A feeding mechanism and pipe forming equipment

Abstract

The application discloses a feeding mechanism and a pipe forming equipment, and relates to the technical field of pipe processing. The feeding mechanism comprises a mounting frame, a driving assembly, a sliding seat, an elastic piece, a mounting seat and a mandrel. The driving assembly is connected with the sliding seat, and the sliding seat and the mounting seat are both in sliding fit with the mounting frame. The sliding seat is provided with an abutting surface, and the mounting seat is provided with a matching surface. The abutting surface and the matching surface are arranged in close contact. The sliding seat is connected with the mounting seat through the elastic piece. The mandrel is installed on the mounting seat. The driving assembly is used for pushing the mounting seat to drive the mandrel to insert into a pipe blank along a first direction through the abutting surface of the sliding seat. The driving assembly is also used for driving the sliding seat to retreat along a second direction, so that the elastic piece is deformed, the abutting surface is separated from the matching surface, and the first direction is opposite to the second direction. The feeding mechanism provided by the application can guarantee feeding precision, prevent axial force acting on the mandrel from being transmitted to other components, avoid collision and damage between components, and is safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting processing technology, and more specifically, to a feeding mechanism and a pipe fitting forming equipment. Background Technology

[0002] Currently, in the expansion molding process of pipe fittings, a feeding mechanism is first used to feed the pipe blank so that it mates with the core tube of the feeding mechanism. Then, a feeding mechanism sends the pipe blank into the expansion molding mold through the feeding mechanism. High-pressure hot air is then introduced into the pipe blank through the core tube to cause it to expand and form the pipe fitting. To ensure the pipe blank enters the expansion molding mold accurately, the structural precision of the feeding and feeding mechanisms is generally improved, meaning the fit between the various components in these mechanisms is tighter. However, this results in the pipe blank being subjected to extreme pressure under the high-pressure hot air during the expansion molding process. This pressure is directly transmitted along the axial direction of the mandrel to other components of the feeding mechanism. Because the fit between the components in the feeding mechanism is tight, this can lead to high-intensity collisions between the components, affecting the feeding accuracy of the feeding mechanism and even causing damage to the feeding mechanism itself.

[0003] In view of this, it is particularly important to design and manufacture a feeding mechanism with high feeding accuracy and safety and reliability, as well as pipe forming equipment, especially in pipe processing. Summary of the Invention

[0004] The purpose of this invention is to provide a feeding mechanism that can ensure feeding accuracy while preventing the axial force acting on the mandrel from being transmitted to other components, avoiding collision damage between components, and ensuring safety and reliability.

[0005] Another objective of this invention is to provide a pipe forming device that can ensure feeding accuracy while preventing the axial force acting on the mandrel from being transmitted to other components, thus avoiding collision damage between components and ensuring safety and reliability.

[0006] The present invention is achieved by the following technical solution.

[0007] A feeding mechanism includes a mounting frame, a drive assembly, a sliding seat, an elastic element, a mounting base, and a mandrel. The drive assembly is mounted on the mounting frame and connected to the sliding seat. Both the sliding seat and the mounting base are slidably engaged with the mounting frame. The sliding seat has a supporting surface, and the mounting base has a mating surface. The supporting surface and the mating surface are fitted together. The sliding seat is connected to the mounting base via the elastic element. The mandrel is mounted on the mounting base. The drive assembly is used to push the mounting base along a first direction via the supporting surface of the sliding seat, thereby driving the mandrel to insert into the tube blank. The drive assembly is also used to drive the sliding seat back along a second direction, so that the elastic element deforms and the supporting surface and the mating surface separate. The first direction and the second direction are opposite.

[0008] Optionally, the drive assembly includes a drive motor, a lead screw, and a limit seat. The drive motor and the limit seat are spaced apart and are both connected to the mounting bracket. One end of the lead screw is connected to the drive motor for transmission, and the other end is rotatably engaged with the limit seat. The lead screw is threadedly engaged with the sliding seat. An elastic element is sleeved outside the lead screw and abuts against the sliding seat.

[0009] Optionally, the sliding seat includes a nut, a support frame, a first seat body, and a first slider. The mounting frame is provided with a slide rail. The nut is installed on the support frame and is threaded with a lead screw. The support frame is connected to the first seat body. The support surface is provided on one side of the support frame. The elastic element abuts against the other side of the support frame. The first slider is installed on the first seat body and slides with the slide rail.

[0010] Optionally, the abutment frame includes a base plate, reinforcing ribs, and a connecting plate. The connecting plate is connected to the base plate and is perpendicular to the base plate. The base plate is connected to the first seat body. The reinforcing ribs are connected to both the base plate and the connecting plate. The abutment surface is provided on the base plate. A nut is connected to the middle of the connecting plate. An elastic element abuts against the connecting plate.

