Automobile seat basin TEF and expansion pipe two-in-one forming machine and forming method

Abstract

The invention discloses an automobile seat basin TEF and expansion pipe two-in-one forming machine and a forming method.The automobile seat basin TEF and expansion pipe two-in-one forming machine comprises a pipe fitting feeding mechanism, a pipe fitting forming mechanism and a power mechanism, the pipe fitting feeding mechanism comprises a feeding structure and grabbing equipment, and the pipe fitting forming mechanism comprises a clamping die assembly, forming equipment and a sliding rail assembly; the power mechanism comprises a clamping power assembly and a forming power assembly, the feeding structure is an automatic pipe feeding machine, and the automatic pipe feeding machine transversely penetrates through the machine body frame. The automobile seat basin TEF and pipe expansion two-in-one forming method comprises the steps that S1, a pipe fitting is displaced to a containing area; S2, the pipe fitting in the containing area is positioned; S3, the pipe fitting is clamped; and S4, the pipe end is formed. Compared with the prior art, the automatic machining device has the beneficial effects that the pipe fittings are transferred through the automatic pipe fitting feeding device, the machining die device is matched with the oil cylinder stroke displacement assembly, the pipe fittings are automatically machined and controlled, and automatic machining of the TEF and the expanded pipe is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of forming machines, and in particular relates to a two-in-one forming machine and a forming method for a TEF (Transformer Efficiency Factor) and a tube expansion machine for an automobile seat pan. Background Art

[0002] In the field of automobile seat frame manufacturing, the core supporting structure of the seat pan assembly - TEF tube (Tubular End Forming, tube end forming parts) and expansion tube (Tube Expansion, hydraulic expansion tube fittings) are two types of key load-bearing components.

[0003] In traditional production processes, TEF tubes require specialized end-forming machines to perform local upsetting, flanging, or flattening on the tubes to facilitate assembly with connectors. Tube expansion, on the other hand, relies on independent hydraulic expanders, which use internal high-pressure fluid to radially expand the tube into the pre-set mold cavity, forming a three-dimensional curved surface. Due to differences in process principles, the two types of equipment have long operated separately, leading to the following technical pain points:

[0004] 1. Equipment redundancy and space occupation: Enterprises need to purchase TEF forming machines and tube expanders separately, which doubles the equipment investment cost. In addition, two independent hydraulic systems, control units, and safety protection facilities occupy valuable workshop space.

[0005] 2. Inefficient production coordination: Switching pipe types requires transferring workpieces across equipment, disrupting production cycles, increasing work-in-process inventory, and increasing logistics losses. Frequent changeovers, especially for small-batch, multi-batch orders, result in equipment utilization rates of less than 30%.

[0006] 3. Process compatibility limitations: Traditional TEF machines cannot provide the high-pressure sealing environment required for tube expansion, and tube expanders lack the rigid structure required for precise axial compression of tube ends. Some manufacturers have attempted to modify their equipment, but this presents technical risks such as oil line interference, mold conflict, and control system disruption.

[0007] 4. High maintenance complexity: The two independent hydraulic stations require regular replacement of differentiated seals and filter elements, resulting in fragmented fault diagnosis paths and increased maintenance costs.

[0008] Therefore, there is an urgent need to develop an integrated composite molding equipment to achieve seamless switching between TEF and tube expansion processes on a single platform to solve the technical problem of incompatibility between TEF and tube expansion processes in the current manufacturing system. Summary of the Invention

[0009] The object of the present invention is to provide a two-in-one automobile seat pan TEF and tube expansion molding machine and molding method to solve the above problems.

[0010] To achieve the above objectives, the present invention provides a two-in-one automobile seat basin TEF and tube expansion molding machine, comprising a machine body frame and a machine body fixing frame, including:

[0011] Pipe feeding mechanism: includes a feeding structure and a grabbing device, wherein the grabbing device is installed inside the feeding structure;

[0012] Pipe forming mechanism: including a clamping die assembly, a forming device and a slide rail assembly, wherein the clamping die assembly and the forming device are both mounted on the slide rail assembly;

[0013] Power mechanism: including a clamping power assembly and a molding power assembly, wherein the clamping power assembly is connected to the mold clamping assembly, and the molding power assembly is connected to the molding equipment;

[0014] The power mechanism drives the pipe forming mechanism to move along the slide rail assembly.

