Production process of torsion beam assembly without end milling

Abstract

The present invention relates to the technical field of automotive parts, and specifically discloses a production process for a torsion beam assembly without end milling, comprising the following process steps: Step 1: Welding a sleeve and a wheel hub mounting bracket to a longitudinal arm to form a longitudinal arm assembly, wherein the wheel hub mounting bracket is welded with a bracket reinforcement plate on the inner end face of the wheel hub mounting bracket before being welded to the longitudinal arm, and a top section of the longitudinal arm facing the wheel hub mounting bracket is concave; Step 2: First assemble the longitudinal arm assembly and the crossbeam and then weld them, positioning and clamping the sleeve position of the longitudinal arm assembly using a sleeve fixture before welding, and simultaneously positioning and clamping the wheel hub mounting bracket from both the inner and outer end faces of the wheel hub mounting bracket using a wheel hub fixture. This solution is used to solve the problems of high production cost and low production efficiency in the prior art where end milling is required for a torsion beam assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a production process for a torsion beam assembly without end milling. Background Art

[0002] The torsion beam assembly includes a crossbeam and two longitudinal arms, each of which is equipped with a sleeve, a wheel hub mounting bracket, a spring mounting plate, etc. The wheel hub mounting bracket needs to be welded with a bracket reinforcement plate on the outside of the wheel hub mounting bracket to ensure the connection strength with the automobile wheel hub. The thickness of the material used for the bracket reinforcement plate needs to be higher than the design size to ensure the toe and camber requirements of the torsion beam assembly after end milling the bracket reinforcement plate. However, the end milling process set up to improve the accuracy of the torsion beam assembly requires additional milling equipment, milling stations and post-milling grinding stations, which greatly increases the production cost of the torsion beam assembly and low production efficiency.

[0003] The inventors have found that in the prior art, the bracket reinforcement plate is basically welded to the outside of the wheel hub mounting bracket. The most critical factor is that the existing welding process cannot ensure that the deformation is controlled within the product design tolerance range, so the bracket reinforcement plate installed on the outside is used and end milling is performed to ensure the product accuracy of the torsion beam assembly; but there are other factors. For example, the bracket reinforcement plate is set on the outside of the wheel hub mounting bracket, which enables the welding process of the bracket reinforcement plate and the wheel hub mounting bracket to be adjusted according to the actual situation of the factory to adjust the processing sequence of the torsion beam assembly.

[0004] A major factor affecting the large amount of welding deformation is the setting of the fixture. When welding the crossbeam and the longitudinal arm assembly, the fixture is respectively positioned on the sleeve and the wheel hub mounting bracket at the two ends of the longitudinal arm. However, during the welding process of the crossbeam and the longitudinal arm assembly, the high heat generated by welding will be transmitted along the length direction of the crossbeam and the longitudinal arm, making the temperature of the longitudinal arm itself, the crossbeam itself and the area enclosed by the longitudinal arm and the crossbeam very high. The fixture is easily affected by the temperature, which affects the clamping ability and service life; in order to take into account the convenience of installation and removal of the torsion beam assembly and reduce the influence of temperature, the fixture is installed in the The wheel hub fixture is designed to position the outside of the wheel hub mounting bracket and clamp it from the inside of the wheel hub mounting bracket for clamping and positioning. However, because a bracket reinforcement plate is installed on the outside of the wheel hub mounting bracket, the outer positioning surface can only be the end face of the bracket reinforcement plate. The size of this end face is small, which is not conducive to the accuracy of positioning, and is also not conducive to the control of welding deformation. As a result, end milling of the bracket reinforcement plate becomes an indispensable process, and the problems of high production cost and low production efficiency caused by end milling have not been solved. Summary of the Invention

[0005] The present invention aims to provide a production process for a torsion beam assembly without end milling, so as to solve the problems of high production cost and low production efficiency in the prior art where the torsion beam assembly needs to be end milled.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The production process of the torsion beam assembly without end milling includes the following process steps:

[0008] Step 1: Weld the sleeve and the wheel hub mounting bracket to the trailing arm to form a trailing arm assembly. Before welding the wheel hub mounting bracket to the trailing arm, weld a bracket reinforcement plate to the inner end surface of the wheel hub mounting bracket. The top section of the trailing arm facing the wheel hub mounting bracket is concave.