[0011] Optionally, there are two first sliders and two slide rails. The two first sliders are arranged opposite each other on both sides of the support frame, and each first slider is slidably engaged with a slide rail.

[0012] Optionally, the mounting base includes a fixed frame, a positioning block, a second base body, and a second slider. The fixed frame is connected to the second base body, and the fixed frame has a through hole. The position of the through hole corresponds to the position of the nut. A lead screw passes through the through hole, and an elastic element abuts against the fixed frame. The positioning block is connected to the second base body, and a mating surface is provided on the positioning block. The second slider is mounted on the second base body and slides with the slide rail.

[0013] Optionally, there are two second sliders, which are spaced apart and both slide in cooperation with the slide rail, and the first slider is located between the two second sliders.

[0014] Optionally, the feeding mechanism also includes a ventilation mounting block, which is installed at the bottom of the mounting base and connected to the mandrel. The mandrel has an air inlet channel, and the ventilation mounting block has an air passage, which is connected to the air inlet channel.

[0015] Optionally, a limiting boss is provided on the circumferential surface of the mandrel, which is used to cooperate with the limiting groove of the expansion molding mold.

[0016] A pipe forming device includes an expansion forming mold, two feeding mechanisms, and two loading mechanisms. Each loading mechanism includes a mounting frame, a drive assembly, a sliding seat, an elastic element, a mounting base, and a mandrel. The drive assembly is mounted on the mounting frame and connected to the sliding seat. Both the sliding seat and the mounting base are slidably engaged with the mounting frame. The sliding seat has a supporting surface, and the mounting base has a mating surface. The supporting surface and the mating surface are fitted together. The sliding seat is connected to the mounting base via the elastic element. The mandrel is mounted on the mounting base. The drive assembly is used to push the mounting base along a first direction via the supporting surface of the sliding seat, thereby driving the mandrel to insert into the pipe blank. The drive assembly is also used to drive the sliding seat back along a second direction, so that the elastic element deforms and the supporting surface separates from the mating surface. The first direction and the second direction are opposite. The two drive assemblies are used to simultaneously drive the two mandrels to insert into both ends of the pipe blank. Each feeding mechanism is connected to a mounting frame. The feeding mechanism is used to feed the pipe blank into the expansion forming mold via the loading mechanism. The expansion forming mold is used to expand and form the pipe blank.

[0017] The feeding mechanism and pipe forming equipment provided by this invention have the following beneficial effects:

[0018] The feeding mechanism provided by this invention has a drive assembly mounted on a mounting frame and connected to a sliding seat. Both the sliding seat and the mounting seat are slidably engaged with the mounting frame. The sliding seat has a supporting surface, and the mounting seat has a mating surface. The supporting surface and the mating surface are fitted together. The sliding seat is connected to the mounting seat via an elastic element. A mandrel is mounted on the mounting seat. The drive assembly is used to push the mounting seat along a first direction via the supporting surface of the sliding seat, thereby inserting the mandrel into the tube blank. The drive assembly is also used to drive the sliding seat back along a second direction, causing the elastic element to deform and separating the supporting surface from the mating surface. The first direction and the second direction are opposite. Compared with the prior art, the feeding mechanism provided by this invention, due to the fitted supporting surface and the mating surface, and the sliding seat connected to the mounting seat via an elastic element, can ensure feeding accuracy while preventing the axial force acting on the mandrel from being transmitted to other components, avoiding collision damage between components, and ensuring safety and reliability.

[0019] The pipe forming equipment provided by the present invention includes a feeding mechanism, which can ensure feeding accuracy while preventing the axial force acting on the mandrel from being transmitted to other parts, avoiding collision damage between parts, and ensuring safety and reliability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the pipe forming equipment provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the pipe forming equipment provided in an embodiment of the present invention during the feeding of pipe blanks;

[0023] Figure 3 This is a schematic diagram of the pipe forming equipment provided in an embodiment of the present invention when bending a pipe blank;

[0024] Figure 4 This is a schematic diagram of the pipe forming equipment provided in an embodiment of the present invention during the feeding of the pipe blank;

[0025] Figure 5 This is a schematic diagram of the pipe forming equipment provided in an embodiment of the present invention during the expansion forming of a pipe blank.

[0026] Figure 6 This is a schematic diagram of the connection between the feeding mechanism and the bending mechanism provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the feeding mechanism provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the feeding mechanism provided in the embodiment of the present invention, in which the sliding seat is connected to the mounting seat through an elastic element;

[0029] Figure 9 This is a cross-sectional view of the feeding mechanism provided in an embodiment of the present invention during the feeding of a tube blank;

[0030] Figure 10 A cross-sectional view of the feeding mechanism provided in an embodiment of the present invention during the expansion forming of a tube blank;

[0031] Figure 11 A cross-sectional view of the mandrel and the expansion molding die in the feeding mechanism provided in an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of the lower template of the expansion molding die in the pipe forming equipment provided in an embodiment of the present invention.