[0015] In one or more embodiments of the present invention, the loading structure is an automatic tube loading machine, which is placed transversely in the machine body frame and passes through the machine body frame.

[0016] In one or more embodiments of the present invention, the clamping mold assembly includes an upper clamping mold and a lower clamping mold, the upper clamping mold is provided with an upper clamping opening, and the lower clamping mold is provided with a lower clamping opening that matches the upper clamping opening.

[0017] In one or more embodiments of the present invention, the molding device is a molding die, and a tube expansion assembly is installed on the molding die.

[0018] In one or more embodiments of the present invention, the tube expansion assembly includes a tube expander and a tube expansion bead, and the tube expansion bead is installed on the tube expander.

[0019] In one or more embodiments of the present invention, the slide rail assembly includes upper and lower guide rails of the clamping mold and telescopic guide rails of the forming mold. The upper clamping mold is installed on the upper and lower guide rails of the clamping mold and moves longitudinally along the upper and lower guide rails of the clamping mold. The forming mold is installed on the telescopic guide rails of the forming mold and moves laterally along the telescopic guide rails of the forming mold.

[0020] In one or more embodiments of the present invention, the clamping power assembly includes a clamping oil cylinder and a spacer block cylinder, the clamping oil cylinder is connected to the upper clamping die, and the spacer block cylinder is connected to the spacer block installed between the lower clamping die.

[0021] In one or more embodiments of the present invention, the forming power assembly is a forming cylinder, the forming cylinder is fixedly connected to a machine body fixing frame, and the forming cylinder is connected to a forming mold.

[0022] In one or more embodiments of the present invention, a two-in-one TEF and tube expansion molding method for an automobile seat pan includes:

[0023] S1. Move the pipe fittings to the placement area:

[0024] The pipe is placed on the lower clamping mouth of the lower clamping die through the gripper mechanism inside the automatic pipe loading machine;

[0025] S2. Position the pipes in the placement area:

[0026] The pipe axial positioning lifting cylinders on both sides below the lower clamping die rise to the lower clamping die position to position the pipe fitting;

[0027] S3. Clamp the pipe fittings:

[0028] The upper clamping die is pushed downward along the upper and lower guide rails of the clamping die by the clamping oil cylinder, and the pipe fitting is clamped by the wedge assemblies on the upper and lower clamping dies;

[0029] S4, pipe end forming:

[0030] The forming die is pushed by the forming oil cylinder to move along the direction of the telescopic guide rail of the forming die, and the pipe fitting is formed by the expansion assembly on the forming die.

[0031] In one or more embodiments of the present invention, the wedge block assembly in S3 includes an upper wedge block and a lower wedge block, and the upper wedge block and the upper clamping mouth are fixedly connected to the upper clamping die and the lower clamping die respectively.

[0032] Compared with the prior art, the beneficial effect of the present invention is that the pipes are transferred by the automatic pipe feeding equipment, and the pipes are automatically processed and controlled by the processing mold equipment in conjunction with the cylinder stroke displacement assembly, thereby realizing the automatic processing of TEF and expansion tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is an isometric view of a two-in-one TEF and tube expansion forming machine for a car seat pan according to one embodiment of the present invention;

[0034] Figure 2 A top view of a two-in-one TEF and tube expansion forming machine for a car seat pan according to one embodiment of the present invention;

[0035] Figure 3 This is a first internal structural diagram of a two-in-one TEF and tube expansion forming machine for a car seat pan according to one embodiment of the present invention;

[0036] Figure 4 This is a second internal structural diagram of a two-in-one TEF and tube expansion forming machine for a car seat pan according to one embodiment of the present invention;

[0037] Figure 5 This is a structural diagram of the upper clamping die of a two-in-one TEF and tube expansion molding machine for a car seat basin in one embodiment of the present invention;

[0038] Figure 6 This is a structural diagram of the lower clamping die of a two-in-one TEF and tube expansion molding machine for a car seat pan in one embodiment of the present invention.

