A device for milling both end faces of a vehicle plate spring eye

Abstract

The application discloses a device capable of milling both end faces of a vehicle plate spring eye simultaneously, which comprises a milling device body, a bottom plate arranged at the bottom of the milling device body, a plate spring eye clamping and fixing device arranged at the upper end of the rear end of the bottom plate, milling devices arranged at the left and right ends of the front bottom plate of the plate spring eye clamping and fixing device, a plate spring arm clamping and positioning device arranged at the upper end of the front end of the bottom plate, and a control box arranged at the front end of the milling device; in general, the application has the advantages of simple structure, convenient use, automatic fixing of the plate spring eye and the plate spring arm during the plate spring eye milling process, prevention of the plate spring eye from shaking during the milling process, prevention of size deviation of the processed product, high automation degree, saving of manpower and material resources, and improvement of production efficiency.

Description

Technical Field

[0001] This invention patent relates to the field of automotive leaf spring processing technology, and in particular to a device that can simultaneously mill both ends of the coil lug of an automotive leaf spring. Background Technology

[0002] Leaf springs are the most widely used elastic element in automotive suspensions. They consist of several alloy spring leaves of equal width but unequal length and thickness, forming an approximately uniform elastic beam. When a leaf spring is installed in a car suspension and bears a positive vertical load, each spring leaf deforms under stress, tending to arch upwards. At this time, the axle and frame move closer together. When the axle and frame move away from each other, the positive vertical load and deformation on the leaf spring gradually decrease, sometimes even reversing. Flat, rectangular steel plates are bent into a chassis spring structure, with one end mounted to a hanger by a pin and the other end connected to the main beam by a lug, allowing the spring to extend and retract.

[0003] In the processing of leaf springs, a crucial step is fixing the leaf spring and milling the two sides of the leaf spring lug. The quality of this step directly affects the factory quality of the leaf spring and the accuracy and reliability of subsequent installation. Currently, this processing step relies on workers manually fixing the leaf spring onto specific fixtures and then milling each side of the leaf spring lug. However, workers currently cannot fix the lug in the correct position during the fixing process, leading to significant errors in the milling of the leaf spring lug and failure to meet dimensional requirements. Furthermore, during the fixing process, the leaf spring arm needs to be manually clamped by specific clamping fixtures to prevent the leaf spring lug from wobbling during milling. Moreover, the existing leaf spring fixing fixtures cannot be adjusted according to different leaf spring sizes, requiring specific clamping fixtures and wasting costs. Additionally, manual clamping of the leaf spring wastes manpower and reduces production efficiency. Most existing leaf spring milling devices can only mill one side of the leaf spring during the milling process. After milling, they need to be repositioned and fixed to mill the other side of the leaf spring, which is time-consuming and inefficient. Therefore, it is of great significance to develop a device that can simultaneously mill both ends of automotive leaf springs. This device is simple in structure, easy to use, and can automatically fix the leaf spring and leaf spring arm during the milling process to prevent the leaf spring from shaking during the milling process and causing dimensional deviations. It requires no manpower, has a high degree of automation, saves manpower and material resources, and improves production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a device capable of simultaneously milling both ends of an automotive leaf spring lug, solving the problem that existing leaf spring lug processing relies on workers manually fixing the leaf spring to a specific fixture before milling both sides of the lug one by one. However, currently, workers often cannot fix the lug in the correct position during the leaf spring fixing process, leading to significant errors in the milling process and failing to meet dimensional requirements. Furthermore, during the fixing process, the leaf spring arm requires a specific clamping fixture and manual clamping to prevent the lug from wobbling during milling. Moreover, existing leaf spring fixing fixtures cannot be adjusted for different leaf spring sizes, requiring specific clamping fixtures and wasting costs. Additionally, manual clamping of the leaf spring wastes manpower and reduces production efficiency. Most leaf spring milling devices can only mill one side of the leaf spring during the milling process. After milling, they need to be repositioned and fixed to mill the other side of the leaf spring, which is time-consuming and inefficient. Therefore, it is of great significance to develop a device that can simultaneously mill both ends of automotive leaf springs. This device is simple in structure, easy to use, and can automatically fix the leaf spring and leaf spring arm during the milling process to prevent the leaf spring from shaking and causing dimensional deviations. It requires no manpower, has a high degree of automation, saves manpower and material resources, and improves production efficiency.