[0009] Step 2: Assemble the trailing arm assembly and the crossbeam before welding. Before welding, use the sleeve fixture to position and clamp the sleeve position of the trailing arm assembly. Use the wheel hub fixture to position and clamp the wheel hub mounting bracket from both the inner and outer end faces of the wheel hub mounting bracket.

[0010] The principle and advantages of this solution are as follows: in actual application, the bracket reinforcement plate is moved from the original outer end face of the wheel hub mounting bracket to the inner end face, so that the wheel hub fixture positions the outer end face of the wheel hub mounting bracket when positioning the wheel hub mounting bracket. The area of the outer end face that can be positioned without the bracket reinforcement plate is greatly increased, making the positioning of the trailing arm assembly before welding more accurate. In terms of clamping the wheel hub mounting bracket, because the trailing arm is machined with a concave shape corresponding to the wheel hub mounting bracket, the wheel hub fixture has more room to move, facilitating the wheel hub fixture to clamp within a wider area of the inner end face of the wheel hub mounting bracket. In other words, this solution increases the positioning and clamping areas of the wheel hub fixture, ensuring more accurate positioning of the parts of the assembled torsion beam assembly, and also increases the clamping force, thereby increasing the external force to resist welding thermal deformation, which is beneficial to reducing the deformation after welding, thereby improving the dimensional accuracy of the torsion beam assembly before and after welding. The torsion beam assembly produced by adopting this method in combination with a specially designed torsion beam assembly structure can meet the dimensional design requirements of the torsion beam assembly even without end milling, eliminating the end milling process, greatly improving production efficiency and reducing production costs.

[0011] In addition, the top section of the trailing arm is concave. Compared with a smooth structure, the concave shape formed here can enhance the strength of the trailing arm.

[0012] Preferably, as an improvement, the four corners of the bracket reinforcement plate are processed with bevels, and the spare space on the hub mounting bracket next to the bevels of the bracket reinforcement plate is used for positioning the hub tooling fixture.

[0013] This solution sets the bevel angle of the bracket reinforcement plate so that the blank end surface area of the bracket reinforcement plate next to the bevel angle for the hub mounting bracket is larger, which facilitates clamping and positioning at the free corner position next to the bevel angle, further expands the clamping area, and is beneficial to improving the dimensional accuracy of the torsion beam assembly after forming.

[0014] Preferably, as an improvement, the length of the wheel hub mounting bracket along the longitudinal direction of the longitudinal arm is 1 / 3-2 / 5 of the overall length of the longitudinal arm.

[0015] This solution increases the length of the wheel hub mounting bracket in the longitudinal direction, making the outer end surface of the wheel hub mounting bracket larger, which is further beneficial to improving the accuracy of positioning. At the same time, it also increases the area of the clamping area on the inner side of the wheel hub mounting bracket, which is beneficial to improving the positioning and clamping of the wheel hub tooling fixture on the wheel hub mounting bracket, and further helps to improve the product accuracy of the torsion beam assembly after it is manufactured.

[0016] Preferably, as an improvement, the wheel hub mounting bracket is provided with a bevel section integrally formed with the end face, one end of the bevel section is close to the bottom of the bracket reinforcement plate, and the other end of the bevel section is welded to the side end face of the longitudinal arm or welded at the corner position of the side end face of the longitudinal arm.

[0017] This solution improves the strength of the wheel hub mounting bracket by improving the wheel hub mounting bracket.