[0039] Figure 7 This is a structural diagram of a forming die of a two-in-one forming machine for forming a car seat basin TEF and tube expansion in one embodiment of the present invention;

[0040] Figure 8 Schematic diagram of a two-in-one TEF and tube expansion forming machine for a car seat pan according to one embodiment of the present invention;

[0041] Figure 9 Schematic diagram of the tube expansion of a two-in-one TEF and tube expansion machine for automobile seat pans in one embodiment of the present invention.

[0042] Description of main reference numerals:

[0043] 1-machine frame, 2-machine fixing frame, 201-image sensor, 202-forming cylinder displacement sensor, 3-automatic tube loading machine, 401-left pump control servo hydraulic station, 402-right pump control servo hydraulic station, 501-first forming cylinder, 502-second forming cylinder, 503-third forming cylinder, 504-fourth forming cylinder, 601-first clamping cylinder, 602-second clamping cylinder, 603 -The third clamping cylinder, 604-the fourth clamping cylinder, 7-the spacer cylinder, 701-the tube axial positioning lifting cylinder, 801-the upper clamping die, 8011-the upper wedge block, 8012-the upper clamping jaw, 802-the lower clamping die, 8021-the lower wedge block, 8022-the lower clamping jaw, 803-the forming die, 8031-the tube expander, 8032-the tube expansion bead, 901-the upper and lower guide rails of the clamping die, 902-the telescopic guide rails of the forming die. DETAILED DESCRIPTION

[0044] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0045] The present invention provides a two-in-one automobile seat pan TEF and tube expansion forming machine for integrating the dual processes of TEF and tube expansion. By adopting a modular symmetrical design, multiple groups of pipes can be processed simultaneously, and the placement and automatic processing of two types of pipes can be achieved in the same machine body without changing equipment. A high-strength welded machine body is formed by the combination of a machine body frame 1 and a machine body fixing frame 2. The machine body frame 1 is internally equipped with a pipe feeding mechanism, a pipe forming mechanism, and a power mechanism. The pipe feeding mechanism uses existing technology to automatically place the pipes to be processed. The pipe forming mechanism is used to process the ends of the TEF and the tube expansion. The power mechanism is used to provide operating power and simultaneously drive the forming mechanism to move.

[0046] The pipe loading mechanism includes a loading structure and a gripping device, which is installed inside the loading structure. The loading structure is an automatic pipe loader 3, which uses existing technology. The automatic pipe loader 3 is equipped with a temporary pipe storage bin and a gripping robot. The gripping robot automatically places the pipes. The automatic pipe loader 3 is placed horizontally within the machine frame 1 and passes through the machine frame 1. The automatic pipe loader 3 is installed in the middle position of the machine frame 1 and is coaxial with the clamping assembly. The automatic pipe loader 3 cooperates with the clamping assembly to achieve the placement of the pipes.

[0047] Pipe fitting forming mechanism: includes a clamping die assembly, a forming device and a slide rail assembly. The clamping die assembly is used to clamp the pipe fitting and clamp the pipe fitting through the inclined wedge assembly inside it. The forming device is used to support both ends of the pipe fitting and process the pipe fitting. The slide rail assembly is used to displace the clamping die assembly and the forming device. The clamping die assembly and the forming device are both installed on the slide rail assembly. The clamping die assembly and the forming device fix, process and release the limit of the pipe fitting through the displacement of the slide rail assembly.

[0048] The clamping die assembly clamps the pipe fittings through the wedge assembly. The clamping die assembly includes an upper clamping die 801 and a lower clamping die 802. The upper clamping die 801 is located above the lower clamping die 802. The upper clamping die 801 is provided with an upper clamping opening 8012, and the lower clamping die 802 is provided with a lower clamping opening 8022 that cooperates with the upper clamping opening 8012. The pipe fittings are fixed by clamping the upper clamping opening 8012 and the lower clamping opening 8022. A rubber gasket is provided on the lower clamping die 802 to enhance friction and improve the effect of fixing the pipe fittings while preventing scratches.

