End cover of automobile chassis air suspension device and forming machining equipment of end cover

Abstract

The utility model provides an end cover of an air suspension device of an automobile chassis and forming processing equipment of the end cover, and the forming processing equipment comprises a deep drawing die, a tensioning assembly and a rolling assembly, the deep drawing die is used for drawing and forming a cylindrical blank with a port to obtain a cup-shaped part with an inclined sealing surface at the end part; the tensioning assembly comprises a plurality of split dies, a tensioning mechanism and a core rod, and the plurality of split dies are arranged in the inner concave cavity; the tensioning mechanism is connected with the core rod and used for pushing the multiple petal dies to move in the radial direction of the inner concave cavity and to be tensioned in the inner concave cavity. The core rod can rotate; the rolling assembly comprises a rolling wheel and a pushing mechanism, the axis of the rolling wheel is parallel to the axis of the core rod, and the pushing mechanism is used for pushing the rolling wheel to make contact with the edge of the outer wall of the port and carrying out progressive rolling forming to obtain the reducing part. And the end cover is clamped and fixed by tensioning from the interior of the inner concave cavity through the multiple petal dies, so that the deformation of the outer wall is avoided, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, and in particular to an end cap for an automotive chassis air suspension device and its forming processing equipment. Background Technology

[0002] An automotive air suspension system is a suspension system that uses air springs instead of traditional springs. It adjusts the suspension stiffness by regulating the air pressure within the air springs, thus adapting to different driving conditions and load requirements. This system offers better comfort, stability, and handling. The end cap is a key component of the air suspension system. Its main function is to protect the internal mechanisms of the air springs, shielding them from impacts and collisions. It also protects the internal structure of the air springs from damage caused by external factors (such as rain, mud, etc.). These end caps are typically made of high-strength, corrosion-resistant materials, such as low-alloy steel and stainless steel, to ensure stable performance in harsh environments. The manufacturing process of the end caps includes blanking, stamping, machining, and surface treatment. Among these, stamping and machining are particularly important because they directly affect the precision and sealing performance of the end caps.

[0003] In the prior art, ordinary end caps are generally cylindrical and can be machined by clamping the outer wall. However, the end caps of automobile chassis air suspension devices are generally irregularly shaped due to the relatively small installation space and the need to avoid some structural components. Therefore, the method of clamping the outer wall can easily cause deformation of the outer wall, affecting the quality of the product. Utility Model Content

[0004] In view of this, the present invention proposes an end cap for an air suspension device for an automobile chassis and its forming and processing equipment, in order to solve the technical problem mentioned in the background art that the outer wall is easily deformed by clamping the outer wall, which affects the quality of the product.

[0005] The technical solution of this utility model is implemented as follows:

[0006] In a first aspect, this utility model provides a forming and processing equipment for an end cap of an automotive chassis air suspension device. The end cap includes a cylindrical section, a spherical section, and a beveled cover. One end of the cylindrical section has a port, and the other end is connected to the spherical section. The outer wall of the port has a reduced diameter portion, and the inner wall of the cylindrical section, excluding the reduced diameter portion, has a concave cavity. The top of the spherical section has a closed plane. The beveled cover is inclinedly disposed on the cylindrical section and the spherical section. The forming and processing equipment includes a drawing die, a tensioning assembly, and a rolling assembly, wherein:

[0007] The drawing die is used to punch strip material to obtain a circular deep-drawn blank, and then deep-draw the circular blank to obtain a cup-shaped preform with the beveled top. A composite stamping-blanking die is preferred; as the upper die of the composite die descends, the blanking edge first contacts the strip material, and as the upper die descends, it is stamped and blanked to obtain a circular blank. The continuing downward-moving drawing punch then stamps and draws the circular blank to obtain a preform with a beveled top.

[0008] The tensioning assembly includes multiple valve molds, a tensioning mechanism, and a mandrel. The multiple valve molds are placed in the concave cavity. The tensioning mechanism is connected to the mandrel and is used to push the multiple valve molds to move radially along the concave cavity and tension them within the concave cavity. The mandrel is rotatable.

[0009] The rolling assembly includes a rolling roller and a propulsion mechanism. The axis of the rolling roller is parallel to the axis of the mandrel. The propulsion mechanism is used to propel the rolling roller to contact the outer wall edge of the port and progressively roll-form the reduced diameter portion.

[0010] Based on the above technical solutions, preferably, the tensioning mechanism includes a frustum and a telescopic cylinder; the side of the petal mold away from the cavity wall of the concave cavity is provided with a tapered hole that matches the outer wall of the frustum; the frustum is placed in the tapered hole and is used to push multiple petal molds to move radially along the concave cavity and tension them in the concave cavity; the telescopic cylinder is installed in the mandrel and connected to the frustum.

