High-precision bending tube stamping process

Abstract

This invention discloses a high-precision bending tube stamping process in the field of pipe stamping technology, comprising the following steps: Step 1, die preparation; Step 2, material preparation; Step 3, parameter adjustment; Step 4, pipe installation; Step 5, pipe positioning; Step 6, bending stamping; Step 7, inspection. This invention, by acquiring the sliding time of the pre-stamped pipe fitting within the stamping die, comparing the position of the pipe fitting before and after clamping, and detecting the pressure values ​​at multiple points in the pre-stamped pipe fitting installation area within the stamping die before and after clamping, can effectively monitor whether there are any abnormalities in the stamping die and pipe fitting during the stamping process, quickly obtain the wear condition of the stamping die, and ensure the accuracy of the stamped pipe fittings in the same batch.

Description

Technical Field

[0001] This invention belongs to the field of pipe stamping technology, specifically a high-precision bending pipe stamping process. Background Technology

[0002] According to the manufacturing method of pipe bending, pipe bending can be divided into hot bending, stamping bending and welding bending. Among them, stamping bending is an efficient pipe bending method and is used in many fields. In the process of stamping pipe fittings, the precision control of stamped pipe fittings is crucial. Since the stamping process is carried out in batches, the precision abnormalities of stamped pipe fittings often occur in batches, resulting in huge material waste.

[0003] To ensure the accuracy of bent and stamped tubes, post-stamping inspection is often performed using manual methods and image recognition. The accuracy of the stamped tubes is determined by checking whether the dimensional errors are within acceptable limits. For example, Chinese patent document CN104959445A describes a stamping process for tubular workpieces, which includes the following steps: S1. Cleaning the surface of the tubular workpiece and the surface of the fixture; S2. Placing the tubular workpiece in the fixture according to the processing direction and clamping it; S3. After ensuring the tubular workpiece is clamped, starting the press switch. If the alarm does not sound, processing begins to form the stamped groove; otherwise, the machine is stopped to check the cause of the alarm; S4. After processing, the tubular workpiece is inspected; S5. The tubular workpiece undergoes post-processing and is stored in the warehouse.

[0004] However, the wear detection of stamping dies was overlooked. When the wear of the stamping dies exceeds the threshold, the stamped pipe fittings will exhibit abnormal precision in batches. The wear condition of the stamping dies is difficult to obtain intuitively by inspecting the finished pipe fittings alone. Stamping die wear detection before each stamping can solve the above problem. However, there are cases where the wear of the stamping dies exceeds the threshold during batch stamping, and at this time it is difficult to obtain the wear condition of the stamping dies, resulting in the inability to guarantee the precision of the same batch of stamped pipe fittings. Summary of the Invention

[0005] The purpose of this invention is to provide a high-precision bending tube stamping process to solve the problem that when the wear of the stamping die exceeds the threshold during batch stamping, it is difficult to obtain the wear condition of the stamping die, which makes it difficult to guarantee the accuracy of the same batch of stamped tubes.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a high-precision bent tubular stamping process, comprising the following steps:

[0007] Step 1: Prepare the die: Select the appropriate stamping die according to the requirements of the bent pipe fitting and the design drawings, and install the stamping die on the stamping equipment;

[0008] Step 2, Material Preparation: Based on the requirements of the bent pipe fittings and the design drawings, pre-process the pipe fittings to obtain pre-stamped pipe fittings;

[0009] Step 3, Parameter Adjustment: Based on the requirements and design drawings of the bent pipe fittings, obtain the material and shape of the stamping bent pipe fittings, and set the parameters of the stamping equipment according to the material and shape of the stamping bent pipe fittings;

[0010] Step 4, Pipe installation: The pre-stamped pipes are transported one by one into the stamping die using a conveying device. The sliding time of each pre-stamped pipe in the stamping die is recorded. When the sliding time exceeds the threshold, the stamping die is inspected.

[0011] Step 5, Pipe positioning: When the sliding time does not exceed the threshold, the position of the pipe in the unclamped state and the position of the pipe in the clamped state are detected by the stamping equipment. When the deviation between the position of the pipe in the unclamped state and the position of the pipe in the clamped state exceeds the threshold, the stamping die is detected.