[0049] The wedge assembly in S3 includes an upper wedge 8011 and a lower wedge 8021. The upper wedge 8011 and upper clamping opening 8012 are fixedly connected to the upper clamping die 801 and the lower clamping die 802, respectively. The pipe fitting is placed in the lower clamping opening 8022 of the bottom lower clamping die 802. The upper clamping die 801 moves downward along the clamping die upper and lower guide rails 901. During this process, the upper wedge 8011 on the upper pipe clamping die 801 contacts the lower wedge 8021 on the lower pipe clamping die 802. The inclined wedge structure forces the lower pipe clamping die 802 to move, ultimately achieving precise clamping of the pipe fitting. The forming cylinder then pushes the forming die 803 along the forming die telescopic guide rails 902, expanding the pipe fitting.

[0050] The angle between the upper wedge block 8011 and the lower wedge block 8021 is generally between 15° and 25°. When the angle is less than 15°, the upper wedge block 8011 and the lower wedge block 8021 are prone to becoming stuck. When the angle is greater than 25°, the upper wedge block 8011 and the lower wedge block 8021 experience insufficient horizontal thrust. As the clamping cylinder pushes the upper clamping die 801 downward, the upper wedge block 8011 gradually approaches the lower clamping die 802. After the upper wedge block 8011 contacts the lower wedge block 8021, it gradually compresses the pipe fitting. Through the vertical displacement of the upper clamping die 801, i.e., the downward movement of the upper die, the lower clamping die 802 is pressed against the contact of the wedge surfaces, thereby converting the vertical displacement into horizontal motion. This pushes the lower clamping die 802 to slide, completing the clamping of the pipe fitting.

[0051] The forming equipment is a forming die 803, which is used to expand the pipe. The forming die 803 is equipped with an expansion assembly, which is attached to the punch at the end of the forming die 803. The expansion assembly is used to upset or flanging the pipe end. The expansion assembly includes an expander 8031 ​​and expansion beads 8032, which are mounted on the expander 8031. The expander 8031 ​​is inserted into the inner wall of the pipe lumen, and the expansion beads 8032 expand radially under pressure. The forming pressure is steplessly adjustable from 30 to 150 MPa.

[0052] The slide rail assembly is used to displace the upper clamping mold 801, the lower clamping mold 802 and the forming mold 803. The slide rail assembly includes the clamping mold upper and lower guide rails 901 and the forming mold telescopic guide rails 902. The upper clamping mold 801 and the lower clamping mold 802 are installed on the clamping mold upper and lower guide rails 901 and displace longitudinally along the clamping mold upper and lower guide rails 901. The forming mold 803 is installed on the forming mold telescopic guide rails 902 and displaces laterally along the forming mold telescopic guide rails 902. The clamping mold upper and lower guide rails 901 are installed on the spacer block in the middle position of the clamping mold.

[0053] The power mechanism includes a clamping power assembly and a forming power assembly. The clamping power assembly is used to move the upper clamping die 801 along the upper and lower guide rails 901, securing and releasing the pipe during displacement. The forming power assembly is used to push the forming die 803 for processing, achieving precise processing control through the cooperation of the image sensor 201 and the forming cylinder displacement sensor 202. The clamping power assembly is connected to the clamping die assembly, and the forming power assembly is connected to the forming equipment.

[0054] The power mechanism propels the pipe forming mechanism to move along the slide rail assembly. The forming power assembly is a forming cylinder, which is fixedly connected to the machine body fixed frame 2. One end of the forming cylinder is connected to the forming die 803. The forming cylinder includes a first forming cylinder 501, a second forming cylinder 502, a third forming cylinder 503, and a fourth forming cylinder 504. These cylinders can simultaneously perform multiple sets of movements. The forming cylinders propel the forming die 803 along the direction of the forming die telescopic guide rail 902 to perform the processing operation. During the forming process, the forming cylinders cooperate with the image sensor 201 and the forming cylinder displacement sensor 202. The image sensor 201 and the forming cylinder displacement sensor 202 are connected to the control system. The image sensor 201 scans the coordinates of the lower clamp 8022. The robotic arm in the automatic pipe loading machine 3 places the pipe with an accuracy of ±0.3mm. The forming cylinder displacement sensor 202 detects the displacement distance of the forming cylinder in real time. If the deviation exceeds ±0.15mm, an automatic alarm is issued.

[0055] The operation accuracy of the forming cylinder is controlled by the cooperation of the image sensor 201 and the forming cylinder displacement sensor 202 .