[0018] Preferably, as an improvement, the wheel hub tooling fixture includes a positioning plate and a clamping plate, the positioning plate is provided with a plurality of positioning columns and at least two anti-rotation pins, the clamping plate is provided with a plurality of clamping columns, the plurality of positioning columns and the plurality of clamping columns form a one-to-one clamping relationship, the positioning columns can be abutted against the outer end face of the wheel hub mounting bracket, and the clamping columns can be abutted against the inner end face of the wheel hub mounting bracket; the anti-rotation pins are used to be inserted into the designed holes on the wheel hub mounting bracket.

[0019] This solution improves the wheel hub fixture so that the fixture not only clamps from the inside and outside, but also inserts into the designed holes of the wheel hub mounting bracket (the designed holes include the wheel hub mounting hole, locking hole and other holes) to limit the rotation of the trailing arm assembly before and after welding, further improving the dimensional accuracy of the torsion beam assembly after production.

[0020] Preferably, as an improvement, countersunk holes are provided on the positioning column and the clamping column, the positioning column is fixed to the positioning plate by bolts, and the clamping column is fixed to the clamping plate by bolts. The distance between the positioning column and the positioning plate, and the distance between the clamping column and the clamping plate can be adjusted by adjusting the number of gaskets on the corresponding bolts.

[0021] Through the design of the positioning column and the clamping column, this solution is equivalent to being able to adjust the length of the positioning column and the clamping column to meet the positioning and clamping requirements of different products, thereby improving the practicality of this solution.

[0022] Preferably, as an improvement, the anti-rotation pin includes a large pin and a small pin, the large pin is used to be inserted into the largest designed hole of the hub mounting bracket, and the small pin is used to be inserted into any other designed hole on the hub mounting bracket except the largest designed hole, and the anti-rotation pin matches the corresponding designed hole size.

[0023] Preferably, as an improvement, an adjustment plate is fixed on the positioning plate, and a small pin is fixed on the adjustment plate. The adjustment plate includes a detachably connected height adjustment plate and a distance adjustment plate. The height adjustment plate is provided with a vertical through hole, and the height adjustment plate is fixedly connected to the distance adjustment plate by inserting a bolt into the vertical through hole; the distance adjustment plate is provided with a horizontal through hole, and the distance adjustment plate is fixedly connected to the positioning plate by inserting a bolt into the horizontal through hole; it also includes an adjustment pad, and a U-shaped through groove is provided on the adjustment pad, and the U-shaped through groove can face the vertical through hole and the horizontal through hole. The adjustment pad can be installed between the distance adjustment plate and the height adjustment plate, and the adjustment pad can be installed between the distance adjustment plate and the positioning plate. The position of the small pin can be adjusted by adjusting the number of adjustment pads.

[0024] This solution enables the position of the small pin on the end face of the positioning plate to be adjusted by arranging the adjustment plate and the adjustment pad to meet the adjustment requirements in different situations and improve practicality.

[0025] Preferably, as an improvement, the wheel hub fixture also includes a pusher and a clamp, the output end of the pusher is provided with a movable seat, the pusher is used to drive the movable seat away from or close to the wheel hub mounting bracket, the clamp and the positioning plate are fixedly connected to the movable seat, the clamp adopts a rotary clamping structure, and the clamping plate is fixed to the output end of the clamp.

[0026] This solution sets a pusher and a clamp so that the pusher can drive the positioning plate and the clamping plate to approach the longitudinal arm assembly at the same time, and the arrangement of the clamp on the movable seat enables the clamp used for clamping the inner end face of the wheel hub mounting bracket to be set on the outside of the wheel hub mounting bracket, so that the entire wheel hub tooling fixture is located on the outside of the torsion beam assembly, reducing the impact of the high temperature generated during the welding process on the wheel hub tooling fixture, and has no effect on the removal and placement of the torsion beam assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the structure of a non-end-milled torsion beam assembly according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 Top view of .

