One-step forming precision pipe bending machine for inner exhaust pipe

Abstract

The utility model relates to the technical field of pipe bending machines, and discloses an inner exhaust pipe one-time forming precision pipe bending machine which comprises a machining rack and an inner exhaust pipe body, a bending die is installed on the top of the machining rack, a receding groove for containing the head end of the inner exhaust pipe body is formed in the bending die, and the inner exhaust pipe body is arranged in the receding groove. A positioning assembly capable of clamping and limiting the head end structure of the inner exhaust pipe body is arranged above the receding groove, and a seventh bent position, a first bent position, a second bent position, a third bent position, a fourth bent position, a fifth bent position and a sixth bent position are arranged on the surface of the bending mold in the circumferential direction of the bending mold. A fifth air cylinder bending assembly is arranged above the space where the seventh bending position is located. According to the one-time forming precision pipe bending machine, in the follow-up inner exhaust pipe body machining process, the pipe bending action is conducted at the low-altitude position of the top of the machining rack as much as possible, the space utilization rate is high, and equipment is compact.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending machine technology, specifically a precision pipe bending machine for one-time forming of internal exhaust pipe. Background Technology

[0002] Existing pipe bending machines can generally be divided into CNC pipe bending machines, hydraulic pipe bending machines, etc., and are mainly used for pipeline laying and repair in power construction, railway and highway construction, boilers, bridges, ships, furniture, decoration, etc. They have the advantages of multiple functions, reasonable structure and simple operation.

[0003] However, most pipe bending machines are designed to meet the needs of automatic bending in the same direction. When faced with internal exhaust pipes with small diameters and complex structures, they cannot meet the bending needs of different angles on multiple horizontal planes of the internal exhaust pipe. According to common sense, it may be possible to meet the substrate forming requirements by automatically bending one part of the structure and then manually adjusting the workpiece, but the work efficiency and safety during the operation are difficult to guarantee. Therefore, in view of the technical problems existing in the prior art, this application will provide a pipe bending machine for one-time forming of internal exhaust pipes to solve the problem. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a precision pipe bending machine for one-time forming of internal exhaust pipes, which solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a precision pipe bending machine for one-time forming of an internal exhaust pipe, including a processing frame and an internal exhaust pipe body. A bending mold is installed on the top of the processing frame. The interior of the bending mold is provided with a relief groove to accommodate the head end of the internal exhaust pipe body. A positioning component capable of clamping and limiting the structure of the head end of the internal exhaust pipe body is provided above the relief groove. The surface of the bending mold is provided with a seventh bend, a first bend, a second bend, a third bend, a fourth bend, a fifth bend, and a sixth bend along its circumference.

[0006] A fifth cylinder bending assembly is provided above the space where the seventh bend is located. Rotary bending assemblies aligned with their own positions are provided on the outside of the first bend, the second bend, and the fifth bend. A first movable mold assembly, a second movable mold assembly, and a positioning mold head are respectively provided inside the third bend, the fourth bend, and the sixth bend. A first cylinder bending assembly that cooperates with its own bending processing is provided on the outside of the first movable mold assembly, and a second cylinder bending assembly that cooperates with its own bending processing is provided on the outside of the second movable mold assembly.

[0007] The outer side of the positioning mold head is provided with a third cylinder bending assembly and a fourth cylinder bending assembly that cooperate with its own bending processing, and the relative movement adjustment between the fourth cylinder bending assembly and the positioning mold head can clamp and limit the tail end of the internal exhaust pipe body.

[0008] The preferred positioning component includes a positioning transmission component and a muffler block. The positioning transmission component includes a positioning cylinder and a first transmission plate. The output end of the positioning cylinder is connected to the first transmission plate. A support frame fixed to the top of the processing machine frame is installed on the housing surface of the positioning cylinder. The muffler block can clamp and limit the head end of the internal exhaust pipe body by engaging with the bending die under the transmission of the positioning cylinder through the first transmission plate.

[0009] Specifically, the rotary bending assembly includes a frame plate installed on the top of the processing frame. A transmission gear is fitted inside the frame plate. The transmission gear is provided with a spline groove and a cross shaft is engaged with the spline groove. One end of the cross shaft is drivenly connected to a first pneumatic telescopic rod installed on the top surface of the processing frame. The inner side of one end of the cross shaft is fitted with the output end of the first pneumatic telescopic rod through a bearing. A bending shaft is fixed to the other end of the cross shaft. A bending wheel is fixed to the end of the bending shaft near the bending die. A clearance space is formed between the bending wheel and the corresponding end of the bending shaft, which can engage with the internal exhaust pipe body structure. A straight toothed plate that can mesh with the middle of the transmission gear is movably fitted inside the frame plate. The top structure of the processing frame has a first sliding groove that movably fits with the straight toothed plate. One end of the straight toothed plate passes through the first sliding groove and is drivenly connected to a second pneumatic telescopic rod fitted inside the processing frame.