[0033] Icons: 10-Pipe forming equipment; 100-Feeding mechanism; 110-Mounting frame; 111-Slide rail; 112-First limiting block; 113-Second limiting block; 120-Drive assembly; 121-Drive motor; 122-Screw; 123-Limit seat; 130-Sliding seat; 131-Abutting surface; 132-Nut; 133-Abutting frame; 134-First seat; 135-First slider; 136-Base plate; 137-Reinforcing rib; 138-Connecting plate; 140-Elastic element; 150-Mounting seat; 151-Mating surface; 152-Fixing frame; 153-Positioning block; 154-Second seat; 155-Second slider; 156-Through Hole; 160-Ventilation mounting block; 161-Ventilation channel; 170-Mandrel; 171-Inlet channel; 172-Limiting boss; 173-Limiting surface; 174-Insertion section; 200-Frame; 300-Expansion forming mold; 310-Limiting groove; 311-Inner sidewall; 320-Forming drive component; 330-Upper template; 340-Lower template; 341-Second insert; 342-Second semi-circular groove; 400-Feeding mechanism; 410-Lifting drive component; 420-Lifting frame; 430-Translation drive component; 440-Bearing frame; 500-Bending mechanism; 510-Bending rail; 520-Sliding frame; 530-Sliding drive component; 20-Tube blank. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0036] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0037] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, features in the following embodiments can be combined with each other.

[0040] Please refer to the reference. Figures 1 to 5 This invention provides a pipe forming device 10 for producing and processing pipe fittings. It can ensure feeding accuracy while preventing the axial force acting on the mandrel 170 from being transmitted to other components, avoiding collisions and damage between components, thus ensuring safety and reliability.

[0041] In this embodiment, the tube blank 20 is cylindrical, and the fitting is bent. The fitting forming equipment 10 can bend the tube blank 20, which has reached a certain temperature after preheating, and then mold it to cause the tube blank 20 to undergo molecular directional expansion, ultimately obtaining a bent fitting. However, it is not limited to this. In other embodiments, both the tube blank 20 and the fitting are cylindrical. In this case, the fitting forming equipment 10 can directly mold the tube blank 20 to cause the tube blank 20 to undergo molecular directional expansion, obtaining a cylindrical fitting.

[0042] The pipe forming equipment 10 includes a frame 200, an expansion forming mold 300, two feeding mechanisms 400, two bending mechanisms 500, and two loading mechanisms 100. The expansion forming mold 300 and the two bending mechanisms 500 are all mounted on the frame 200. Each bending mechanism 500 is connected to one feeding mechanism 400, and each feeding mechanism 400 is connected to one loading mechanism 100. The two loading mechanisms 100 simultaneously feed both ends of the pipe blank 20 to facilitate subsequent bending and movement of the pipe blank 20. The two bending mechanisms 500 simultaneously move both ends of the pipe blank 20 to cause bending. The feeding mechanisms 400 feed the bent pipe blank 20 into the expansion forming mold 300 via the loading mechanisms 100. The expansion forming mold 300 performs expansion forming on the pipe blank 20.

[0043] Please refer to the reference. Figures 6 to 11 The feeding mechanism 100 includes a mounting frame 110, a drive assembly 120, a sliding seat 130, an elastic element 140, a mounting base 150, a ventilated mounting block 160, and a spindle 170. The drive assembly 120 is mounted on the mounting frame 110 and connected to the sliding seat 130, and the drive assembly 120 can drive the sliding seat 130 to move. Both the sliding seat 130 and the mounting base 150 are slidably engaged with the mounting frame 110. The sliding seat 130 is provided with a supporting surface 131, and the mounting base 150 is provided with a mating surface 151. The supporting surface 131 and the mating surface 151 are fitted together, and the sliding seat 130 can drive the mounting base 150 to move through the engagement of the supporting surface 131 and the mating surface 151. The sliding seat 130 is connected to the mounting seat 150 via the elastic element 140. The mandrel 170 is mounted on the mounting seat 150. The drive assembly 120 is used to push the mounting seat 150 along the first direction via the abutment surface 131 of the sliding seat 130 to insert the mandrel 170 into the tube blank 20, so as to realize the feeding of the tube blank 20 with high feeding accuracy. The drive assembly 120 is also used to drive the sliding seat 130 to retract along the second direction. The first direction is opposite to the second direction, so that the elastic element 140 deforms and the abutment surface 131 separates from the mating surface 151. This prevents the axial force acting on the mandrel 170 during the expansion molding of the tube blank 20 from being transmitted to the sliding seat 130 and the drive assembly 120 through the mounting seat 150, thereby avoiding damage to the drive assembly 120. This ensures safety and reliability.