[0005] To achieve the above objectives, the technical solution provided by this invention patent is as follows: A device capable of simultaneously milling both ends of an automotive leaf spring coil ear includes a milling device body, a base plate at the bottom of the milling device body, a leaf spring coil ear clamping and fixing device at the upper rear end of the base plate, milling devices at the left and right ends of the base plate in front of the leaf spring coil ear clamping and fixing device, a leaf spring arm clamping and positioning device at the upper front end of the base plate, and a control box at the front end of the milling device. The leaf spring coil ear clamping and fixing device is equipped with a clamping cylinder at the bottom, a telescopic rod in the middle of the clamping cylinder, a connector at the upper end of the telescopic rod, a rocker arm in cooperation with the rocker arm, the front end of the rocker arm in cooperation with the upper fixing member of the coil ear, and a lower fixing member of the coil ear below the upper fixing member of the coil ear, which is located at the upper end of the middle of the base plate. The aforementioned leaf spring arm clamping and positioning device is located at the upper end of the base plate. A bottom support circular plate is provided at the bottom of the leaf spring arm clamping and positioning device. A middle support circular plate is provided at the upper end of the bottom support circular plate, and a top support circular plate is provided at the upper end of the middle support circular plate. A connecting wall plate is sleeved on the outer wall of the middle support circular plate. The inner wall of the clamping connecting seat is fixedly connected to the connecting wall plate. A clamping element is provided at the upper end of the clamping connecting seat. The outer wall of the clamping connecting seat is connected to the driven rocker arm. The end of the driven rocker arm is connected to the telescopic rod of the telescopic cylinder. The rear end of the telescopic cylinder is fixedly connected to the bottom support circular plate. A leaf spring wall support plate is fixedly provided in the middle of the front side wall of the top support circular plate, and a positioning element is provided on the leaf spring wall support plate.

[0006] Furthermore, the bottom rear end of the upper fixing member of the curling ear and the upper rear end of the lower fixing member of the curling ear are both arc-shaped.

[0007] Furthermore, the thickness of the upper and lower fixing parts of the rolled ear is less than the thickness of the rolled ear.

[0008] Furthermore, the connecting wall panel is a semi-circular structure fitted outside the central supporting circular plate, and the connecting wall panel can slide circumferentially when pushed by the rocker arm.

[0009] Furthermore, the leaf spring wall support plate has a bent structure with the front end higher than the rear end.

[0010] Furthermore, a milling base is provided at the bottom of the milling device, a drive shaft is provided in the middle of the inner wall of the milling base, a milling cutter is provided inside the drive shaft, and a drive motor is provided at the upper end of the milling base.

[0011] Furthermore, a box is provided at the bottom of the control box, a control device is provided at the top of the box, a display screen is provided on the front side wall of the control device, control buttons are provided at the bottom of the display screen, and an emergency stop button is provided on the right side of the display screen.

[0012] Furthermore, the control box is electrically connected to the leaf spring coil clamping and fixing device, the milling device, and the leaf spring arm clamping and positioning device, respectively.

[0013] Furthermore, a foot switch is provided at the bottom of the milling device body, and the foot switch is electrically connected to the control box.