[0010] Preferably, the end of the bending shaft near the bending die is externally clamped to a guide sleeve plate installed on the top of the processing frame, and the housing surface of the second pneumatic telescopic rod is fixed with a support rod that penetrates the top structure of the processing frame and is connected to the bottom of the frame plate.

[0011] Preferably, the first movable mold assembly includes a first adjusting cylinder and a first movable mold body. The inside of the bending mold is provided with a first receiving groove that engages with the first movable mold body. A first support is installed between the housing surface of the first adjusting cylinder and the surface of the bending mold. The output end of the first adjusting cylinder is connected to the end of the first movable mold body away from the third bend.

[0012] Specifically, the first cylinder bending assembly includes a first cylinder, a second cylinder, a first linkage plate, and a first bending wheel. The first cylinder, the second cylinder, and the first linkage plate are all fitted inside the processing frame. A fixed seat is installed between the shell surface of the first cylinder and the inner wall of the processing frame. The output end of the first cylinder is connected to the shell surface of the second cylinder. The top structure of the processing frame has a second sliding groove that is movably fitted with the first linkage plate. The bottom of the first linkage plate is connected to the output end of the second cylinder. The top of the first linkage plate passes through the second sliding groove and is fitted with the first bending wheel through a pin.

[0013] Selectedly, the second movable mold assembly includes a second adjusting cylinder and a second movable mold body. The interior of the bending mold has a second receiving groove that engages with the second movable mold body. A second support is installed between the housing surface of the second adjusting cylinder and the surface of the bending mold. The output end of the second adjusting cylinder is connected to the end of the second movable mold body away from the fourth bend.

[0014] The second cylinder bending assembly includes a third cylinder, a fourth cylinder, a second linkage plate, and a second bending wheel. The output end of the third cylinder is connected to the housing surface of the fourth cylinder, and the output end of the fourth cylinder is connected to the top of the second linkage plate. The bottom structure of the second linkage plate is fitted with the second bending wheel through a pin. A first auxiliary support is installed between the housing surface of the third cylinder and the top of the processing frame.

[0015] Selectedly, the fifth cylinder bending assembly includes an eighth cylinder, a fifth linkage plate, and a fifth bending wheel. The housing of the eighth cylinder is mounted on a support frame, and the output end of the eighth cylinder is connected to the top of the fifth linkage plate via a transmission connection. The bottom structure of the fifth linkage plate is fitted with the fifth bending wheel via a pin.

[0016] Selectedly, the third cylinder bending assembly includes a fifth cylinder, a sixth cylinder, a third linkage plate, and a third bending wheel. The output end of the fifth cylinder is connected to the housing surface of the sixth cylinder. A second auxiliary bracket is installed between the housing surface of the fifth cylinder and the top surface of the processing frame. The output end of the sixth cylinder is connected to one end of the third linkage plate, and the other end of the third linkage plate is fitted with the third bending wheel through a pin.

[0017] The fourth cylinder bending assembly includes a seventh cylinder, a fourth linkage plate, and a fourth bending wheel. The output end of the seventh cylinder is connected to the top of the fourth linkage plate, and the bottom structure of the fourth linkage plate is fitted with the fourth bending wheel through a pin. A third auxiliary support is installed between the housing surface of the seventh cylinder and the top surface of the processing frame.

[0018] Specifically, the processing frame has a first assembly groove and a positioning groove inside, which are engaged with the bending die. The positioning groove is spatially connected to the first assembly groove, and a linkage plate is engaged in the positioning groove. A second assembly groove is formed on the surface of the positioning die away from the sixth bend. The two ends of the linkage plate are respectively engaged in the second assembly groove and connected to the transmission of the adjusting cylinder. A fourth auxiliary bracket is installed between the housing surface of the adjusting cylinder and the surface of the bending die.

[0019] Preferably, a safety light curtain is installed on the top of the processing frame, and the working range of the safety light curtain covers the top of the processing frame, thereby improving the safety protection effect of the overall device during the processing.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The one-time forming precision pipe bending machine provided by this utility model allows the bending action to be performed at a low position at the top of the processing frame during the subsequent processing of the internal exhaust pipe body, resulting in high space utilization and compact equipment.

[0022] 2. The bending die inside this utility model is made of die steel and has undergone heat treatment and precision machining, making it wear-resistant and with a long service life.