[0012] Step 6, Bending and Stamping: When the position of the pipe fitting in the unclamped state does not deviate from the position of the pipe fitting in the clamped state, the stamping punch is driven by the stamping equipment to stamp the pre-stamped pipe fitting according to the set stamping equipment parameters, thus obtaining a high-precision stamped and bent pipe fitting.

[0013] Furthermore, it also includes step 7, inspection, which involves randomly sampling the obtained stamped and bent tubes. When the accuracy of the randomly sampled stamped and bent tubes is abnormal, the stamping punch is inspected.

[0014] Furthermore, the pretreatment of pipe fittings specifically includes cleaning, cutting, and heat treatment of the pipe blank.

[0015] Furthermore, the parameters of the stamping equipment include stamping speed, stamping force, stamping depth, and process temperature.

[0016] Furthermore, in step 5, pipe positioning, the pressure at multiple detection points of the stamping die is detected when the pipe is not clamped. When the pressure difference between the detection points exceeds the threshold when the pipe is not clamped, both the stamping die and the pre-stamped pipe are detected.

[0017] When the pressure difference between the detection points does not exceed the threshold when the pipe is not clamped, the pressure of multiple detection points of the stamping die is detected when the pipe is clamped. When the pressure difference between the detection points exceeds the threshold when the pipe is clamped, only the pre-stamped pipe is detected.

[0018] Furthermore, the stamping equipment includes a stamping base, a first mounting plate for mounting a stamping die is fixedly connected to the upper surface of the stamping base, a plurality of hydraulic cylinders are fixedly connected to the side of the first mounting plate on the upper surface of the stamping base, and the output shafts of the hydraulic cylinders are fixedly connected to a second mounting plate for mounting a stamping punch. The stamping die and the stamping punch are detachably connected to the first mounting plate and the second mounting plate, respectively.

[0019] The side wall of the stamping die is provided with several first detection components for detecting the pressure of the pre-stamped tube. The upper surface of the stamping base and the end of the stamping die are provided with a second detection component for detecting the position of the stamped tube. The first and second detection components are electrically connected to a controller. The controller is used to collect the time point when the initial part of the pre-stamped tube contacts the first detection component and the time point when it contacts the second detection component, and output the sliding time of the pre-stamped tube in the stamping die.

[0020] Furthermore, the conveying equipment includes a conveying base, a conveying groove is provided on the upper surface of the conveying base, and several conveying terminals are fixedly connected to both sides of the conveying groove. The conveying groove is connected to the pre-stamped pipe installation area of ​​the stamping die.

[0021] Furthermore, the first detection component includes several first detection slots opened in the pre-stamped tube installation area of ​​the stamping die. Each first detection slot has a detection wedge slidably fitted inside it. Each first detection slot has a first strain gauge fixedly connected to its bottom. The first strain gauge is electrically connected to the controller. An elastic element is provided at the bottom of the detection wedge. The elastic element applies a spring force to the detection wedge outward from the first detection slot.

[0022] Furthermore, the inclined surface of the detection wedge faces the direction of the pre-stamped pipe fitting conveyor; when the detection wedge is retracted into the first detection groove, the plane of the detection wedge is flush with the side wall of the pre-stamped pipe fitting installation area of ​​the stamping die.

[0023] Furthermore, the second detection component includes a detection plate with a second detection groove on its surface. A second strain gauge is fixedly connected inside the second detection groove. The shape of the second strain gauge matches the shape of the nozzle of the pre-stamped pipe fitting. The second strain gauge is electrically connected to the controller.

[0024] The above approach has the following beneficial effects:

[0025] 1. This invention obtains the initial contact time between the pre-stamped tube and the first detection component, and the final contact time with the second detection component, thereby obtaining the sliding time of the pre-stamped tube within the stamping die. By comparing the sliding time of the same batch of pre-stamped tubes within the stamping die, it is found that the gap between the normal stamping die and the pre-stamped tube is stable. When the wear of the stamping die is within a threshold range, the friction between the die and the pre-stamped tube is also within a threshold range. When the wear of the stamping die exceeds the threshold range, the friction between the die and the pre-stamped tube exceeds the threshold range.