[0014] Beneficial effects: 1. This invention patent provides a leaf spring coil clamping and fixing device at the upper rear of the base plate. The device includes a clamping cylinder with a telescopic rod in the middle. A connector is attached to the upper end of the telescopic rod, and the connector is bolted to a rocker arm. The rocker arm cannot rotate during the fixing process. An upper fixing member is attached to the other end of the rocker arm, and this upper fixing member is fixedly connected to the rocker arm and cannot rotate. A lower fixing member is located directly below the upper fixing member. The rear of the component and the lower fixing component of the rolled ear are arc-shaped. During use, after the leaf spring arm limits and fixes the rolled ear, it is located between the upper fixing component and the lower fixing component of the rolled ear. The starting cylinder pushes the front end of the rocker arm down, which at the same time drives the upper fixing component of the rolled ear down and cooperates with the lower fixing component of the rolled ear to complete the rolling ear fixing. The rolled ear can be fixed without the need for specific fixing fixtures. At the same time, the rocker arm is pushed by the cylinder during the fixing process and cooperates with the upper fixing component and the lower fixing component of the rolled ear to complete the rolling ear fixing. It requires no manpower, has a high degree of automation, and saves processing time. A spring arm clamping and positioning device is installed at the upper front end of the base plate. This device includes a bottom support circular plate, a middle support circular plate, and a top support circular plate. These three plates are non-rotatable. A connecting wall plate, which is semi-circular in structure, is fitted onto the outer side of the middle support circular plate. A clamping connecting seat and clamping components are fixedly installed on the connecting wall plate. A driven rocker arm is fixedly installed on the rear side wall of the clamping connecting seat. The end of the driven rocker arm is connected to a driving rocker arm. A telescopic cylinder is fitted into the middle of the driving rocker arm. The rear of the telescopic cylinder is fixedly connected to the middle support circular plate. A spring arm support plate is fixedly installed on the rear side wall of the top support circular plate. A positioning component is installed on the spring arm support plate. The spring arm support plate can be... The bolts are fixedly connected to the top support circular plate. During use, a suitable leaf spring arm support plate can be selected and replaced according to the length of the leaf spring arm and the position of the positioning hole. During use, the leaf spring arm is located above the top support circular plate, and the positioning hole on the leaf spring arm is sleeved on the outside of the positioning part. When the telescopic cylinder is activated, the telescopic cylinder extends the telescopic rod to push the drive rocker and the driven rocker to rotate, and at the same time drive the clamping connecting seat and the clamping part to rotate. The leaf spring arm is located between the clamping parts. During the rotation and merging of the clamping parts, the leaf spring arm can be fixed. During the fixing process, the leaf spring arm only needs to be located between the clamping parts and the telescopic cylinder is activated to complete the fixing. At the same time, it can be freely adjusted according to the width and length of the leaf spring arm, which saves manpower and material resources and has the advantages of improving production efficiency. Milling devices are installed on both sides of the base plate. After the leaf spring arm and leaf spring are fixed during the leaf spring winding process, the leaf spring is slowly moved in a straight line from the front end of the base plate to the front section of the milling cutter body under the push of the machine tool for milling. The milling device can mill both ends of the leaf spring simultaneously. During the setup process, the milling cutter body is located on both sides of the upper and lower fixing parts of the leaf spring and is set according to the milling size of the leaf spring. The leaf spring can be milled from the front end to the rear end during the machine tool push process. There is no need to reposition and fix the leaf spring during the processing, which improves production efficiency and saves processing time. In summary, this invention has the advantages of simple structure, convenient use, automatic fixation of leaf spring and leaf spring arm during the leaf spring winding milling process to prevent the leaf spring and leaf spring from shaking during the milling process and causing dimensional deviations, no need for manpower, high degree of automation, saving manpower and material resources, and improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a three-dimensional structural diagram of the leaf spring coil clamping and fixing device and the milling device of the present invention. Figure 3 This is a three-dimensional structural diagram of the leaf spring arm clamping and positioning device of this invention patent; Figure 4 This is a three-dimensional structural diagram of the control box of this invention.

[0016] Reference numerals: 0. Milling device body; 1. Leaf spring coil clamping and fixing device; 10. Clamping cylinder; 11. Connecting piece; 12. Rocker arm; 13. Upper fixing piece for coil; 14. Lower fixing piece for coil; 2. Milling device; 20. Milling base; 21. Drive motor; 22. Drive shaft; 23. Milling cutter body; 24. Baffle; 3. Leaf spring arm clamping and positioning device; 30. Top support round plate; 31. Middle support round plate; 32. Bottom support round plate; 33. Clamping connecting seat; 34. Clamping piece; 35. Telescopic cylinder; 350. Telescopic rod; 36. Drive rocker arm; 37. Driven rocker arm; 38. Leaf spring arm support plate; 39. Positioning piece; 4. Control box; 40. Box; 41. Control device; 42. Display screen; 43. Emergency stop button; 44. Control buttons; 5. Base plate. Detailed Implementation

[0017] The embodiments of this invention will be further described below with reference to the accompanying drawings.