[0023] 3. The strokes of the multiple cylinder components inside this utility model are all adjustable, enabling precise pipe bending dimensions and one-time high-precision molding of the product, ensuring stability and reliability. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0025] Figure 2 This is an enlarged schematic diagram of the bending die structure of this utility model;

[0026] Figure 3 This is an enlarged schematic diagram of the structural positioning component of this utility model;

[0027] Figure 4 This is an enlarged schematic diagram of the positioning mold head of this utility model;

[0028] Figure 5 This is an enlarged schematic diagram of the rotary bending assembly of this utility model;

[0029] Figure 6 This is a partially enlarged schematic diagram of the rotary bending assembly of this utility model;

[0030] Figure 7 This is an enlarged schematic diagram of the first cylinder bending assembly of this utility model.

[0031] Figure 8This is an enlarged schematic diagram of the second cylinder bending assembly of this utility model.

[0032] Figure 9 This is an enlarged schematic diagram of the bending assembly of the third cylinder in this utility model.

[0033] Figure 10 This is an enlarged schematic diagram of the fourth cylinder bending assembly of this utility model.

[0034] Figure 11 This is an enlarged schematic diagram of the first movable module component of the present invention.

[0035] Figure 12 This is an enlarged schematic diagram of the second movable module component of the present invention.

[0036] Figure 13 This is an enlarged schematic diagram of the fifth cylinder bending assembly of this utility model.

[0037] In the diagram: 1. Processing frame; 2. Bending die; 3. Internal exhaust pipe body; 4. First bend; 5. Second bend; 6. Third bend; 7. Fourth bend; 8. Fifth bend; 9. Sixth bend; 10. Seventh bend; 11. Positioning transmission component; 111. Positioning cylinder; 112. First transmission plate; 12. Rotary bending assembly; 121. Frame plate; 122. Transmission gear; 123. Cross shaft; 124. First pneumatic telescopic rod; 125. Second pneumatic telescopic rod; 126. Straight tooth plate; 127. Bending shaft; 128. Bending wheel; 129. Guide sleeve; 13. First movable die assembly; 131. First adjusting cylinder; 132. First movable die body; 14. First cylinder bending assembly; 141. First cylinder; 142. Second cylinder; 43. First linkage plate; 144. First bending wheel; 15. Second movable mold assembly; 151. Second adjusting cylinder; 152. Second movable mold body; 16. Second cylinder bending assembly; 161. Third cylinder; 162. Fourth cylinder; 163. Second linkage plate; 164. Second bending wheel; 17. Third cylinder bending assembly; 171. Fifth cylinder; 172. Sixth cylinder; 173. Third linkage plate; 174. Third bending wheel; 18. Fourth cylinder bending assembly; 181. Seventh cylinder; 182. Fourth linkage plate; 183. Fourth bending wheel; 19. Positioning mold head; 20. Fifth cylinder bending assembly; 201. Eighth cylinder; 202. Fifth linkage plate; 203. Fifth bending wheel; 21. Silencing block; 22. Safety light curtain; 23. Linkage plate; 24. Adjusting cylinder. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figure 1-3 , Figure 13 A precision pipe bending machine for one-time forming of internal exhaust pipe includes a processing frame 1 and an internal exhaust pipe body 3. A bending die 2 is installed on the top of the processing frame 1. The interior of the bending die 2 is provided with a relief groove to accommodate the head end of the internal exhaust pipe body 3. A positioning component that can clamp and limit the structure of the head end of the internal exhaust pipe body 3 is provided above the relief groove. The surface of the bending die 2 is provided with a seventh bend 10, a first bend 4, a second bend 5, a third bend 6, a fourth bend 7, a fifth bend 8 and a sixth bend 9 along its circumference.

[0040] Above the space where the seventh bend 10 is located, a fifth cylinder bending assembly 20 is provided. Rotary bending assemblies 12 aligned with their own positions are provided on the outside of the first bend 4, the second bend 5, and the fifth bend 8. A first movable mold assembly 13, a second movable mold assembly 15, and a positioning mold head 19 are respectively provided inside the third bend 6, the fourth bend 7, and the sixth bend 9. A first cylinder bending assembly 14 that cooperates with its own bending process is provided on the outside of the first movable mold assembly 13. A second cylinder bending assembly 16 that cooperates with its own bending process is provided on the outside of the second movable mold assembly 15. A third cylinder bending assembly 17 and a fourth cylinder bending assembly 18 that cooperate with its own bending process are provided on the outside of the positioning mold head 19. The relative movement adjustment of the fourth cylinder bending assembly 18 and the positioning mold head 19 can clamp and limit the tail end of the internal exhaust pipe body 3.