[0011] Based on the above technical solutions, preferably, a turning device is also included, which is used to turn one end of the port to achieve accurate end cap dimensions.

[0012] Based on the above technical solutions, preferably, it also includes an ultrasonic cleaning device, which is used to perform ultrasonic cleaning on the end cap after turning to remove metal residue.

[0013] Secondly, this utility model provides an end cover for an air suspension device for an automobile chassis, comprising a cylindrical section, a spherical section, and a beveled cover. One end of the cylindrical section is provided with a port, and the other end is connected to the spherical section. The outer wall of the port is provided with a reduced diameter portion, and the inner wall of the cylindrical section excluding the reduced diameter portion is provided with a concave cavity. The top of the spherical section is provided with a closed plane, and the beveled cover is inclinedly disposed on the cylindrical section and the spherical section.

[0014] Based on the above technical solutions, preferably, the spherical segment is a part of a hemisphere, and the closed plane is parallel to the end face of the cylindrical segment.

[0015] Based on the above technical solutions, preferably, the inclined cover is connected to the cylindrical segment and the spherical segment by a transition fillet.

[0016] The end cap of the automobile chassis air suspension device and its forming and processing equipment of this utility model have the following advantages over the prior art:

[0017] (1) Multiple ferrules are placed in the concave cavity. The tensioning mechanism pushes the multiple ferrules to move radially along the concave cavity and tensions them in the concave cavity. While the mandrel rotates, the pushing mechanism pushes the roller to contact the outer wall edge of the port and gradually roll-forms the reduced diameter part. The end cap is clamped and fixed by the multiple ferrules from the inside of the concave cavity to prevent deformation of the outer wall and improve the quality of the product.

[0018] (2) A tapered hole matching the outer wall of the frustum is provided on the side of the cavity wall away from the concave cavity through the petal mold; the frustum is placed in the tapered hole, and the telescopic cylinder drives the frustum to move along the axial direction of the concave cavity. The frustum pushes multiple petal molds to move radially along the concave cavity and tightens them in the concave cavity. This structure is simple and reliable, and the petal molds are easy to pick up and put in the concave cavity. The device is convenient and easy to operate.

[0019] (3) The port end is machined by a turning device to remove the previously reserved machining allowance in order to achieve accurate end cap size and improve product quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Fig. 1 This is a schematic diagram of the structure of the end cover of the automobile chassis air suspension device of this utility model;

[0022] Fig. 2 This is a schematic cross-sectional view of the stamped preform of the end cap of the automobile chassis air suspension device of this utility model during the processing.

[0023] Fig. 3 This is a schematic diagram of the tensioning assembly and rolling assembly of the forming equipment for the end cover of the automobile chassis air suspension device of this utility model.

[0024] Fig. 4This is a schematic diagram of the turning device of the forming and processing equipment for the end cover of the automobile chassis air suspension device of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1-tensioning assembly, 2-roller assembly, 3-turning device;

[0026] 100-End cap, 110-Cylindrical section, 1101-Port, 1102-Reduced diameter section, 1103-Concave cavity, 120-Spherical section, 1201-Closed plane, 130-Slanted cover, 140-Transition fillet;

[0027] 11-Flap mold, 111-Conical hole, 12-Tensioning mechanism, 121-Frustum component, 122-Telescopic cylinder, 13-Mandrel;

[0028] 21-Roller;

[0029] 31-Cut blade. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] Reference Figs. 1-4 As shown in the first aspect of this utility model, an end cap for an air suspension device for an automobile chassis is provided, comprising a cylindrical segment 110, a spherical segment 120, and a beveled cover 130. One end of the cylindrical segment 110 has a port 1101, and the other end is connected to the spherical segment 120. The outer wall of the port 1101 has a reduced diameter portion 1102, and the inner wall of the cylindrical segment 110, excluding the reduced diameter portion 1102, has an inner cavity 1103. The axis of the spherical segment 120 is collinear with the axis of the cylindrical segment 110, and the top of the spherical segment 120 has a closed plane 1201. The beveled cover 130 is inclinedly disposed on the cylindrical segment 110 and the spherical segment 120. The beveled cover 130 is connected to the cylindrical segment 110 and the spherical segment 120, and forms a certain angle with the axial direction of the cylindrical segment 110.

[0032] In some embodiments, the spherical segment 120 is a part of a hemisphere, and the closed plane 1201 is parallel to the end face of the cylindrical segment 110. The spherical segment 120 is a structure obtained by cutting off the upper and lower parts of a hemisphere and retaining the middle part. The closed plane 1201 is located on the side of the spherical segment 120 away from the center of the sphere, and the side of the spherical segment 120 near the center of the sphere is connected to the cylindrical segment 110.