[0018] Specific embodiments of this invention patent, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, this invention patent provides a device that can simultaneously mill both ends of an automotive leaf spring coil ear, including a milling device body 0, a base plate 5 at the bottom of the milling device body 0, characterized in that: a leaf spring coil ear clamping and fixing device 1 is provided at the upper rear end of the base plate 5, milling devices 2 are provided at the left and right ends of the base plate 5 in front of the leaf spring coil ear clamping and fixing device 1, a leaf spring arm clamping and positioning device 3 is provided at the upper front end of the base plate 5, and a control box 4 is provided at the front end of the milling device 2. like Figure 2 As shown, a clamping cylinder 10 is provided at the bottom of the leaf spring coil clamping and fixing device 1. A telescopic rod is provided in the middle of the clamping cylinder 10. A connector 11 is connected to the upper end of the telescopic rod. The connector 11 is connected to the rocker arm 12. The front end of the rocker arm 12 is connected to the upper fixing member 13 of the coil. A lower fixing member 14 of the coil is provided below the upper fixing member 13 of the coil. The lower fixing member 14 of the coil is located at the upper end of the middle of the base plate 5. A leaf spring coil clamping and fixing device 1 is provided at the upper rear end of the base plate 5. The leaf spring coil clamping and fixing device 1 is equipped with a clamping cylinder 10, which is located in the middle of the rear of the baffle 24. A telescopic rod is provided in the middle of the clamping cylinder 10, and a connector 11 is connected to the upper end of the telescopic rod. The connector 11 is connected to the rocker arm 12 by bolts. The rocker arm 12 cannot be rotated during the fixing process. A coil upper fixing part 13 is connected to the other end of the rocker arm 12. The coil upper fixing part 13 is fixedly connected to the rocker arm 12 and cannot be rotated. A lower fixing member 14 for the rolled ear is provided directly below the upper fixing member 13. When the rolled ear is milled, the upper fixing member 13 and the lower fixing member 14 for the rolled ear are located in front of the milling cutter body 23. The rear of the upper fixing member 13 and the lower fixing member 14 for the rolled ear is arc-shaped. During use, after the leaf spring arm limits and fixes the rolled ear, it is located between the upper fixing member 13 and the lower fixing member 14 for the rolled ear. When the clamping cylinder 10 is activated, it pushes the front end of the rocker arm 12 down and simultaneously drives the upper fixing member 13 for the rolled ear to be pressed down and cooperate with the lower fixing member 14 for the rolled ear to be fixed. like Figure 3As shown, the leaf spring arm clamping and positioning device 3 is located on the upper end of the base plate 5. The bottom of the leaf spring arm clamping and positioning device 3 is provided with a bottom support circular plate 32, the upper end of the bottom support circular plate 32 is provided with a middle support circular plate 31, the upper end of the middle support circular plate 31 is provided with a top support circular plate 30, the outer wall of the middle support circular plate 31 is fitted with a connecting wall plate, the inner wall of the clamping connecting seat 33 is fixedly connected to the connecting wall plate, the upper end of the clamping connecting seat 33 is provided with a clamping element 34, the outer wall of the clamping connecting seat 33 is connected to the driven rocker arm 37, the end of the driven rocker arm 37 is connected to the driving rocker arm 36, the driving rocker arm 36 is connected to the telescopic air rod 350 of the telescopic cylinder 35, the rear end of the telescopic cylinder 35 is fixedly connected to the bottom support circular plate 32, and the middle of the front side wall of the top support circular plate 30 is fixedly provided with a leaf spring wall support plate 38, and a positioning element 39 is provided on the leaf spring wall support plate 38. A leaf spring arm clamping and positioning device 3 is provided at the upper front end of the base plate 5. The leaf spring arm clamping and positioning device 3 is provided with a bottom support circular plate 32, a middle support circular plate 31, and a top support circular plate 30. The bottom support circular plate 32, the middle support circular plate 31, and the top support circular plate 30 are not rotatable. A connecting wall plate is sleeved on the outer side of the middle support circular plate 31. The connecting wall plate has a semi-circular structure and can rotate under the push of the driven rocker arm 37. A clamping connecting seat 33 and a clamping element 34 are fixedly provided on the connecting wall plate. A driven rocker arm 37 is fixedly provided on the rear side wall of the clamping connecting seat 33. The end of the driven rocker arm 37 is connected to the driving rocker arm 36. A telescopic cylinder 35 is provided in the middle of the driving rocker arm 36. The rear of the telescopic cylinder 35 is fixedly connected to the middle support circular plate 31. A leaf spring arm support plate 38 is fixedly installed on the rear side wall of the supporting circular plate 30. A positioning element 39 is provided on the leaf spring arm support plate 38. The leaf spring arm support plate 38 can be fixedly connected to the top supporting circular plate 30 by bolts. During use, a suitable leaf spring arm support plate 38 can be selected and replaced according to the length of the leaf spring arm and the position of the positioning hole. During use, the leaf spring arm is located above the top supporting circular plate 30, and the positioning hole opened on the leaf spring arm is sleeved on the outside of the positioning element 39. When the telescopic cylinder 35 is activated, the telescopic cylinder 35 extends the telescopic rod 350 to push the driving rocker arm 36 and the driven rocker arm 37 to rotate, and at the same time drive the connecting wall plate, the clamping connecting seat and the clamping element to rotate. The leaf spring arm is located between the clamping elements 34. The clamping elements 34 can fix the leaf spring arm during the rotation and merging process.