[0041] The positioning assembly includes a positioning transmission component 11 and a noise-reducing block 21. The positioning transmission component 11 includes a positioning cylinder 111 and a first transmission plate 112. The output end of the positioning cylinder 111 is connected to the first transmission plate 112. A support frame fixed to the top of the processing frame 1 is installed on the housing surface of the positioning cylinder 111. The noise-reducing block 21 can engage with the bending die 2 under the transmission of the positioning cylinder 111 through the first transmission plate 112 to clamp and limit the head end of the inner exhaust pipe body 3.

[0042] The fifth cylinder bending assembly 20 includes an eighth cylinder 201, a fifth linkage plate 202, and a fifth bending wheel 203. The housing of the eighth cylinder 201 is mounted on a support frame, and the output end of the eighth cylinder 201 is connected to the top of the fifth linkage plate 202 via a transmission connection. The bottom structure of the fifth linkage plate 202 is fitted to the fifth bending wheel 203 via a pin.

[0043] Specific implementation of this embodiment:

[0044] The specific sequence of bending processing for the internal exhaust pipe body 3 is: seventh bend 10, sixth bend 9, first bend 4, second bend 5, third bend 6, fourth bend 7, fifth bend 8, and sixth bend 9. The specific bending processing corresponding to the seventh bend 10 is as follows:

[0045] Before bending the inner exhaust pipe body 3, the limiting installation is performed by first fitting the first end of the inner exhaust pipe body 3 into the relief groove, then fitting the muffler block 21 into the relief groove and fitting it into the surface of the inner exhaust pipe body 3, and then opening the positioning cylinder 111. The output end of the positioning cylinder 111 drives the first transmission plate 112 to move down until the first transmission plate 112 is tightly attached to the muffler block 21 and clamps and limits the first end of the inner exhaust pipe body 3.

[0046] Next, the eighth cylinder 201 is started, and the output end of the eighth cylinder 201 drives the fifth linkage plate 202 and the fifth bending wheel 203 to move down automatically, so that the fifth bending wheel 203 is fitted with the pipe structure corresponding to the inner exhaust pipe body 3 and performs forced bending processing on the pipe structure corresponding to the inner exhaust pipe body 3. After completion, the eighth cylinder 201 is closed, and the fifth linkage plate 202 and the fifth bending wheel 203 are reset.

[0047] Please see Figure 1 , Figure 10 The fourth cylinder bending assembly 18 includes a seventh cylinder 181, a fourth linkage plate 182, and a fourth bending wheel 183. The output end of the seventh cylinder 181 is connected to the top of the fourth linkage plate 182, and the bottom structure of the fourth linkage plate 182 is fitted with the fourth bending wheel 183 through a pin. A third auxiliary bracket is installed between the housing surface of the seventh cylinder 181 and the top surface of the processing frame 1.

[0048] Specific implementation of this embodiment:

[0049] The limiting mechanism for the tail end of the internal exhaust pipe body 3 is implemented at the sixth bend 9, as detailed below:

[0050] The seventh cylinder 181 is activated, and the output end of the seventh cylinder 181 drives the fourth linkage plate 182, which in turn drives the corresponding fourth bending wheel 183 to move down automatically. During the downward movement, the fourth bending wheel 183 will gradually contact the pipe structure at the tail end of the internal exhaust pipe body 3 and, in the further downward movement, cooperate with the blocking and limiting of the positioning mold head 19 to perform preliminary bending processing and clamping and limiting of the pipe structure at the tail end of the internal exhaust pipe body 3.

[0051] Please see Figure 1-2 , Figure 5-6 The rotary bending assembly 12 includes a frame plate 121 mounted on the top of the processing frame 1. A transmission gear 122 is fitted inside the frame plate 121. The transmission gear 122 is provided with a spline groove and is connected to a cross shaft 123 through the spline groove. One end of the cross shaft 123 is connected to a first pneumatic telescopic rod 124 mounted on the top surface of the processing frame 1. The inner side of one end of the cross shaft 123 is fitted with the output end of the first pneumatic telescopic rod 124 through a bearing. A bending shaft 127 is fixed to the other end of the cross shaft 123. A bending wheel 128 is fixed to the end of the bending shaft 127 near the bending die 2. The bending wheel 128 corresponds to the end of the bending shaft 127. A clearance space is formed between them, which can be engaged with the internal exhaust pipe body 3. A straight tooth plate 126 that can mesh with the middle of the transmission gear 122 is movably sleeved inside the frame plate 121. The top structure of the processing frame 1 is provided with a first sliding groove that movably engages with the straight tooth plate 126. One end of the straight tooth plate 126 passes through the first sliding groove and is connected to a second pneumatic telescopic rod 125 that is fitted inside the processing frame 1. The end of the bending shaft 127 near the bending die 2 is externally engaged with a guide sleeve plate 129 installed on the top of the processing frame 1. A support rod that passes through the top structure of the processing frame 1 and is connected to the bottom of the frame plate 121 is fixed on the shell surface of the second pneumatic telescopic rod 125.