[0026] When the stamping die is excessively worn, the gap between some areas and the pre-stamped tube changes excessively, resulting in a decrease in the friction between them. Consequently, the sliding time of the pre-stamped tube in the stamping die decreases. When the decrease exceeds a threshold, it indicates that the stamping die is excessively worn. Compared with existing technologies, this method can obtain information on the wear of the stamping die without stopping the stamping process. When the stamping die is excessively worn, it can be obtained immediately, thereby avoiding accuracy errors in subsequent tube stamping and ensuring the accuracy of tubes stamped in the same batch.

[0027] 2. In this invention, by comparing the position of the pipe fitting before and after clamping, if the wear of the stamping die is within the threshold range, the compression area of ​​the pipe fitting opening on the second strain gauge should remain unchanged before and after clamping. If the compression area on the second strain gauge changes before and after clamping, it indicates that the stamping die may be misaligned or that a certain area is excessively worn, thus further obtaining information on the wear of the stamping die. In addition, by obtaining the extrusion force of the pipe fitting on the second strain gauge, it is possible to determine whether the pipe fitting is installed in the correct position.

[0028] 3. This invention detects the pressure values ​​at multiple points in the pre-stamped pipe installation area within the stamping die before and after clamping the pipe. If the pressure difference between points exceeds a threshold before clamping, both the stamping die and the pre-stamped pipe may be abnormal. If the pressure difference between points exceeds a threshold after clamping, the pre-stamped pipe may be abnormal due to clamping. This further improves the detection of abnormalities in pipes and stamping dies during the stamping process.

[0029] In summary, by acquiring the sliding time of the pre-stamped pipe fitting in the stamping die, comparing the position of the pipe fitting before and after clamping, and detecting the pressure values ​​at multiple points in the pre-stamped pipe fitting installation area in the stamping die before and after clamping, this invention can effectively monitor whether there are any abnormalities in the stamping die and the pipe fitting during the stamping process, quickly obtain the wear condition of the stamping die, and ensure the accuracy of the same batch of stamped pipe fittings.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] Figure 1 This is a flowchart illustrating an embodiment of the high-precision bent tubular stamping process of the present invention;

[0032] Figure 2 This is a schematic diagram of the stamping equipment and conveying equipment in an embodiment of the high-precision bent tubular stamping process of the present invention;

[0033] Figure 3 This is a front view of the stamping equipment and conveying equipment in an embodiment of the high-precision bent tube stamping process of the present invention;

[0034] Figure 4 This is a cross-sectional view of the stamping die in an embodiment of the high-precision bent tubular stamping process of the present invention;

[0035] Figure 5 This is a partially enlarged schematic diagram (A) of an embodiment of the high-precision bent tubular stamping process of the present invention;

[0036] Figure 6 This is a front view of the second detection component in an embodiment of the high-precision bent tubular stamping process of the present invention;

[0037] Figure 7 This is a cross-sectional view of the second detection component in an embodiment of the high-precision bent tubular stamping process of the present invention. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0041] The following detailed description illustrates the specific implementation method:

[0042] The reference numerals in the accompanying drawings include: 1. Conveying base; 2. Conveying terminal; 3. Conveying groove; 4. Mounting area; 5. Stamping base; 6. Hydraulic cylinder; 7. Limiting post; 8. Clamp; 9. First detection component; 10. Second mounting plate; 11. Second detection component; 12. Stamping punch; 13. Stamping die; 14. First detection groove; 15. Detection wedge; 16. First strain gauge; 17. Telescopic shaft; 18. Limiting ring; 19. Spring; 20. Detection plate; 21. Second detection groove; 22. Second strain gauge.

[0043] Example 1

[0044] As attached Figure 1 The high-precision bending and stamping process for tubular shapes includes the following steps:

[0045] Step 1: Prepare the die: Select the appropriate stamping die according to the requirements of the bent pipe fitting and the design drawings, and install the stamping die on the stamping equipment.

[0046] Step 2, Material Preparation: According to the requirements of the bent pipe fittings and the design drawings, the pipe fittings are pre-processed to obtain pre-stamped pipe fittings.

[0047] Pre-treatment of pipe fittings specifically includes cleaning, cutting, and heat treatment of the pipe blank, which helps to improve the plasticity of the material and the stability of the processing technology.