[0044] It should be noted that the venting mounting block 160 is installed at the bottom of the mounting base 150 and connected to the mandrel 170. The mandrel 170 has an air inlet channel 171, and the extension direction of the air inlet channel 171 is the same as the axial direction of the mandrel 170. The venting mounting block 160 has an air passage 161, which is connected to the air inlet channel 171, so that high-pressure hot air can be injected into the expansion molding mold 300 in sequence through the air passage 161 and the air inlet channel 171, thereby realizing the expansion molding of the tube blank 20.

[0045] Furthermore, a limiting boss 172 is provided on the circumferential surface of the mandrel 170. The limiting boss 172 is used to cooperate with the limiting groove 310 of the expansion molding mold 300. The limiting groove 310 can limit the limiting boss 172 to prevent the mandrel 170 from being squeezed out of the expansion molding mold 300 during the expansion molding process of the tube blank 20. This prevents the mounting seat 150 connected to the mandrel 170 from moving along the second direction with the sliding seat 130 when the drive assembly 120 drives the sliding seat 130 to retract. This ensures that the abutting surface 131 can be separated from the mating surface 151, thereby ensuring that all the axial force acting on the mandrel 170 is transmitted to the expansion molding mold 300 without affecting the drive assembly 120.

[0046] It is worth noting that a limiting surface 173 is provided on the side of the limiting boss 172 near the mounting base 150. The inner wall 311 of the limiting groove 310 can stop the limiting surface 173 to prevent the mandrel 170 from being squeezed out of the expansion molding mold 300 during the expansion molding process of the tube blank 20. During the expansion forming process of the tube blank 20, if the limiting boss 172 and the limiting groove 310 are tightly fitted, that is, the limiting surface 173 is always in contact with the inner sidewall 311, then when the drive assembly 120 drives the sliding seat 130 to retract in the second direction, the mandrel 170 and the mounting seat 150 remain stationary, the abutting surface 131 separates from the mating surface 151, and the retraction distance of the sliding seat 130 is the distance between the abutting surface 131 and the mating surface 151, which is the deformation of the elastic element 140. At this time, the axial force acting on the mandrel 170 is fully transmitted to the expansion forming mold 300 through the fit between the limiting boss 172 and the limiting groove 310; if the limiting boss 172 and the limiting groove 310 are loosely fitted, that is, the limiting surface 173 and the inner sidewall 311 are spaced apart, the distance between the limiting surface 173 and the inner sidewall 311 is... When a preset distance is formed, when the drive assembly 120 drives the sliding seat 130 to retract along the second direction, the sliding seat 130 first drives the mounting seat 150 and the spindle 170 to move a preset distance along the second direction through the elastic element 140. After that, the limiting surface 173 is fitted with the inner sidewall 311, the mounting seat 150 and the spindle 170 no longer move, and the sliding seat 130 continues to retract along the second direction so that the abutting surface 131 and the mating surface 151 are separated. The retraction distance of the sliding seat 130 is equal to the preset distance plus the distance between the abutting surface 131 and the mating surface 151, that is, the retraction distance of the sliding seat 130 is equal to the preset distance plus the deformation of the elastic element 140. At this time, the axial force acting on the spindle 170 is fully transmitted to the expansion molding mold 300 through the cooperation of the limiting boss 172 and the limiting groove 310.

[0047] Specifically, there are two feeding mechanisms 100, namely, two mounting brackets 110, two drive components 120, two sliding seats 130, two elastic elements 140, two mounting seats 150, two ventilated mounting blocks 160, and two mandrels 170. The two mandrels 170 are coaxial and spaced apart. The two drive components 120 are used to synchronously drive the two mandrels 170 to move closer to each other (the drive components 120 push the mounting seats 150 to move through the sliding seats 130), so that the two mandrels 170 are inserted into both ends of the tube blank 20 at the same time, thereby realizing the feeding of the tube blank 20. During this process, since the abutment surface 131 and the mating surface 151 are in close contact, the transmission is reliable, so the length of the mandrel 170 inserted into the tube blank 20 can be precisely controlled, and the feeding accuracy is high. Afterwards, the mandrel 170 supports and positions the tube blank 20 from the inside, so as to facilitate the subsequent bending or movement of the tube blank 20.

[0048] In this embodiment, the free end of the mandrel 170 (the end of the mandrel 170 away from the mounting base 150) is provided with an insertion section 174. The outer diameter of the insertion section 174 is less than or equal to the inner diameter of the tube blank 20, so as to facilitate the insertion of the insertion section 174 into the tube blank 20. Specifically, a limiting boss 172 is provided at the end of the insertion section 174 near the mounting base 150. The limiting boss 172 is used to stop the tube blank 20 to ensure that the length of the mandrel 170 inserted into the tube blank 20 is the length of the insertion section 174. During the feeding process of the tube blank 20, the tube blank 20 is first suspended between two mandrels 170 and the tube blank 20 is coaxial with the two mandrels 170. Then, the two drive components 120 are used to drive the two mandrels 170 to move closer to each other, so that the two insertion sections 174 are inserted into the two ends of the tube blank 20 respectively. When the tube blank 20 abuts against the limiting boss 172, the feeding of the tube blank 20 is completed. At this time, the tube blank 20 is clamped between the two limiting bosses 172 to fix the relative position of the tube blank 20 and the two feeding mechanisms 100, so as to ensure the feeding accuracy.