[0029] Figure 3 for Figure 1 Exploded view of the trailing arm and wheel hub mounting bracket.

[0030] Figure 4 Schematic diagram of positioning and clamping of the hub mounting bracket according to an embodiment of the present invention.

[0031] Figure 5 This is a structural schematic diagram of the casing fixture and the hub fixture after positioning and clamping the trailing arm assembly according to an embodiment of the present invention.

[0032] Figure 6 Schematic diagram of the structure of an embodiment of the present invention when the trailing arm assembly is not installed (the clamping plate is located above the trailing arm to be clamped).

[0033] Figure 7 for Figure 6 Top view of the casing fixture.

[0034] Figure 8 for Figure 6 The main view of the wheel hub fixture.

[0035] Figure 9 for Figure 6 Exploded view of the mid-height adjustment plate, the distance adjustment plate, and the adjustment pad. DETAILED DESCRIPTION

[0036] The following is further described in detail through specific implementation methods:

[0037] The figure marks in the drawings of the specification include: crossbeam 1, longitudinal arm 2, concave 21, stamping part 20, crossbeam overlap section 201, wheel hub mounting bracket 3, inclined section 31, bracket reinforcement plate 4, sleeve fixture 5, positioning pin 51, pusher 52, positioning protrusion 511, wheel hub fixture 6, pusher 61, clamp 62, movable seat 63, positioning plate 64, positioning column 641, anti-rotation pin 642, height adjustment plate 643, distance adjustment plate 644, adjustment pad 645, clamping plate 65, clamping column 651.

[0038] The embodiment is basically as shown in the attached Figures 1 to 9 As shown, the production process of the torsion beam assembly without end milling includes the following process steps:

[0039] Step 1: Weld the sleeve and the hub mounting bracket 3 on the trailing arm 2 to form the trailing arm 2 assembly. Figures 1 to 3 Before the wheel hub mounting bracket 3 is welded to the longitudinal arm 2, a bracket reinforcement plate 4 is welded on the inner end surface of the wheel hub mounting bracket 3; the longitudinal arm 2 includes two stamped parts 20 formed by stamping, and the two stamped parts 20 are arranged on the left and right, and one of the stamped parts 20 overlaps the outer surface of the other stamped part 20.

[0040] Before the wheel hub mounting bracket 3 is welded to the trailing arm 2, a bracket reinforcement plate 4 is welded to the inner end face of the wheel hub mounting bracket 3. A concave section 21 is formed on the top of the trailing arm 2, facing the wheel hub mounting bracket 3. The four corners of the bracket reinforcement plate 4 are machined with bevels. The remaining space on the wheel hub mounting bracket 3 next to the bevels of the bracket reinforcement plate 4 is used to position the wheel hub fixture 6. The wheel hub mounting bracket 3 is stamped, and its length along the longitudinal direction of the trailing arm 2 is 1 / 3-2 / 5 of the overall length of the trailing arm 2. A beveled section 31 is also stamped into the wheel hub mounting bracket 3. One end of the beveled section 31 is close to the bottom of the bracket reinforcement plate 4, and the other end is welded to the corner of the side end face of the trailing arm 2.

[0041] Step 2: Assemble the longitudinal arm 2 assembly and the crossbeam 1 first and then weld them. Before welding, use the sleeve fixture 5 to position and clamp the sleeve position of the longitudinal arm 2 assembly. Use the hub fixture 6 to position and clamp the hub mounting bracket 3 from both the inner and outer end faces of the hub mounting bracket 3 (as shown in the following figure). Figure 5 As shown), the beam 1 is positioned and pressed by the beam 1 fixture.