[0056] The clamping power assembly includes a clamping cylinder and a spacer block cylinder. The clamping cylinder is connected to the upper clamping die (801). The clamping cylinder includes a first clamping cylinder 601, a second clamping cylinder 602, a third clamping cylinder 603 and a fourth clamping cylinder 604. Multiple clamping cylinders can move synchronously. The clamping cylinder pushes the upper clamping die 801 to move vertically along the direction of the upper and lower guide rails 901 of the clamping die, and cooperates with the inclined wedge assembly to clamp and release the limit of the pipe fitting. The spacer block cylinder is connected to the spacer block installed between the lower clamping die 802. The spacer block cylinder can push the spacer block to move longitudinally, which is convenient for positioning and demolding the pipe fitting.

[0057] The two-in-one TEF and tube expansion forming method for automobile seat basins includes: S1, displacement of pipe fittings to the placement area: the pipe fittings are placed on the lower clamping opening 8022 of the lower clamping die 802 by the gripper mechanism inside the automatic pipe loading machine 3, the automatic pipe loading machine 3 receives the command to grab the pipe fittings of specified specifications, the image sensor 201 scans the coordinate position of the lower clamping opening 8022, the robotic arm places the pipe fittings with an accuracy of ±0.3mm, and the pipe axial positioning lifting cylinder 701 rises to press the two ends of the pipe fitting to complete the positioning; S2, positioning the pipe fittings in the placement area: the pipe axial positioning lifting cylinders 701 on both sides below the lower clamping die 802 rise to the position of the lower clamping die 802 to position the pipe fittings, the clamping cylinders act synchronously to push the upper clamping die 801 Move downward along the upper and lower guide rails 901 of the clamping die, the upper wedge 8011 and the lower clamp 8022 engage, and a uniform clamping force is generated by increasing the mechanism through the inclined surface; S3, clamping the pipe fittings: the upper clamping die 801 is pushed downward along the upper and lower guide rails 901 of the clamping die by the clamping cylinder, and the pipe fittings are clamped by the wedge assembly on the upper clamping die 801 and the lower clamping die 802; S4, pipe end forming: the forming die 803 is pushed to move along the direction of the forming die telescopic guide rail 902 by the forming cylinder, and the pipe fittings are formed by the expansion assembly on the forming die 803. The cylinder pushes back the remote clamping die assembly to open, and the automatic pipe loading machine 3 works together to take out the formed pipe fittings, which are then diverted to the finished product area after visual quality inspection.

[0058] Compared with existing technologies, the two-in-one TEF and tube expansion molding machine and molding method for automobile seat pans successfully integrates the dual processes of TEF and tube expansion through innovative structural design and intelligent control systems, bringing breakthrough improvements to the manufacturing of automobile seat pan pipe fittings. The core advantages are as follows: 1. Significant cost reduction and efficiency improvement By replacing two dedicated machines with a single device, procurement costs are reduced by approximately 40%, saving more than 50% of plant area. The production cycle is shortened, and the integrated design eliminates the workpiece transfer link. The mold change time is shortened from the original 30 minutes to within 3 minutes, and the overall production efficiency is improved by more than 35%. 2. A breakthrough in process adaptability. Through the dual-mode collaborative oil system and the unique time-sharing multiplexing hydraulic circuit, the cylinder can output high-rigidity thrust (>500 tons) to complete TEF cold extrusion, and can also switch to ultra-high pressure mode (≥150MPa) to achieve tube expansion plastic molding. Through the intelligent mold library, the modular clamping mold group supports pneumatic quick change, which is compatible with the pipe diameter range of φ20-φ60mm. It can process different materials such as carbon steel and high-strength aluminum, covering more than 90% of passenger car seat pan tube types, and meeting the use requirements in production and processing. 3. Improved precision and quality, through closed-loop control to ensure the built-in high-precision displacement sensor and pressure transmitter, and real-time feedback on the molding process. The axial deformation error is controlled to ≤0.1mm in the TEF stage, and the wall thickness thinning rate fluctuation in the tube expansion stage is <5%, and the product qualification rate is increased to 99.5%. Through the visual operation interface, the Siemens PLC is controlled to realize automated processing. Secondary damage is eliminated through PLC control, and single-machine continuous molding avoids surface scratches and deformation caused by workpiece handling, especially to ensure the integrity of the micro-crack sensitive area of ​​high-strength steel pipe fittings. 4. Intelligent operation and maintenance upgrades utilize a unified control platform, including the CPU1511-1PN PLC, 6ES7131-6BF01-0BA0 digital input module, 6ES7132-6BF01-0BA0 digital output module, 6ES7134-6GB00-0BA1 analog input module, and the SIMATIC HMI TP700 COMFORT touch screen, to achieve automated processing. 5. Contributing to green manufacturing, noise optimization reduces the noise level of the enclosed booster unit by 15dB(A) compared to traditional tube expanders, improving the working environment. The two-in-one TEF and tube expansion forming machine for automotive seat pans redefines the manufacturing paradigm for seat pan pipe fittings, providing automotive manufacturers and parts suppliers with highly flexible, low-energy advanced manufacturing solutions and contributing to industry upgrades.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A two-in-one car seat basin TEF and tube expansion forming machine, comprising a machine frame and a machine fixing frame, characterized in that: include: Pipe feeding mechanism: includes a feeding structure and a grabbing device, wherein the grabbing device is installed inside the feeding structure; Pipe forming mechanism: including a clamping die assembly, a forming device and a slide rail assembly, wherein the clamping die assembly and the forming device are both mounted on the slide rail assembly; Power mechanism: including a clamping power assembly and a molding power assembly, wherein the clamping power assembly is connected to the mold clamping assembly, and the molding power assembly is connected to the molding equipment; The power mechanism drives the pipe forming mechanism to move along the slide rail assembly.

2. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 1, characterized in that: The feeding structure is an automatic tube loading machine, which is placed transversely in the machine body frame and passes through the machine body frame.

3. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 1, characterized in that: The clamping die assembly comprises an upper clamping die and a lower clamping die. The upper clamping die is provided with an upper clamping opening, and the lower clamping die is provided with a lower clamping opening matched with the upper clamping opening.

4. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 1, characterized in that: The forming equipment is a forming die, and a tube expansion assembly is installed on the forming die.

5. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 4, characterized in that: The tube expansion assembly includes a tube expander and a tube expansion bead, and the tube expansion bead is installed on the tube expander.

6. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 3, characterized in that: The slide rail assembly includes upper and lower guide rails for the clamping mold and telescopic guide rails for the forming mold. The upper clamping mold is installed on the upper and lower guide rails for the clamping mold and moves longitudinally along the upper and lower guide rails for the clamping mold. The forming mold is installed on the telescopic guide rails for the forming mold and moves laterally along the telescopic guide rails for the forming mold.

7. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 1, characterized in that: The clamping power assembly includes a clamping oil cylinder and a spacer block cylinder. The clamping oil cylinder is connected to the upper clamping die, and the spacer block cylinder is connected to the spacer block installed between the lower clamping die.

8. The automobile seat basin TEF and tube expansion two-in-one forming machine according to claim 1, characterized in that: The forming power component is a forming oil cylinder, which is fixedly connected to a machine body fixing frame and is connected to a forming die.

9. A two-in-one forming method for a car seat pan using TEF and tube expansion, using the two-in-one forming machine for a car seat pan using TEF and tube expansion as described in any one of claims 1 to 8, characterized in that: include: S1. Displacement of pipe fittings to the placement area: The pipe is placed on the lower clamping mouth of the lower clamping die through the gripper mechanism inside the automatic pipe loading machine; S2. Position the pipes in the placement area: The pipe axial positioning lifting cylinders on both sides below the lower clamping die rise to the lower clamping die position to position the pipe fitting; S3. Clamp the pipe fittings: The upper clamping die is pushed downward along the upper and lower guide rails of the clamping die by the clamping oil cylinder, and the pipe fitting is clamped by the wedge assemblies on the upper and lower clamping dies; S4, pipe end forming: The forming die is pushed by the forming oil cylinder to move along the direction of the telescopic guide rail of the forming die, and the pipe fitting is formed by the expansion assembly on the forming die.

10. The automobile seat basin TEF and tube expansion two-in-one molding method according to claim 9, characterized in that: The wedge block assembly in S3 includes an upper wedge block and a lower wedge block, and the upper wedge block and the upper clamping mouth are fixedly connected to the upper clamping die and the lower clamping die respectively.

Images