[0033] In some embodiments, the beveled cover 130 is connected to the cylindrical segment 110 and the spherical segment 120 by a transition fillet 140. Connecting the beveled cover 130 and the cylindrical segment 110, and the beveled cover 130 and the spherical segment 120 by the transition fillet 140 avoids stress concentration at the connection, improves the strength of the end cap 100, and thus improves the reliability of the end cap 100.

[0034] Based on the same concept, a second aspect of this utility model provides a forming and processing equipment for an end cap of an automotive chassis air suspension device, used to process the end cap 100 in the first aspect embodiment. The forming and processing equipment includes a drawing die, a tensioning assembly 1, and a rolling assembly 2, wherein:

[0035] The drawing die is used to draw a cylindrical blank with the port 1101 into a cup-shaped part with the inclined cover 130 at the end; the drawing die preferably adopts a compound stamping-blanking die. As the upper die of the compound die moves down, the blanking edge first contacts the strip. As the upper die moves down, the blanking is stamped to obtain a round blank. The drawing punch continues to move down to stamp and draw the round blank to obtain a pre-formed part with the inclined cover 130.

[0036] The tensioning assembly 1 includes multiple valve molds 11, a tensioning mechanism 12, and a mandrel 13. The multiple valve molds 11 are placed in the concave cavity 1103. The tensioning mechanism 12 is connected to the mandrel 13 and is used to push the multiple valve molds 11 to move radially along the concave cavity 1103 and to tension them in the concave cavity 1103. The mandrel 13 is rotatable.

[0037] The rolling assembly 2 includes a rolling roller 21 and a pushing mechanism. The axis of the rolling roller 21 is parallel to the axis of the mandrel 13. The pushing mechanism is used to push the rolling roller 21 into contact with the outer wall edge of the port 1101 and progressively roll-form the reduced diameter portion 1102. The pushing mechanism can be a cylinder, which directly drives the rolling roller 21.

[0038] It should be noted that the valve mold 11 only contacts the cylindrical section 110 in the concave cavity 1103 and does not contact the inclined cover 130. The mandrel 13 will only rotate after the valve mold 11 is tightened and fixed in the concave cavity 1103.

[0039] The forming and processing equipment for the end cover of the automobile chassis air suspension device proposed in this embodiment uses multiple petal molds 11 placed in the concave cavity 1103. The tensioning mechanism 12 pushes the multiple petal molds 11 to move radially along the concave cavity 1103 and tension them in the concave cavity 1103. While the mandrel 13 rotates, the pushing mechanism pushes the roller 21 to contact the outer wall edge of the port 1101 and gradually roll-forms the reduced diameter portion 1102. The end cover 100 is clamped and fixed by the multiple petal molds 11 from the inside of the concave cavity 1103, avoiding deformation of the outer wall and improving the quality of the product.

[0040] In some embodiments, the tensioning mechanism 12 includes a frustum 121 and a telescopic cylinder 122; the side of the valve mold 11 away from the cavity wall of the concave cavity 1103 is provided with a tapered hole 111 that matches the outer wall of the frustum 121; the frustum 121 is placed in the tapered hole 111 to push the plurality of valve molds 11 to move radially along the concave cavity 1103 and to tension the concave cavity 1103; the telescopic cylinder 122 is installed in the mandrel 13 and connected to the frustum 121. A tapered hole 111 matching the outer wall of the frustum 121 is provided on the side of the valve 11 away from the cavity wall of the concave cavity 1103. The frustum 121 is placed in the tapered hole 111. The telescopic cylinder 122 drives the frustum 121 to move along the axial direction of the concave cavity 1103. The frustum 121 pushes multiple valves 11 to move radially along the concave cavity 1103 and tightens them in the concave cavity 1103. This structure is simple and reliable, and the valves 11 are easy to put into and take out in the concave cavity 1103. The device is convenient and easy to operate.

[0041] In some embodiments, the forming processing equipment further includes a blanking device for blanking a solid cylindrical blank to obtain a cylindrical blank with a port 1101. The blanking device blanks a solid cylindrical blank to obtain a cylindrical blank with a port 1101, which is then used for drawing by a deep drawing die.

[0042] In some embodiments, to ensure machining dimensions, a certain machining allowance is typically reserved for cylindrical blanks. To remove this machining allowance, the forming processing equipment further includes a turning device 3. The turning device 3 is used to turn one end of the port 1101 to achieve precise end cap 100 dimensions. By turning one end of the port 1101 with the turning device 3, the previously reserved machining allowance is removed, thereby achieving precise end cap 100 dimensions and improving product quality.