[0049] The drive assembly 120 includes a drive motor 121, a lead screw 122, and a limiting seat 123. The drive motor 121 and the limiting seat 123 are spaced apart and both are connected to the mounting bracket 110. One end of the lead screw 122 is connected to the drive motor 121 for transmission, and the other end is rotatably engaged with the limiting seat 123. The limiting seat 123 limits the lead screw 122 to ensure its coaxiality. The lead screw 122 is threaded into a sliding seat 130. An elastic element 140 is sleeved on the lead screw 122 and abuts against the sliding seat 130. The drive motor 121 drives the lead screw 122 to rotate, causing the sliding seat 130 to translate along the axial direction of the lead screw 122. The lead screw 122 limits the extension and retraction direction of the elastic element 140, ensuring that the elastic element 140 can only apply elastic force to the sliding seat 130 along the axial direction of the lead screw 122.

[0050] In this embodiment, the elastic element 140 is a spring, but it is not limited to this. In other embodiments, the elastic element 140 may also be a rubber sleeve or a silicone sleeve. The material of the elastic element 140 is not specifically limited.

[0051] The sliding seat 130 includes a nut 132, a support frame 133, a first seat body 134, and a first slider 135. The mounting frame 110 is provided with a slide rail 111. The nut 132 is mounted on the support frame 133 and threadedly engaged with the lead screw 122. The support frame 133 is connected to the first seat body 134. The nut 132 can translate along the axial direction of the lead screw 122 during rotation, thereby driving the support frame 133 and the first seat body 134 to move. The abutment surface 131 is provided on one side of the support frame 133, and the elastic member 140 abuts against the other side of the support frame 133. The elastic member 140 is always in a compressed state. The support frame 133 can push the mounting seat 150 to move through the abutment surface 131. The support frame 133 can also apply pressure to the elastic member 140 to overcome the elastic force of the elastic member 140 and cause the elastic member 140 to deform. The first slider 135 is mounted on the first base 134 and slides in cooperation with the slide rail 111. The first base 134 can drive the first slider 135 to slide relative to the slide rail 111. The slide rail 111 can limit and guide the first slider 135, thereby limiting the sliding direction of the entire sliding base 130.

[0052] The support frame 133 includes a base plate 136, a reinforcing rib 137, and a connecting plate 138. The connecting plate 138 is connected to the base plate 136 and is perpendicular to the base plate 136. The base plate 136 is connected to the first seat 134. The reinforcing rib 137 is connected to both the base plate 136 and the connecting plate 138, and the reinforcing rib 137 is used to improve the connection strength between the base plate 136 and the connecting plate 138. The abutment surface 131 is provided on the base plate 136, and the base plate 136 can push the mounting seat 150 to move through the abutment surface 131. The nut 132 is connected to the middle of the connecting plate 138 to improve the uniformity of the force on the connecting plate 138. The elastic member 140 abuts against the connecting plate 138, and the connecting plate 138 can apply pressure to the elastic member 140 to cause the elastic member 140 to deform.

[0053] In this embodiment, there are two first sliders 135 and two slide rails 111. The two first sliders 135 are arranged opposite to each other on both sides of the support frame 133 and are connected to the first seat 134. Each first slider 135 slides with one slide rail 111. The two first sliders 135 work together to improve the stability of the sliding seat 130 during the sliding process.

[0054] Mounting base 150 includes a fixing frame 152, a positioning block 153, a second seat body 154, and a second slider 155. The fixing frame 152 is connected to the second seat body 154. The fixing frame 152 has a through hole 156, the position of which corresponds to the position of the nut 132. A lead screw 122 passes through the through hole 156 and is threadedly engaged with the nut 132. An elastic element 140 abuts against the fixing frame 152, i.e., the elastic element 140 is clamped between the fixing frame 152 and the abutment frame 133. The positioning block 153 is connected to the second seat body 154, and a mating surface 151 is provided on the positioning block 153. The abutment frame 133 can push the second seat body 154 to move through the positioning block 153. The second slider 155 is mounted on the second base 154 and slides in cooperation with the slide rail 111. The second base 154 can drive the second slider 155 to slide relative to the slide rail 111. The slide rail 111 can limit and guide the second slider 155, thereby limiting the sliding direction of the entire mounting base 150.

