its service life and state switch; the rolling unit 30 disengages from the pipe fitting 10 in a timely manner and accumulates the duration, ensuring the accuracy of the production process and the timeliness of equipment maintenance.

[0049] In this embodiment, step S24 may include: step S241, based on the rolling unit 30 switching to the second state and the usage duration being less than the second service life, execute step S25; wherein, the second service life is greater than the first service life. When the rolling unit 30 switches to the second state and the usage duration is less than the second service life, execute the step of driving the rolling unit 30 to move to a preset position. Since the second service life is greater than the first service life, by continuing to use it in the second state, the overall usage time of the rolling unit 30 is further extended, the replacement frequency is reduced, thereby extending the service life of the rolling unit 30 and reducing the production cost. In the case where the usage duration is greater than the first service life, the position of the rotating shaft 31 close to the first roller 32 undergoes flexural deformation. At this time, it is switched to the second state. Since the second mounting hole 314 is parallel to the axis of the rotating shaft 31, but the rotating shaft 31 has already undergone flexural deformation, the theoretical depth of rolling of the first roller 32 is deeper, and the extrusion force can be compensated so that the actual depths of rolling of the first roller 32 and the second roller 33 tend to be the same, thereby improving the consistency of double bead rolling.

[0050] In this embodiment, step S24 may also include: step S242, based on the rolling unit 30 switching to the second state and the usage duration being greater than the second service life, send a signal to replace the rolling unit 30. When the rolling unit 30 switches to the second state and the usage duration exceeds the second service life, send a replacement signal. By setting a service life threshold and sending a replacement signal, it is convenient to timely detect the excessive wear of the rolling unit 30, replace the rolling unit 30 in time, ensure the production qualification rate of the pipe fitting 10, and avoid the generation of unqualified products due to equipment wear.

[0051] It should be understood that the "this embodiment" mentioned in the present invention refers to the technical points described currently. Multiple "this embodiments" may be the same embodiment or different embodiments.

[0052] Those of ordinary skill in the art can understand that the above embodiments are specific cases for implementing the present disclosure, and in practical applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A cooling tube rib machine, characterized in that: The cooling tube rib machine comprises: A positioning unit, the positioning unit comprising a first clamping die and a second clamping die; the first clamping die and the second clamping die are both provided with an arc groove; the arc groove is used to accommodate a pipe fitting; the inner circumferential wall of the arc groove is provided with two arc-shaped avoidance grooves; the avoidance grooves are coaxial with the arc groove; a first driving unit, wherein the first driving unit drives the first clamping die and the second clamping die to move closer to or farther from each other; when the first clamping die and the second clamping die clamp the pipe fitting, the arc groove on the first clamping die is coaxial with the arc groove on the second clamping die; A rolling unit, the rolling unit comprising a rotating shaft, a first roller and a second roller; the first roller and the second roller are spaced apart along the axis of the rotating shaft; the distance between the first roller and the second roller is equal to the distance between the two avoidance grooves; a first accommodating groove and a second accommodating groove are provided on the outer circumferential wall of the rotating shaft; the first accommodating groove is used to accommodate the first roller; the second accommodating groove is used to accommodate the second roller; the first roller protrudes from the outer circumferential wall of the rotating shaft by a first height; the second roller protrudes from the outer circumferential wall of the rotating shaft by a second height; the first height is greater than the second height; a second driving unit, wherein the second driving unit drives the rotating shaft to rotate; a distance between the first roller and the second driving unit is greater than a distance between the second roller and the second driving unit; A third driving unit drives the rolling unit to move.

2. A cooling tube rib machine according to claim 1, characterized in that: The rolling unit further comprises a first mounting shaft; a first mounting hole is formed on the rotating shaft; the first mounting shaft is located in the first mounting hole; the first mounting shaft is detachably connected to the rotating shaft; the first receiving groove and the second receiving groove are respectively connected to the first mounting hole; When the first roller is located in the first accommodating groove and the second roller is located in the second accommodating groove, the first roller and the second roller are coaxially connected to the first mounting shaft respectively.

3. A cooling tube rib machine according to claim 2, characterized in that: The axis of the first mounting hole is parallel to the axis of the rotating shaft and is spaced apart from each other.

4. A cooling tube rib machine according to claim 2, characterized in that: The angle between the axis of the first mounting hole and the axis of the rotating shaft is greater than 0° and less than 5°, the axis of the first mounting hole and the axis of the rotating shaft are located in the same plane, and the axial distance between the first mounting hole and the rotating shaft gradually increases in the direction away from the second driving unit.