[0052] Specific implementation of this embodiment:

[0053] When the machining cycle reaches the positions of the first bend 4, the second bend 5, and the fifth bend 8, the automatic bending process will be performed by the corresponding rotary bending components 12 of the first bend 4, the second bend 5, and the fifth bend 8, as follows:

[0054] Taking the bending process of the rotary bending assembly 12 corresponding to the first bend 4 as an example, the first pneumatic telescopic rod 124 is activated, and the output end of the first pneumatic telescopic rod 124 drives the bending shaft 127 and the bending wheel 128 through the cross shaft 123. This causes the pipe structure at the corresponding position of the internal exhaust pipe body 3 to be engaged in the clearance space formed by the bending shaft 127 and the bending wheel 128. Then, the second pneumatic telescopic rod 125 is activated, and the output end of the second pneumatic telescopic rod 125 drives the straight tooth plate 126 to move upward, so that the straight tooth plate 126 is positioned... Simultaneously, the transmission gear 122 engages with the bending shaft 127, which in turn drives the bending wheel 128 to rotate counterclockwise. Since the bending shaft 127 and the cross shaft 123 are set at the same center, the bending center at this time is the central axis of the bending shaft 127. Therefore, as the bending wheel 128 rotates along the central axis of the bending shaft 127, it will forcibly and synchronously bend the pipe structure corresponding to the inner exhaust pipe body 3 by extending its own rotation trajectory. The rotation angle between the bending shaft 127 and the bending wheel 128 is 180 degrees.

[0055] It should be noted that since the bending direction of the second bend 5 is opposite to that of the first bend 4 and the fourth bend 7, the initial state of the corresponding second pneumatic telescopic rod 125 should be open. Therefore, in the specific steps, the open state of the second pneumatic telescopic rod 125 should be closed, and the output end of the second pneumatic telescopic rod 125 drives the straight tooth plate 126 to move down. At the same time, the straight tooth plate 126 displaces and meshes with the transmission gear 122, thereby driving the bending shaft 127 and the bending wheel 128 to rotate clockwise. After completion, the moving structures are reset.

[0056] Please see Figure 1-2 , Figure 7 , Figure 11 The first movable mold assembly 13 includes a first adjusting cylinder 131 and a first movable mold body 132. The bending mold 2 has a first receiving groove inside that engages with the first movable mold body 132. A first support is installed between the housing surface of the first adjusting cylinder 131 and the surface of the bending mold 2. The output end of the first adjusting cylinder 131 is connected to the end of the first movable mold body 132 away from the third bend 6. The first cylinder bending assembly 14 includes a first cylinder 141, a second cylinder 142, a first linkage plate 143, and a first bending wheel 144. Cylinder 141, second cylinder 142, and first linkage plate 143 are all fitted inside the processing frame 1. A fixed seat is installed between the housing surface of the first cylinder 141 and the inner wall of the processing frame 1. The output end of the first cylinder 141 is connected to the housing surface of the second cylinder 142. The top structure of the processing frame 1 is provided with a second sliding groove that is movably fitted with the first linkage plate 143. The bottom of the first linkage plate 143 is connected to the output end of the second cylinder 142. The top of the first linkage plate 143 passes through the second sliding groove and is fitted with the first bent wheel 144 through a pin.

[0057] Specific implementation of this embodiment:

[0058] After the bending operations at the locations of the seventh bend 10, the sixth bend 9, and the first bend 4 are completed, the bending operation should proceed sequentially to the location of the first movable mold assembly 13, as follows:

[0059] The first movable mold body 131 is activated, and the output end of the first movable mold body 131 drives the first adjusting cylinder 132, causing one end of the first adjusting cylinder 132 to protrude and be in a relatively fitted state with the pipe structure corresponding to the inner exhaust pipe body 3. Next, the second cylinder 142 is activated, and the output end of the second cylinder 142 drives the first linkage plate 143 and the first bending wheel 144 to move automatically upward, so that the bottom space of the first bending wheel 144 is aligned with the pipe structure of the inner exhaust pipe body 3 fitted on the bottom of the first adjusting cylinder 132. Then, the first cylinder 141 is activated, and the output end of the first cylinder 141 drives the second cylinder 142, the first linkage plate 143, and the first bending wheel 144 to move automatically in the second slide groove. At the same time, the first bending wheel 144 will be fitted with the pipe structure of the inner exhaust pipe body 3 and, under the limiting support of the first adjusting cylinder 132, forcefully bend the pipe structure corresponding to the inner exhaust pipe body 3. After completion, the movable structures are reset.