[0055] In this embodiment, there are four second sliders 155, all of which are connected to the second base 154. The four second sliders 155 are divided into two groups, with two sliders 155 in each group. Each group of two sliders 155 slides into a slide rail 111. Specifically, the two second sliders 155 in each group are spaced apart and slide into a slide rail 111. The first slider 135 is positioned between the two second sliders 155 in each group. The two second sliders 155 in each group can limit the first slider 135 to prevent the sliding base 130 from detaching from the mounting base 150. The four second sliders 155 work together to improve the stability of the mounting base 150 during the sliding process.

[0056] In this embodiment, a first limiting block 112 and a second limiting block 113 are provided at both ends of the slide rail 111. The first limiting block 112 and the second limiting block 113 are both used to abut against the second slider 155 to limit the extreme position of the second slider 155 relative to the slide rail 111, thereby limiting the extreme position of the mounting seat 150 relative to the slide rail 111 and preventing the mounting seat 150 from disengaging from the slide rail 111.

[0057] Please continue to refer to Figures 2 to 6The bending mechanism 500 includes a bending rail 510, a sliding frame 520, and a sliding drive component 530. The bending rail 510 is mounted on the frame 200, and the sliding frame 520 is slidably engaged with the bending rail 510. The sliding frame 520 can move along the extension direction of the bending rail 510, and the bending rail 510 can guide and limit the sliding frame 520. The sliding drive component 530 is mounted on the sliding frame 520 and can generate a driving force on the sliding frame 520 through a gear and rack transmission, so that the sliding frame 520 moves relative to the bending rail 510. The feeding mechanism 400 is mounted on the sliding frame 520 and connected to the mounting frame 110. The bending mechanism 500 can drive the mounting frame 110 to move through the feeding mechanism 400, thereby driving the entire feeding mechanism 100 to move, and then bending the tube blank 20 through the mandrel 170.

[0058] Specifically, there are two bending mechanisms 500, namely, two bending rails 510, two sliding frames 520 and two sliding drive components 530. The two sliding drive components 530 are used to synchronously drive the two sliding frames 520 to slide relative to the two bending rails 510 respectively, so that a preset angle is formed between the two mandrels 170, thereby bending the tube blank 20.

[0059] In this embodiment, the curved rail 510 is arc-shaped. The two curved rails 510 have the same shape and size. The two curved rails 510 are spaced apart and together form an arc. That is, the arc and curvature of the two curved rails 510 are the same, so as to ensure the synchronicity of the movement of the two bending mechanisms 500, improve the uniformity of the force applied by the two mandrels 170 to both ends of the tube blank 20, and thus improve the bending stability of the tube blank 20.

[0060] The feeding mechanism 400 includes a lifting drive 410, a lifting frame 420, a translation drive 430, and a support frame 440. The lifting drive 410 is mounted on the sliding frame 520 and connected to the lifting frame 420. The mounting frame 110 is connected to the lifting frame 420. The lifting drive 410 is used to drive the mounting frame 110 to rise or fall along a third direction via the lifting frame 420, thereby driving the entire feeding mechanism 100 to rise or fall along a third direction, which is perpendicular to the axis of the mandrel 170. Specifically, the lifting drive 410 can drive the mandrel 170 to rise or fall along a third direction to adjust the height of the mandrel 170, thereby facilitating the feeding of the tube blank 20 at different heights and facilitating the feeding of the tube blank 20.

[0061] Furthermore, the translation drive 430 is mounted on the frame 200 and connected to the support frame 440. The curved rail 510 is mounted on the support frame 440. The translation drive 430 is used to drive the curved rail 510 to move along the fourth direction through the support frame 440, thereby driving the entire feeding mechanism 100 to move along the fourth direction, which is perpendicular to the axis of the mandrel 170. Specifically, the translation drive 430 can drive the sliding frame 520 and the entire feeding mechanism 100 to move along the fourth direction through the curved rail 510 to adjust the position of the mandrel 170, thereby facilitating the feeding of the tube blank 20 at different positions and facilitating the feeding of the tube blank 20.

[0062] Specifically, there are two feeding mechanisms 400, namely, two lifting drive components 410, two lifting frames 420, two translation drive components 430, and two support frames 440. The two lifting drive components 410 are used to synchronously drive the two lifting frames 420 to lift, and the two translation drive components 430 are used to synchronously drive the two support frames 440 to move. The two lifting drive components 410 and the two translation drive components 430 work together to drive the feeding mechanism 100 to move smoothly, thereby improving the stability of the tube blank 20 feeding.

[0063] In this embodiment, the axial, third, and fourth directions of the mandrel 170 are perpendicular to each other, with the third direction being vertical. Both the axial and fourth directions of the mandrel 170 are located on a horizontal plane. The translation drive 430 can sequentially drive the mandrel 170 to move along the fourth direction via the support frame 440, curved rail 510, sliding frame 520, lifting drive 410, lifting frame 420, mounting frame 110, and drive assembly 120. The lifting drive 410 can sequentially drive the mandrel 170 to move up and down along the third direction via the lifting frame 420, mounting frame 110, and drive assembly 120. The drive assembly 120 can drive the mandrel 170 to move along its axial direction. The translation drive 430, lifting drive 410, and drive assembly 120 work together to enable the mandrel 170 to move to any position in the three-dimensional spatial coordinate system, thereby improving the feeding accuracy of the tube blank 20.