[0048] Step 3, Parameter Adjustment: Based on the requirements and design drawings of the bent pipe fittings, obtain the material and shape of the stamped bent pipe fittings, and set the parameters of the stamping equipment according to the material and shape of the stamped bent pipe fittings.

[0049] The parameters of stamping equipment include stamping speed, stamping force, stamping depth, and process temperature. These parameters affect the shape and size of the pipe, and ensuring correct process parameter settings can achieve the required stamping accuracy. Different materials have different deformation characteristics and resilience, so their stamping performance must be considered when selecting materials. The hardness, toughness, and deformation limit of the material will directly affect the deformation and accuracy during the stamping process.

[0050] Step 4, Pipe installation: The pre-stamped pipes are transported one by one into the stamping die 13 by the conveying equipment. The sliding time of each pre-stamped pipe in the stamping die 13 is recorded. When the sliding time exceeds the threshold, the stamping die 13 is tested.

[0051] Step 5, Pipe positioning: When the sliding time does not exceed the threshold, the position of the pipe in the unclamped state and the position of the pipe in the clamped state are detected by the stamping equipment. When the deviation between the position of the pipe in the unclamped state and the position of the pipe in the clamped state exceeds the threshold, the stamping die 13 is detected.

[0052] Secondly, in this step, the pressure at multiple detection points of the stamping die 13 is also detected when the pipe is not clamped. When the pressure difference between the detection points exceeds the threshold when the pipe is not clamped, both the stamping die 13 and the pre-stamped pipe are detected.

[0053] When the pressure difference between the detection points does not exceed the threshold when the pipe fitting is not clamped, the pressure of more than 13 detection points of the stamping die is detected when the pipe fitting is clamped. When the pressure difference between the detection points exceeds the threshold when the pipe fitting is clamped, only the pre-stamped pipe fitting is detected.

[0054] Step 6, Bending and Stamping: When the position of the pipe fitting in the unclamped state does not deviate from the position of the pipe fitting in the clamped state, the stamping punch 12 is driven by the stamping equipment to stamp the pre-stamped pipe fitting according to the set stamping equipment parameters, thus obtaining a high-precision stamped and bent pipe fitting.

[0055] Step 7: Inspection. Randomly sample the obtained stamped and bent tubes. If the accuracy of the randomly sampled stamped and bent tubes is abnormal, the stamping punch 12 shall be inspected.

[0056] Random sampling inspections mainly check whether the dimensions, shape, and surface quality of the stamped and bent pipe fittings meet the requirements, in order to ensure that the stamped and bent pipe fittings meet the requirements.

[0057] Example 2

[0058] As attached Figure 2-7 As shown, this embodiment provides a stamping device and a conveying device suitable for high-precision bending tube stamping processing. The stamping device includes a stamping base 5. A first mounting plate for mounting a stamping die 13 is fixedly connected to the upper surface of the stamping base 5. Four sets of hydraulic cylinders 6 are fixedly connected next to the first mounting plate on the upper surface of the stamping base 5. The output shafts of the hydraulic cylinders 6 are jointly fixedly connected to a second mounting plate 10 for mounting a stamping punch 12. The stamping die 13 and the stamping punch 12 are detachably connected to the first mounting plate and the second mounting plate 10, respectively.

[0059] The side wall of the stamping die 13 is provided with six sets of first detection components 9 for detecting the pressure of the pre-stamped pipe. Each set of first detection components 9 consists of three components, which are distributed on the same plane. In order to ensure that the first detection components 9 can accurately collect the pressure of the pre-stamped pipe, the first detection components 9 are all set in the horizontal area of ​​the side wall of the stamping die 13.

[0060] Specifically, the first detection component 9 includes several first detection grooves 14 opened in the pre-stamped tube installation area 4 of the stamping die 13. Each first detection groove 14 is slidably fitted with a detection wedge 15. Each first detection groove 14 is fixedly connected to a first strain gauge 16. An elastic element is provided at the bottom of the detection wedge 15. The elastic element applies a spring force to the detection wedge 15 outward from the first detection groove 14.