[0042] Specifically: Combined Figures 5 to 7 The casing fixture 5 includes two locating pins 51 that can be brought closer together. Each locating pin 51 has a pusher 52 that drives the locating pin 51 toward the casing. Each locating pin 51 includes a fixedly connected locating pin body 51 and a locating protrusion 511. When positioning the casing, the two locating pin bodies 51 are inserted into the two openings of the casing to position the casing, and the two locating protrusions 511 clamp the casing from the two end faces. This clamping method ensures that the casing is fully positioned while also shortening the length of each locating pin 51, avoiding the problem of the locating pin 51 being too long and unable to be removed due to deformation of the torsion beam assembly after welding.

[0043] Combine Figure 5 and Figure 6The wheel hub fixture 6 includes a pusher 61, a clamp 62, a positioning plate 64 and a clamping plate 65. A moving seat 63 is fixed to the output end of the pusher 61. The pusher 61 is used to drive the moving seat 63 away from or close to the wheel hub mounting bracket 3. The pusher 61 of this embodiment adopts a linear cylinder. The clamp 62 and the positioning plate 64 are both fixedly connected to the moving seat 63. The clamp 62 adopts a rotary pressing structure. The clamping plate is fixed to the output end of the clamp 62. Before clamping, the clamp 62 makes the clamping plate 65 located above the longitudinal arm 2 assembly. After clamping, the clamp 62 drives the clamping plate 65 to rotate from the top of the longitudinal arm 2 assembly to the inner end surface of the wheel hub mounting bracket 3; the clamp 62 of this embodiment adopts an SMC strong clamping cylinder, and the clamp 62 presses down by rotating 90°.

[0044] Combine Figures 4 to 6 The positioning plate 64 is fixed with multiple positioning posts 641 and at least two anti-rotation pins 642, and the clamping plate 65 is fixed with multiple clamping posts 651. The multiple positioning posts 641 and the multiple clamping posts 651 form a one-to-one corresponding clamping relationship. In this embodiment, there are four positioning posts 641 and four clamping posts 651, and two anti-rotation pins 642. The positioning posts 641 can abut against the outer end surface of the wheel hub mounting bracket 3, and the clamping posts 651 can abut against the inner end surface of the wheel hub mounting bracket 3. This improvement allows the wheel hub fixture 6 to be placed outside the trailing arm 2 assembly, where less heat is generated during welding. This reduces the impact of high temperatures on the fixture during welding and facilitates the insertion and removal of the torsion beam assembly before and after welding.

[0045] The positioning column 641 and the clamping column 651 have the same structure. Both the positioning column 641 and the clamping column 651 are processed with countersunk holes. The positioning column 641 is fixed to the positioning plate 64 by bolts, and the clamping column 651 is fixed to the clamping plate 65 by bolts. The distance between the positioning column 641 and the positioning plate 64, and the distance between the clamping column 651 and the clamping plate 65 can be adjusted by adjusting the number of gaskets on the corresponding bolts, so as to make appropriate adjustments according to the different positioning positions of different products, thereby realizing the versatility of the wheel hub tooling fixture 6 and reducing the production cost of the enterprise.

[0046] The anti-rotation pin 642 is used to be inserted into the designed hole on the wheel hub mounting bracket 3. The anti-rotation pin 642 includes a large pin and a small pin. The large pin is fixed to the positioning plate 64 by screws. The large pin is used to be inserted into the largest designed hole on the wheel hub mounting bracket 3, and the small pin is used to be inserted into any other designed hole on the wheel hub mounting bracket 3 except the largest designed hole. The anti-rotation pin 642 matches the corresponding designed hole size.

[0047] Combine Figure 8 and Figure 9, an adjustment plate is fixed on the positioning plate 64, and a small latch is fixed to the adjustment plate by screws. The adjustment plate includes a height adjustment plate 643 and a distance adjustment plate 644 fixed to each other by bolts. A vertical through-hole is processed on the height adjustment plate 643, and the height adjustment plate 643 is fixedly connected to the distance adjustment plate 644 by inserting a bolt into the vertical through-hole; a horizontal through-hole is processed on the distance adjustment plate 644, and the distance adjustment plate 644 is fixedly connected to the positioning plate 64 by inserting a bolt into the horizontal through-hole; it also includes an adjustment pad 645, a U-shaped through-groove is processed on the adjustment pad 645, and the U-shaped through-groove can be directly opposite to the vertical through-hole and the horizontal through-hole. The adjustment pad 645 can be installed between the distance adjustment plate 644 and the height adjustment plate 643, and the adjustment pad 645 can be installed between the distance adjustment plate 644 and the positioning plate 64. By adjusting the number of the adjustment pads 645, the position of the small latch can be adjusted to meet the anti-rotation requirements of different products.