5. A cooling tube rib machine according to claim 2, characterized in that: A second mounting hole is provided on the rotating shaft; a third accommodating groove and a fourth accommodating groove are provided on the outer circumferential wall of the rotating shaft; the third accommodating groove and the fourth accommodating groove are spaced apart along the axis of the rotating shaft; the distance between the third accommodating groove and the second driving unit is greater than the distance between the fourth accommodating groove and the second driving unit; the third accommodating groove and the fourth accommodating groove are respectively connected to the second mounting hole; the distance between the third accommodating groove and the fourth accommodating groove is equal to the distance between the first accommodating groove and the second accommodating groove; the third accommodating groove is used to accommodate the first roller; the fourth accommodating groove is used to accommodate the second roller; The rolling unit further includes a second mounting shaft; the second mounting shaft is located in the second mounting hole; the second mounting shaft is detachably connected to the rotating shaft; When the first roller is located in the third accommodating groove and the second roller is located in the fourth accommodating groove, the first roller and the second roller are coaxially connected to the second mounting shaft respectively.

6. A cooling tube rib machine according to claim 5, characterized in that: The axis of the second mounting hole is parallel to the axis of the rotating shaft and has a spacing therebetween.

7. A method for cooling pipe ribs, applied to a cooling pipe rib machine according to any one of claims 1 to 6; characterized in that: The cooling pipe rib method comprises: Step S10, based on the pipe to be ribbed being located between the first clamping die and the second clamping die; controlling the first driving unit to drive the first clamping die and the second clamping die to approach each other until the pipe is clamped and positioned; wherein, when the pipe is clamped and positioned, the pipe is clamped in the arc grooves of the first clamping die and the second clamping die; Step S20, based on the completion of the clamping and positioning of the pipe fitting, controlling the third driving unit to drive the rolling unit to move toward the inside of the pipe fitting until the rolling unit moves to a preset position; wherein, when the rolling unit is in the preset position, the rotating shaft is eccentrically arranged with respect to the pipe fitting, the first roller and the second roller are located on the side of the axis of the rotating shaft close to the axis of the pipe fitting, and the distance between the rotating shaft and the inner wall of the pipe fitting is less than the first height; the distance between the rotating shaft and the inner wall of the pipe fitting is less than the second height; Step S30, based on the rolling unit being located at the preset position, controlling the second driving unit to drive the rolling unit to rotate around the axis of the arc groove; Step S40, based on the rotation time of the rolling unit reaching a preset time, controlling the third driving unit to drive the rolling unit to separate from the pipe; Step S50, based on the rolling unit being separated from the pipe, controlling the first driving unit to drive the first clamping die and the second clamping die to move away from each other, and the rib making is completed.

8. A method for cooling pipe ribs according to claim 7, characterized in that: The rotating shaft is provided with a second mounting hole; the outer circumferential wall of the rotating shaft is provided with a third receiving groove and a fourth receiving groove; the rolling unit further comprises a second mounting shaft; the second mounting shaft is located in the second mounting hole; the second mounting shaft is detachably connected to the rotating shaft; The step S20 comprises: Step S21, based on the completion of the clamping and positioning of the pipe fitting, obtaining the use state and use time of the rolling unit; wherein the use state includes a first state and a second state; in the first state, the first roller is located in the first receiving groove, and the second roller is located in the second receiving groove; in the second state, the first roller is located in the third receiving groove, and the second roller is located in the fourth receiving groove; Step S22: Based on the rolling unit being in the first state and the usage time being less than the first service life, executing step S25; Step S23, based on the rolling unit being in the first state and the usage time being greater than the first service life, adjusting the rolling unit to the second state; Step S24, based on the rolling unit switching to the second state, executing step S25; Step S25, controlling the third driving unit to drive the rolling unit to move toward the inside of the pipe until the rolling unit moves to a preset position; wherein, when the rolling unit is in the preset position, the rotating shaft is eccentrically arranged with respect to the pipe, the first roller and the second roller are located on a side of the axis of the rotating shaft close to the axis of the pipe, and the distance between the rotating shaft and the inner wall of the pipe is less than the first height; the distance between the rotating shaft and the inner wall of the pipe is less than the second height; The step S40 comprises: Step S41, based on the rotation time of the rolling unit reaching a preset time, controlling the third driving unit to drive the rolling unit to separate from the pipe; and accumulating the preset time as the usage time of the rolling unit.

9. A method for cooling pipe ribs according to claim 8, characterized in that: The step S24 comprises: Step S241, based on the rolling unit switching to the second state and the usage time being less than the second service life, executing step S25; wherein the second service life is greater than the first service life.

10. A method for cooling pipe ribs according to claim 9, characterized in that: The step S24 further comprises: Step S242: Based on the rolling unit switching to the second state and the usage time being greater than the second service life, a signal for replacing the rolling unit is issued.

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