[0061] The inclined surface of the detection wedge 15 faces the direction of the pre-stamped pipe fitting conveyor; when the detection wedge 15 is retracted into the first detection groove 14, the plane of the detection wedge 15 is flush with the side wall of the pre-stamped pipe fitting installation area 4 of the stamping die 13.

[0062] A second detection component 11 for detecting the position of the stamped tube is fixedly connected to the end of the stamping die 13 on the upper surface of the stamping base 5. Specifically, the second detection component 11 includes a detection plate 20, on the surface of which a second detection groove 21 is formed. A second strain gauge 22 is fixedly connected in the second detection groove 21. The shape of the second strain gauge 22 matches the shape of the tube opening of the pre-stamped tube.

[0063] The first strain gauge 16 and the second strain gauge 22 are electrically connected to a controller. The controller is used to acquire the time points when the initial part of the pre-stamped tube contacts the first detection component 9 and the second detection component 11, and output the sliding time of the pre-stamped tube in the stamping die 13. It is also used to acquire the strain signals of the second strain gauge 22 and each of the first strain gauges 16, and convert them into the pressure values ​​of the second strain gauge 22 and each of the first strain gauges 16.

[0064] The conveying equipment includes a conveying base 1, and a conveying groove 3 is provided on the upper surface of the conveying base 1. Several conveying terminals 2 are fixedly connected to both sides of the conveying groove 3. The conveying groove 3 is connected to the pre-stamped pipe installation area 4 of the stamping die 13, so as to ensure that after the front end of the pre-stamped pipe is separated from the conveying groove 3 and enters the pre-stamped pipe installation area 4 of the stamping die 13, it can contact the first detection component 9 closest to the conveying groove 3.

[0065] The specific implementation process is as follows:

[0066] Record the sliding time of each pre-stamped pipe fitting in the stamping die 13: When the pre-stamped pipe fitting enters the pre-stamped pipe fitting installation area 4 of the stamping die 13 from the front end of the conveying channel 3 through the conveying terminal 2, it contacts the first detection component 9 at the front end. The controller records the start time. When the pre-stamped pipe fitting slides into place in the stamping die 13, the front end of the stamping die 13 contacts the second detection component 11. The controller records the end time. By calculating the difference between the end time and the start time, the sliding time of the pre-stamped pipe fitting in the stamping die 13 can be obtained. By comparing the sliding time with the user-preset time, it is possible to determine whether there is an abnormality in the stamping die 13.

[0067] Detecting the positional change of the pipe before and after clamping: Before the pipe is clamped, the controller records the pressure value of the pipe opening on the second strain gauge 22. After the pipe is clamped, the controller records the pressure value of the pipe opening on the second strain gauge 22 again. The pressure difference between the two times is obtained. By comparing the pressure difference with the user-preset pressure difference, it is possible to determine whether there is an abnormality in the stamping die 13.

[0068] The pressure difference between the stamping die 13 points before and after the pipe fitting is clamped is detected: Before the pipe fitting is clamped, the controller records the pressure value of the pipe fitting sidewall on each first strain gauge 16. After the pipe fitting is clamped, the controller records the pressure value of the pipe fitting sidewall on each second strain gauge 22 again. The pressure difference between the first strain gauge 16 before and after the clamping is obtained. By comparing the pressure difference with the user preset pressure difference, it is possible to determine whether there is any abnormality in the stamping die 13 or the pre-stamped pipe fitting.