[0064] The expansion molding die 300 includes a molding drive 320, an upper mold plate 330, and a lower mold plate 340. Both the molding drive 320 and the lower mold plate 340 are mounted on the frame 200. The molding drive 320 is connected to the upper mold plate 330, which is positioned parallel to and spaced above the lower mold plate 340. The molding drive 320 is used to lower the upper mold plate 330 to close with the lower mold plate 340, and continuously applies a closing force to the upper mold plate 330 during the product molding process to ensure that the upper mold plate 330 and the lower mold plate 340 are always in a tightly closed state. The molding drive 320 is also used to raise the upper mold plate 330 to open the mold.

[0065] Please refer to the reference. Figure 11 and Figure 12 In this embodiment, the upper template 330 is provided with a first insert (not shown), and the lower template 340 is provided with a second insert 341. The first insert and the second insert 341 together form a cavity when the mold is closed, so as to form the tube blank 20 into a tube fitting. Further, the first insert has a first semi-circular groove (not shown), and the second insert 341 has a second semi-circular groove 342. The first semi-circular groove and the second semi-circular groove 342 together form a limiting groove 310 when the mold is closed. Specifically, there are two first semi-circular grooves, which are arranged opposite to each other at both ends of the first insert; there are two second semi-circular grooves 342, which are arranged opposite to each other at both ends of the second insert 341; the two first semi-circular grooves and the two second semi-circular grooves 342 together form two limiting grooves 310 when the mold is closed, and the two limiting grooves 310 are arranged opposite to each other at both ends of the cavity.

[0066] In this embodiment, the lifting drive 410 and the translation drive 430 are both electric cylinders, and the sliding drive 530 is a motor. However, this is not the only embodiment. In other embodiments, the lifting drive 410 and the translation drive 430 may also be hydraulic cylinders or pneumatic cylinders, and the sliding drive 530 may also be a pneumatic motor or a hydraulic motor. The types of the lifting drive 410, the translation drive 430, and the sliding drive 530 are not specifically limited.

[0067] It is worth noting that during the operation of the pipe forming equipment 10, the preheated pipe blank 20 is first fed between two mandrels 170 using a robotic arm, and the pipe blank 20 is coaxially positioned with the two mandrels 170. Then, two drive assemblies 120 drive the two mandrels 170 to simultaneously insert into both ends of the pipe blank 20. Next, two sliding drive components 530 drive the two sliding frames 520 to simultaneously slide along the extension direction of the two curved rails 510. During this process, the angle between the two mandrels 170 continuously changes to continuously bend the pipe blank 20. When the two sliding frames 520... When both mandrels 170 move to the preset position, the angle between them reaches the preset angle, at which point the bending action of the tube blank 20 is completed. Then, the lifting drive 410 drives the mandrel 170 to move up and down in the third direction, and the translation drive 430 drives the mandrel 170 to move in the fourth direction, so that the tube blank 20 is partially placed in the second insert 341 of the lower template 340, and the limiting boss 172 of the mandrel 170 engages with the second semi-circular groove 342. Next, the forming drive 320 drives the upper template 330 to descend and close with the lower mold base, so that the tube blank 20 is completely located in the cavity. The limiting boss 172 of the mandrel 170 engages with the limiting groove 310; then, the drive assembly 120 drives the sliding seat 130 to retract in the second direction, compressing the elastic element 140 and separating the abutting surface 131 from the mating surface 151. At this time, the limiting surface 173 of the limiting boss 172 is fitted against the inner sidewall 311 of the limiting groove 310; then, high-pressure hot air is sequentially introduced into the tube blank 20 through the air passage 161 of the venting mounting block 160 and the air inlet passage 171 of the mandrel 170, so that the tube blank 20 undergoes molecular directional expansion under the action of high-pressure hot air and adheres to the... During this process, because the supporting surface 131 separates from the mating surface 151 and the limiting surface 173 is fitted with the inner sidewall 311, the axial force acting on the mandrel 170 is entirely transmitted to the expansion molding mold 300 without affecting the accuracy of the drive assembly 120. Then, pressure holding and cooling are performed to complete the forming operation of the tube. Finally, the forming drive 320 is used to drive the upper template 330 to rise and open the mold, and the translation drive 430 and the lifting drive 410 are used to drive the mandrel 170 to move, so as to realize the discharge of the tube and transfer the tube to the next station.