[0043] In some embodiments, the forming processing equipment further includes an ultrasonic cleaning device for ultrasonically cleaning the turned end cap 100 to remove metal residues.

[0044] The working principle of the forming and processing equipment for the end caps of the automobile chassis air suspension device is as follows:

[0045] First, a solid cylindrical blank is punched and blanked by a stamping blanking device to obtain a cylindrical preform with port 1101. Then, it is drawn by a deep drawing die to obtain a cup-shaped part with a beveled end, which is a semi-finished part A.

[0046] The semi-finished part is fitted onto multiple petal molds 11, and the output shaft of the cylinder is controlled to contract to expand the multiple petal molds 11 and tighten the semi-finished part A.

[0047] The mandrel 13 is rotated, and the roller 21 is pushed to contact the edge of the semi-finished part, and the part is gradually rolled to form the reduced diameter part 1102.

[0048] After reaching the rolling size, the rolling roller retracts, the mandrel 13 stops rotating, the output shaft of the cylinder extends, and the cone 121 is pushed forward, causing the petal mold 11 to shrink towards the center, and the semi-finished part B after spinning is removed.

[0049] Change the workstation, use an external chuck to clamp the outer circle of the semi-finished part on the turning device 3, rotate the semi-finished part, feed the cutting tool 31, process the end cap 100 to the specified precise size, and obtain the finished part;

[0050] Finished parts undergo ultrasonic cleaning to ensure that there are no metal residues on the surface.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A forming and processing equipment for end caps of an automotive chassis air suspension device, characterized in that, The end cap includes a cylindrical section, a spherical section, and a beveled cover. One end of the cylindrical section has a port, and the other end connects to the spherical section. The outer wall of the port has a reduced diameter portion, and the inner wall of the cylindrical section, excluding the reduced diameter portion, has a concave cavity. The top of the spherical section has a closed plane. The beveled cover is inclinedly disposed on the cylindrical section and the spherical section. The forming processing equipment includes a deep drawing die, a tensioning assembly, and a rolling assembly, wherein: The deep drawing die is used to draw a cylindrical blank with the port into a cup-shaped part with the beveled end. The tensioning assembly includes multiple valve molds, a tensioning mechanism, and a mandrel. The multiple valve molds are placed in the concave cavity. The tensioning mechanism is connected to the mandrel and is used to push the multiple valve molds to move radially along the concave cavity and tension them within the concave cavity. The mandrel is rotatable. The rolling assembly includes a rolling roller and a propulsion mechanism. The axis of the rolling roller is parallel to the axis of the mandrel. The propulsion mechanism is used to propel the rolling roller to contact the outer wall edge of the port and progressively roll-form the reduced diameter portion.

2. The forming and processing equipment for the end cover of the automobile chassis air suspension device as described in claim 1, characterized in that, The tensioning mechanism includes a frustum and a telescopic cylinder; the side of the valve mold away from the cavity wall of the concave cavity is provided with a tapered hole that matches the outer wall of the frustum; the frustum is placed in the tapered hole and is used to push multiple valve molds to move radially along the concave cavity and tension them in the concave cavity; the telescopic cylinder is installed in the mandrel and connected to the frustum.

3. The forming and processing equipment for the end cover of the automobile chassis air suspension device as described in claim 1, characterized in that, It also includes a blanking device for blanking solid cylindrical blanks to obtain cylindrical blanks with ports.

4. The forming and processing equipment for the end cover of the automobile chassis air suspension device as described in claim 1, characterized in that, It also includes a turning device for turning one end of the port to achieve precise end cap dimensions.

5. The forming and processing equipment for the end cover of the automobile chassis air suspension device as described in claim 1, characterized in that, It also includes an ultrasonic cleaning device, which is used to ultrasonically clean the machined end caps to remove metal residue.

6. An end cap for an air suspension device for an automobile chassis, characterized in that, It includes a cylindrical segment, a spherical segment, and a beveled cover. One end of the cylindrical segment is provided with a port, and the other end is connected to the spherical segment. The outer wall of the port is provided with a reduced diameter portion, and the inner wall of the cylindrical segment excluding the reduced diameter portion is provided with a concave cavity. The top of the spherical segment is provided with a closed plane, and the beveled cover is inclinedly disposed on the cylindrical segment and the spherical segment.

7. The end cap of the automobile chassis air suspension device as described in claim 6, characterized in that, The spherical segment is part of a hemisphere, and the closed plane is parallel to the end face of the cylindrical segment.

8. The end cap of the automobile chassis air suspension device as described in claim 7, characterized in that, The sloping cover is connected to the cylindrical section and the spherical section by a transition fillet.

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