[0069] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific structures and / or characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-precision bending tube-shaped press working process, characterized by, Includes the following steps: Step 1: Prepare the die: Select the appropriate stamping die according to the requirements of the bent pipe fitting and the design drawings, and install the stamping die on the stamping equipment; Step 2, Material Preparation: Based on the requirements of the bent pipe fittings and the design drawings, pre-process the pipe fittings to obtain pre-stamped pipe fittings; Step 3, Parameter Adjustment: Based on the requirements and design drawings of the bent pipe fittings, obtain the material and shape of the stamping bent pipe fittings, and set the parameters of the stamping equipment according to the material and shape of the stamping bent pipe fittings; Step 4, Pipe installation: The pre-stamped pipes are transported one by one into the stamping die using a conveying device. The sliding time of each pre-stamped pipe in the stamping die is recorded. When the sliding time exceeds the threshold, the stamping die is inspected. Step 5, Pipe positioning: When the sliding time does not exceed the threshold, the position of the pipe in the unclamped state and the position of the pipe in the clamped state are detected by the stamping equipment. When the deviation between the position of the pipe in the unclamped state and the position of the pipe in the clamped state exceeds the threshold, the stamping die is detected. Step 6, Bending and stamping: When the position of the pipe fitting in the unclamped state and the position of the pipe fitting in the clamped state do not exceed the threshold, the stamping punch is driven by the stamping equipment to stamp the pre-stamped pipe fitting according to the set stamping equipment parameters, thus obtaining a high-precision stamped and bent pipe fitting. Step 5: The pipe positioning also detects the pressure at multiple detection points of the stamping die when the pipe is not clamped. When the pressure difference between the detection points exceeds the threshold when the pipe is not clamped, both the stamping die and the pre-stamped pipe are detected. When the pressure difference between the detection points does not exceed the threshold when the pipe is not clamped, the pressure of multiple detection points of the stamping die is detected when the pipe is clamped. When the pressure difference between the detection points exceeds the threshold when the pipe is clamped, only the pre-stamped pipe is detected.

2. The high-precision bending tube-shaped press working process according to claim 1, characterized in that: It also includes step 7, inspection, which involves randomly sampling the obtained stamped and bent tubes. When the accuracy of the randomly sampled stamped and bent tubes is abnormal, the stamping punch is inspected.

3. The high-precision bending tube-shaped press working process according to claim 2, characterized in that: Pre-treatment of pipe fittings specifically includes cleaning, cutting, and heat treatment of the pipe blank.

4. The high-precision bent tubular stamping process according to claim 3, characterized in that: The parameters of stamping equipment include stamping speed, stamping force, stamping depth, and process temperature.

5. The high-precision bending tube-shaped press working process according to claim 1, characterized in that: The stamping equipment includes a stamping base, a first mounting plate for mounting a stamping die is fixedly connected to the upper surface of the stamping base, a number of hydraulic cylinders are fixedly connected to the side of the first mounting plate on the upper surface of the stamping base, and the output shafts of the hydraulic cylinders are fixedly connected to a second mounting plate for mounting a stamping punch. The stamping die and the stamping punch are detachably connected to the first mounting plate and the second mounting plate, respectively. The side wall of the stamping die is provided with several first detection components for detecting the pressure of the pre-stamped tube. The upper surface of the stamping base and the end of the stamping die are provided with a second detection component for detecting the position of the stamped tube. The first and second detection components are electrically connected to a controller. The controller is used to collect the time point when the initial part of the pre-stamped tube contacts the first detection component and the time point when it contacts the second detection component, and output the sliding time of the pre-stamped tube in the stamping die.

6. The high-precision bending tube-shaped press working process according to claim 5, characterized in that: The conveying equipment includes a conveying base, with a conveying groove on the upper surface of the conveying base. Several conveying terminals are fixedly connected to both sides of the conveying groove, and the conveying groove is connected to the pre-stamped pipe installation area of ​​the stamping die.

7. The high-precision bending tube-shaped press working process according to claim 6, characterized in that: The first detection component includes several first detection slots opened in the pre-stamped tube installation area of ​​the stamping die. Each first detection slot has a detection wedge that slides in it. Each first detection slot has a first strain gauge fixedly connected to its bottom. The first strain gauge is electrically connected to the controller. An elastic element is provided at the bottom of the detection wedge. The elastic element applies a spring force to the detection wedge outward from the first detection slot.

8. The high-precision bending tube-shaped press working process according to claim 7, characterized in that: The inclined surface of the detection wedge faces the direction of the pre-stamped pipe fitting conveyor; when the detection wedge is retracted into the first detection groove, the plane of the detection wedge is flush with the side wall of the pre-stamped pipe fitting installation area of ​​the stamping die.

9. The high-precision bending tube-shaped press working process according to claim 8, characterized in that: The second detection component includes a detection plate with a second detection groove on its surface. A second strain gauge is fixedly connected inside the second detection groove. The shape of the second strain gauge matches the shape of the nozzle of the pre-stamped pipe fitting. The second strain gauge is electrically connected to the controller.

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