[0060] Please see Figure 1-2 , Figure 8 , Figure 12 The second movable mold assembly 15 includes a second adjusting cylinder 151 and a second movable mold body 152. The bending mold 2 has a second storage groove that engages with the second movable mold body 152. A second support is installed between the housing surface of the second adjusting cylinder 151 and the surface of the bending mold 2. The output end of the second adjusting cylinder 151 is connected to the end of the second movable mold body 152 away from the fourth bend 7.

[0061] The second cylinder bending assembly 16 includes a third cylinder 161, a fourth cylinder 162, a second linkage plate 163, and a second bending wheel 164. The output end of the third cylinder 161 is connected to the housing surface of the fourth cylinder 162, and the output end of the fourth cylinder 162 is connected to the top of the second linkage plate 163. The bottom structure of the second linkage plate 163 is fitted to the second bending wheel 164 through a pin. A first auxiliary bracket is installed between the housing surface of the third cylinder 161 and the top of the processing frame 1.

[0062] Specific implementation of this embodiment:

[0063] For the bending process at the location of the fourth bend 7, the second movable mold body 151 is activated, and the output end of the second movable mold body 151 drives the second adjusting cylinder 152, thereby causing one end of the second adjusting cylinder 152 to protrude and be in a relatively fitted state with the pipe structure corresponding to the position of the inner exhaust pipe body 3. Next, the fourth cylinder 162 is activated, and the output end of the fourth cylinder 162 drives the second linkage plate 163 and the second bending wheel 164 to move automatically downward, thereby aligning the bottom space of the second bending wheel 164 with the pipe structure of the inner exhaust pipe body 3 fitted on the top of the second adjusting cylinder 152. Then, the third cylinder 161 is activated, and the output end of the third cylinder 161 drives the fourth cylinder 162, the second linkage plate 163, and the second bending wheel 164 to move automatically. At the same time, the second bending wheel 164 will be fitted with the pipe structure of the inner exhaust pipe body 3 and, under the limiting support of the second adjusting cylinder 152, forcefully bend the pipe structure corresponding to the inner exhaust pipe body 3. After completion, the movable structures are reset.

[0064] Please see Figure 1-2 , Figure 9 The third cylinder bending assembly 17 includes a fifth cylinder 171, a sixth cylinder 172, a third linkage plate 173, and a third bending wheel 174. The output end of the fifth cylinder 171 is connected to the housing surface of the sixth cylinder 172. A second auxiliary bracket is installed between the housing surface of the fifth cylinder 171 and the top surface of the processing frame 1. The output end of the sixth cylinder 172 is connected to one end of the third linkage plate 173, and the other end of the third linkage plate 173 is fitted to the third bending wheel 174 through a pin.

[0065] Specific implementation of this embodiment:

[0066] For the bending process at the sixth bend 9, the fifth cylinder 171 is activated, and the output end of the fifth cylinder 171 drives the sixth cylinder 172, the third linkage plate 173, and the third bending wheel 174 to automatically move, thereby aligning the bottom space of the third bending wheel 174 with the pipe structure of the inner exhaust pipe body 3 located at the top of the positioning mold head 19. Then, the sixth cylinder 172, which is in the open state, is closed, and the output end of the sixth cylinder 172 drives the third linkage plate 173 and the third bending wheel 174 to automatically move. During the movement, the third bending wheel 174 will fit the pipe structure corresponding to the inner exhaust pipe body 3 and perform forced bending processing on the pipe structure of the inner exhaust pipe body 3 under the limiting constraint of the positioning mold head 19. After completion, all moving structures are reset.

[0067] Please see Figure 1 , Figure 4The processing frame 1 has a first assembly groove and a positioning groove inside, which are engaged with the bending die 2. The positioning groove is connected to the first assembly groove, and a linkage plate 23 is engaged in the positioning groove. The end surface of the positioning die 19 away from the sixth bend 9 has a second assembly groove. The two ends of the linkage plate 23 are engaged in the second assembly groove and are connected to the transmission of the adjusting cylinder 24. A fourth auxiliary bracket is installed between the housing surface of the adjusting cylinder 24 and the surface of the bending die 2. A safety light curtain 22 is installed on the top of the processing frame 1, and the working range of the safety light curtain 22 covers the top of the processing frame 1, thereby improving the safety protection effect of the overall device during the processing.