[0048] In addition, in order to further ensure the assembly welding effect, the support and fixation of the longitudinal arm 2 is indispensable. In this embodiment, the support and fixation of the longitudinal arm 2 adopts conventional support plates and limit blocks for positioning support (not shown in the figure).

[0049] The technical effects of this embodiment are as follows:

[0050] Before the present invention was obtained, the inventor considered changing the position of the bracket reinforcement plate 4, such as placing the bracket reinforcement plate 4 to the inner side of the wheel hub mounting bracket 3. However, after the position change, the size of the bracket reinforcement plate 4 must be made smaller to facilitate the welding of the bracket reinforcement plate 4 on the wheel hub mounting bracket 3; however, this method will make the positioning and clamping of the tooling fixture during the welding of the torsion beam assembly worse, simply because after the bracket reinforcement plate 4 is placed on the inner side of the wheel hub mounting bracket 3, the bracket reinforcement plate 4 needs to be set smaller to be welded, and when the bracket reinforcement plate 4 is clamped by the tooling fixture, the stroke of the tooling fixture is limited by the longitudinal arm 2, resulting in a smaller inner size of the wheel hub mounting bracket 3 that the tooling fixture can clamp. When the inside and outside are clamped, either the inside and outside cannot be clamped directly, resulting in a loose clamping; or the clamping area formed when clamped directly is smaller, resulting in inaccurate positioning, and the position accuracy before welding cannot be guaranteed, which is not conducive to controlling the deformation of the torsion beam assembly after it is manufactured.

[0051] The invention of this embodiment provides a larger clamping space for the wheel hub fixture 6 to clamp the wheel hub mounting bracket 3 by processing a concave shape 21 on the top of the longitudinal arm 2. Therefore, even if the bracket reinforcement plate 4 is welded to the inner side of the wheel hub mounting bracket 3, it will not cause the problem of the clamping area becoming smaller; and after the bracket reinforcement plate 4 is replaced to the inner end face of the wheel hub mounting bracket 3, since the outer end face of the wheel hub mounting bracket 3 is a large plane, there will be no welding slag on the large plane, which ensures that the outer side surface of the wheel hub mounting bracket 3 is a flat large plane, and the positioning accuracy is guaranteed; and there is no need to perform milling or grinding on the position to be positioned before the wheel hub fixture 6 is positioned, and the inner end face of the wheel hub mounting bracket 3 is mainly used to cooperate with the outer positioning end face for clamping, The surface quality requirements of the side end face are reduced, which is also conducive to maximizing the clamping area as much as possible on the basis of meeting the clamping requirements of the hub fixture 6 (the definition of the clamping area: if four points are clamped, the area formed by the four points connected in sequence is the clamping area). On the basis of the larger clamping area and the larger and more precise positioning surface, the hub fixture 6 can position the torsion beam assembly to be formed more accurately and clamp with greater force, reducing the deformation amplitude of the torsion beam assembly after welding, so that the produced torsion beam assembly can meet the dimensional design requirements of the torsion beam assembly even without end milling, solving the current problem of end milling, thus eliminating the end milling process, greatly improving production efficiency and reducing production costs.