[0068] The feeding mechanism 100 provided in this embodiment of the invention has a drive assembly 120 mounted on a mounting frame 110 and connected to a sliding seat 130. Both the sliding seat 130 and the mounting seat 150 are slidably engaged with the mounting frame 110. The sliding seat 130 is provided with a bearing surface 131, and the mounting seat 150 is provided with a mating surface 151. The bearing surface 131 and the mating surface 151 are fitted together. The sliding seat 130 is connected to the mounting seat 150 through an elastic member 140. A mandrel 170 is mounted on the mounting seat 150. The drive assembly 120 is used to push the mounting seat 150 along a first direction through the bearing surface 131 of the sliding seat 130 to drive the mandrel 170 to insert into the tube blank 20. The drive assembly 120 is also used to drive the sliding seat 130 back along a second direction, so that the elastic member 140 deforms and the bearing surface 131 separates from the mating surface 151. The first direction and the second direction are opposite. Compared with the prior art, the feeding mechanism 100 provided by the present invention, due to the use of a support surface 131 and a mating surface 151 that fit together, and a sliding seat 130 connected to the mounting seat 150 through an elastic element 140, can ensure feeding accuracy while preventing the axial force acting on the mandrel 170 from being transmitted to other components, avoiding collision damage between components, and ensuring safety and reliability. This results in high product quality and strong safety in the pipe forming equipment 10.

[0069] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A feeding mechanism, characterized in that, The device includes a mounting bracket, a drive assembly, a sliding seat, an elastic element, a mounting base, and a mandrel. The drive assembly is mounted on the mounting bracket and connected to the sliding seat. Both the sliding seat and the mounting base are slidably engaged with the mounting bracket. The sliding seat has a supporting surface, and the mounting base has a mating surface. The supporting surface and the mating surface are in close contact. The sliding seat is connected to the mounting base via the elastic element. The mandrel is mounted on the mounting base. The drive assembly is used to push the mounting base along a first direction via the supporting surface of the sliding seat, thereby driving the mandrel to insert into the tube blank. The drive assembly is also used to drive the sliding seat back along a second direction, so that the elastic element deforms and the supporting surface separates from the mating surface. The first direction is opposite to the second direction. The drive assembly includes a drive motor, a lead screw, and a limiting seat. The drive motor and the limiting seat are spaced apart and both are connected to the mounting bracket. One end of the lead screw is driven by the drive motor, and the other end is rotatably engaged with the limiting seat. The lead screw is threadedly engaged with the sliding seat. The elastic element is sleeved outside the lead screw and abuts against the sliding seat. The sliding seat includes a nut, a support frame, a first seat body, and a first slider. The mounting frame is provided with a slide rail. The nut is installed on the support frame and threadedly engaged with the lead screw. The support frame is connected to the first seat body. The support surface is provided on one side of the support frame. The elastic element abuts against the other side of the support frame. The first slider is installed on the first seat body and slides in cooperation with the slide rail.

2. The feeding mechanism according to claim 1, characterized in that, The abutment frame includes a base plate, reinforcing ribs, and a connecting plate. The connecting plate is connected to the base plate and is perpendicular to the base plate. The base plate is connected to the first seat body. The reinforcing ribs are connected to both the base plate and the connecting plate. The abutment surface is provided on the base plate. The nut is connected to the middle of the connecting plate. The elastic element abuts against the connecting plate.

3. The feeding mechanism according to claim 1, characterized in that, There are two first sliders and two slide rails. The two first sliders are arranged opposite each other on both sides of the support frame, and each first slider is slidably engaged with one of the slide rails.

4. The feeding mechanism according to claim 1, characterized in that, The mounting base includes a fixing frame, a positioning block, a second base body, and a second slider. The fixing frame is connected to the second base body. The fixing frame has a through hole, the position of which corresponds to the position of the nut. The lead screw passes through the through hole. The elastic element abuts against the fixing frame. The positioning block is connected to the second base body. The mating surface is provided on the positioning block. The second slider is mounted on the second base body and slides in cooperation with the slide rail.

5. The feeding mechanism according to claim 4, characterized in that, There are two second sliders, which are spaced apart and both slide in cooperation with the slide rail. The first slider is located between the two second sliders.

6. The feeding mechanism according to claim 1, characterized in that, The feeding mechanism also includes a ventilation mounting block, which is installed at the bottom of the mounting base and connected to the mandrel. The mandrel has an air inlet channel, and the ventilation mounting block has an air passage, which is connected to the air inlet channel.

7. The feeding mechanism according to claim 1, characterized in that, A limiting boss is provided on the circumferential surface of the mandrel, which is used to cooperate with the limiting groove of the expansion molding mold.

8. A pipe fitting forming equipment, characterized in that, The device includes an expansion molding die, two feeding mechanisms, and two loading mechanisms as described in any one of claims 1 to 7. The two driving components are used to synchronously drive the two mandrels to be inserted into both ends of the tube blank. Each feeding mechanism is connected to a mounting bracket. The feeding mechanism is used to feed the tube blank into the expansion molding die through the loading mechanism. The expansion molding die is used to expand and mold the tube blank.

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