[0068] Specific implementation of this embodiment:

[0069] Considering the wear and replacement of the positioning die 19, the linkage plate 23 and the adjusting cylinder 24 are used to limit and lock the positioning die 19 and the bending die 2 together. When the positioning die 19 needs to be replaced, the adjusting cylinder 24 is closed, the linkage plate 23 is reset, and the locking limit between the linkage plate 23 and the positioning die 19 is released. Then, the severely worn positioning die 19 can be directly removed. Then, the new positioning die 19 is assembled with the bending die 2, the adjusting cylinder 24 is reopened, and the adjusting cylinder 24 drives the linkage plate 23 to lock and limit the new positioning die 19.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A one-step precision bending machine for exhaust pipe, comprising a processing frame (1) and an exhaust pipe body (3), characterized in that: The top of the processing frame (1) is provided with a bending die (2), the inside of the bending die (2) is provided with a gap accommodating the front end of the inner exhaust pipe body (3), and the gap is provided with a positioning assembly capable of clamping and limiting the structure of the front end of the inner exhaust pipe body (3); the surface of the bending die (2) is respectively provided with a seventh bending portion (10), a first bending portion (4), a second bending portion (5), a third bending portion (6), a fourth bending portion (7), a fifth bending portion (8) and a sixth bending portion (9) along the circumference thereof; The space above the seventh bending portion (10) is provided with a fifth cylinder bending assembly (20), the outer sides of the first bending portion (4), the second bending portion (5) and the fifth bending portion (8) are respectively provided with a rotary bending assembly (12) aligned with the positions thereof, the third bending portion (6), the fourth bending portion (7) and the sixth bending portion (9) are respectively provided with a first movable die assembly (13), a second movable die assembly (15) and a positioning die head (19), and the outer side of the first movable die assembly (13) is provided with a first cylinder bending assembly (14) matched with the bending processing thereof, and the outer side of the second movable die assembly (15) is provided with a second cylinder bending assembly (16) matched with the bending processing thereof; The outer side of the positioning die head (19) is provided with a third cylinder bending assembly (17) and a fourth cylinder bending assembly (18) matched with the bending processing thereof, and the relative movement of the fourth cylinder bending assembly (18) and the positioning die head (19) can clamp and limit the tail end of the inner exhaust pipe body (3).

2. A one-shot precision pipe bender for inner exhaust pipes according to claim 1, characterized in that: The positioning assembly comprises a positioning transmission component (11) and a soundproof clamping block (21), the positioning transmission component (11) comprises a positioning cylinder (111) and a first transmission plate (112), the output end of the positioning cylinder (111) is in transmission connection with the first transmission plate (112), the shell surface of the positioning cylinder (111) is provided with a support frame fixed on the top of the processing frame (1), and the soundproof clamping block (21) can be clamped with the bending die (2) under the transmission of the positioning cylinder (111) through the first transmission plate (112) to clamp and limit the front end of the inner exhaust pipe body (3).

3. A one-shot precision pipe bender for inner exhaust pipes according to claim 1, characterized in that: The rotating and bending assembly (12) comprises a frame plate (121) mounted on the top of the machining rack (1), the inside of the frame plate (121) is sleeved with a transmission gear (122), the transmission gear (122) is provided with a spline groove and is clamped with a cross shaft (123) through the spline groove, one end of the cross shaft (123) is drivingly connected with a first pneumatic telescopic rod (124) mounted on the top surface of the machining rack (1), and the inside of the end of the cross shaft (123) is sleeved with the output end head of the first pneumatic telescopic rod (124) through a bearing, the other end of the cross shaft (123) is fixedly connected with a bending shaft (127), and the end of the bending shaft (127) close to the bending die (2) is fixedly connected with a bending wheel (128), and the bending wheel (128) and the corresponding end of the bending shaft (127) form a space for allowing the inner exhaust pipe body (3) to be clamped, the inside of the frame plate (121) is movably sleeved with a straight toothed plate (126) capable of being engaged with the middle part of the transmission gear (122), and the top structure of the machining rack (1) is provided with a first sliding groove movably sleeved with the straight toothed plate (126), and one end of the straight toothed plate (126) penetrates through the first sliding groove and is drivingly connected with a second pneumatic telescopic rod (125) sleeved in the machining rack (1).

4. A one-shot precision pipe bender for inner exhaust pipes according to claim 3, characterized in that: The end of the bending shaft (127) close to the bending die (2) is movably sleeved with a guide sleeve plate (129) mounted on the top of the machining rack (1), and the surface of the shell of the second pneumatic telescopic rod (125) is fixedly connected with a supporting rod penetrating through the top structure of the machining rack (1) and connected with the bottom of the frame plate (121).