[0052] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. The production process of torsion beam assembly without end milling is characterized by: The process steps include: Step 1: Weld the sleeve and the wheel hub mounting bracket to the trailing arm to form a trailing arm assembly. Before welding the wheel hub mounting bracket to the trailing arm, weld a bracket reinforcement plate to the inner end surface of the wheel hub mounting bracket. The top section of the trailing arm facing the wheel hub mounting bracket is concave. Step 2: Assemble the trailing arm assembly and the crossbeam before welding. Before welding, use the sleeve fixture to position and clamp the sleeve of the trailing arm assembly. Use the wheel hub fixture to position and clamp the wheel hub mounting bracket from both the inner and outer end faces of the wheel hub mounting bracket. The wheel hub fixture includes a positioning plate and a clamping plate. The positioning plate is provided with a plurality of positioning posts and at least two anti-rotation pins. The clamping plate is provided with a plurality of clamping posts. The plurality of positioning posts and the plurality of clamping posts form a one-to-one clamping relationship. The positioning posts can abut against the outer end surface of the wheel hub mounting bracket, and the clamping posts can abut against the inner end surface of the wheel hub mounting bracket. The anti-rotation pins are used to be inserted into the designed holes on the wheel hub mounting bracket. The anti-rotation pin includes a large pin and a small pin. The large pin is used to be inserted into the largest designed hole of the wheel hub mounting bracket, and the small pin is used to be inserted into any other designed hole on the wheel hub mounting bracket except the largest designed hole. The anti-rotation pin matches the corresponding designed hole size. An adjustment plate is fixed on the positioning plate, and a small pin is fixed on the adjustment plate. The adjustment plate includes a detachably connected height adjustment plate and a distance adjustment plate. The height adjustment plate is provided with a vertical through hole, and the height adjustment plate is fixedly connected to the distance adjustment plate by inserting a bolt into the vertical through hole; the distance adjustment plate is provided with a horizontal through hole, and the distance adjustment plate is fixedly connected to the positioning plate by inserting a bolt into the horizontal through hole; it also includes an adjustment pad, which is provided with a U-shaped through groove, and the U-shaped through groove can face the vertical through hole and the horizontal through hole. The adjustment pad can be installed between the distance adjustment plate and the height adjustment plate, and the adjustment pad can be installed between the distance adjustment plate and the positioning plate. The position of the small pin can be adjusted by adjusting the number of adjustment pads.

2. The process for producing a torsion beam assembly without end milling according to claim 1, characterized in that: The four corners of the bracket reinforcement plate are all processed with bevels, and the remaining space on the hub mounting bracket next to the bevels of the bracket reinforcement plate is used for positioning the hub tooling fixture.

3. The process for producing a torsion beam assembly without end milling according to claim 1, characterized in that: The length of the wheel hub mounting bracket along the longitudinal direction of the longitudinal arm is 1 / 3-2 / 5 of the entire length of the longitudinal arm.

4. The process for producing a torsion beam assembly without end milling according to claim 3 is characterized in that: The hub mounting bracket is provided with an inclined section integrally formed with the end face, one end of the inclined section is close to the bottom of the bracket reinforcement plate, and the other end of the inclined section is welded to the side end face of the longitudinal arm or welded to the corner position of the side end face of the longitudinal arm.

5. The process for producing a torsion beam assembly without end milling according to claim 1 is characterized in that: The positioning column and the clamping column are both provided with countersunk holes. The positioning column is fixed to the positioning plate by bolts, and the clamping column is fixed to the clamping plate by bolts. The distance between the positioning column and the positioning plate, and the distance between the clamping column and the clamping plate can be adjusted by adjusting the number of gaskets on the corresponding bolts.

6. The process for producing a torsion beam assembly without end milling according to claim 1 is characterized in that: The wheel hub fixture also includes a pusher and a clamp. The output end of the pusher is provided with a moving seat. The pusher is used to drive the moving seat away from or close to the wheel hub mounting bracket. The clamp and the positioning plate are fixedly connected to the moving seat. The clamp adopts a rotary pressing structure, and the clamping plate is fixed to the output end of the clamp.

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