5. A one-shot precision pipe bender for inner exhaust pipes according to claim 1, characterized in that: The first movable mold assembly (13) comprises a first adjusting cylinder (131) and a first movable mold body (132), the inside of the bending die (2) is provided with a first receiving groove clamped with the first movable mold body (132), a first support is mounted between the surface of the first adjusting cylinder (131) and the surface of the bending die (2), and the output end of the first adjusting cylinder (131) is drivingly connected with one end of the first movable mold body (132) away from the third bending part (6).

6. A one-shot precision pipe bender for inner exhaust pipes according to claim 5, characterized in that: The first cylinder bending assembly (14) comprises a first cylinder (141), a second cylinder (142), a first linkage plate (143) and a first bending wheel (144), the first cylinder (141), the second cylinder (142) and the first linkage plate (143) are sleeved in the inside of the machining rack (1), a fixing seat is mounted between the surface of the first cylinder (141) and the inner wall of the machining rack (1), the output end of the first cylinder (141) is drivingly connected with the surface of the second cylinder (142), the top structure of the machining rack (1) is provided with a second sliding groove movably sleeved with the first linkage plate (143), the bottom of the first linkage plate (143) is drivingly connected with the output end of the second cylinder (142), and the top of the first linkage plate (143) penetrates through the second sliding groove and is sleeved with the first bending wheel (144) through a wheel pin.

7. A one-shot precision pipe bender for inner exhaust pipe according to claim 1, characterized in that: The second movable die assembly (15) comprises a second adjusting cylinder (151) and a second movable die body (152), a second receiving groove is formed in the inside of the bending die (2) and is clamped with the second movable die body (152), a second support is installed between the surface of the shell of the second adjusting cylinder (151) and the surface of the bending die (2), and the output end of the second adjusting cylinder (151) is in transmission connection with one end of the second movable die body (152) away from the fourth bending position (7).

8. A one-shot precision pipe bender for inner exhaust pipes according to claim 7, characterized in that: The second cylinder bending assembly (16) comprises a third cylinder (161), a fourth cylinder (162), a second linkage plate (163) and a second bending wheel (164), the output end of the third cylinder (161) is in transmission connection with the surface of the shell of the fourth cylinder (162), the output end of the fourth cylinder (162) is in transmission connection with the top of the second linkage plate (163), the bottom structure of the second linkage plate (163) is sleeved with the second bending wheel (164) through a wheel pin, and a first auxiliary support is installed between the surface of the shell of the third cylinder (161) and the top of the machining rack (1).

9. A one-shot precision pipe bender for inner exhaust pipes according to claim 2, characterized in that: The fifth cylinder bending assembly (20) comprises an eighth cylinder (201), a fifth linkage plate (202) and a fifth bending wheel (203), the shell of the eighth cylinder (201) is installed on a support frame, the output end of the eighth cylinder (201) is in transmission connection with the top of the fifth linkage plate (202), and the bottom structure of the fifth linkage plate (202) is sleeved with the fifth bending wheel (203) through a wheel pin.

10. A one-shot precision pipe bender for inner exhaust pipes according to claim 1, characterized in that: The third cylinder bending assembly (17) comprises a fifth cylinder (171), a sixth cylinder (172), a third linkage plate (173) and a third bending wheel (174), the output end of the fifth cylinder (171) is in transmission connection with the surface of the shell of the sixth cylinder (172), a second auxiliary support is installed between the surface of the shell of the fifth cylinder (171) and the top surface of the machining rack (1), the output end of the sixth cylinder (172) is in transmission connection with one end of the third linkage plate (173), and the other end of the third linkage plate (173) is sleeved with the third bending wheel (174) through a wheel pin. The fourth cylinder bending assembly (18) comprises a seventh cylinder (181), a fourth linkage plate (182) and a fourth bending wheel (183), the output end of the seventh cylinder (181) is in transmission connection with the top of the fourth linkage plate (182), the bottom structure of the fourth linkage plate (182) is sleeved with the fourth bending wheel (183) through a wheel pin, and a third auxiliary support is installed between the surface of the shell of the seventh cylinder (181) and the top surface of the machining rack (1). The inside of the processing frame (1) is provided with a first assembly groove of a positioning die head (19) clamped with the bending die (2), a positioning groove in space communication with the first assembly groove, and a linkage plate (23) clamped in the positioning groove, a second assembly groove is formed in the surface of one end of the positioning die head (19) away from the sixth bending position (9), the two ends of the linkage plate (23) are clamped in the second assembly groove respectively and are transmissionally connected with an adjusting cylinder (24), a fourth auxiliary support is installed between the surface of the shell of the adjusting cylinder (24) and the surface of the bending die (2), and a safety grating (22) is arranged on the top of the processing frame (1), and the working range of the safety grating (22) covers the top of the processing frame (1).

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