[0019] like Figure 2 As shown, the bottom rear end of the upper fixing member 13 and the upper rear end of the lower fixing member 14 are both arc-shaped. During use, the ear is located between the upper fixing member 13 and the lower fixing member 14, and the rear side wall of the ear is in close contact with the arc side wall of the lower fixing member 14. The lower arc surface of the upper fixing member 13 and the arc surface of the lower fixing member 14 can make the ear more securely fixed.

[0020] like Figure 2 As shown, the thickness of the upper fixing member 13 and the lower fixing member 14 of the rolled ear is less than the thickness of the rolled ear. During the milling process of the rolled ear side wall, the machine tool pushes the leaf spring rolled ear clamping and fixing device, the leaf spring arm clamping and positioning device and the rolled ear slowly to the milling cutter body 23. The milling cutter body 23 mills the protruding part of the rolled ear. The fact that the thickness of the upper fixing member 13 and the lower fixing member 14 of the rolled ear is less than the thickness of the rolled ear can effectively prevent the milling cutter body 23 from milling the leaf spring rolled ear clamping and fixing device 1 during the milling process.

[0021] like Figure 3 As shown, the connecting wall plate is a semi-circular structure sleeved on the outside of the central support circular plate 31, and the connecting wall plate can slide in a circle when pushed by the rocker arm 37. During the clamping process of the leaf spring arm, the rocker arm pushes the connecting wall plate to move in a circle and drives the clamping connecting seat 33 and the clamping member 34 to move in a circle to complete the fixing of the leaf spring arm.

[0022] like Figure 3 As shown, the leaf spring wall support plate 38 is a bent structure with the front end higher than the rear end. By setting the leaf spring wall support plate 38, during the leaf spring clamping process, the leaf spring arm needs to be positioned above the leaf spring arm support plate 38, and the positioning hole is sleeved on the outside of the positioning member 39 to complete the leaf spring positioning.

[0023] like Figure 2 As shown, a milling base 20 is provided at the bottom of the milling device 2, a drive shaft 22 is provided in the middle of the inner side wall of the milling base 20, a milling cutter body 23 is provided inside the drive shaft 22, and a drive motor 21 is provided at the upper end of the milling base 20. Milling devices 2 are provided on the left and right sides of the base plate. After the leaf spring arm and the rolled ear are fixed during the rolling ear processing, the rolled ear moves slowly in a straight line from the front end of the base plate 5 to the front end of the milling cutter body 23 under the pushing action of the machine tool for milling processing. The milling device 2 can mill both ends of the rolled ear at the same time. During the setting process, the milling cutter body 23 is located on both sides of the upper fixing member 13 and the lower fixing member 14 of the rolled ear and is set according to the milling size of the rolled ear. The rolled ear can be milled from the front end to the rear end during the pushing process of the machine tool.

[0024] The bottom of the control box 4 is provided with a box 40, the upper end of the box 40 is provided with a control device 41, the front side wall of the control device 41 is provided with a display screen 42, the lower end of the display screen 42 is provided with control buttons 44, and the right side of the display screen 42 is provided with an emergency stop button 43.

[0025] The control box 4 is electrically connected to the leaf spring coil clamping and fixing device 1, the milling device 2, and the leaf spring arm clamping and positioning device 3, respectively.

[0026] A foot switch is provided at the bottom of the milling device body 0. The foot switch is electrically connected to the control box 4. During use, the spring ear is located above the leaf spring arm clamping and positioning device 3 and the leaf spring ear clamping and fixing device 1. After positioning is completed, stepping on the foot switch will start the leaf spring arm clamping and positioning device 3 and the leaf spring ear clamping and fixing device 1 to complete the leaf spring clamping and fixing.

[0027] In the process of using this invention patent: First, a suitable leaf spring arm support plate 38 needs to be selected according to the thickness of the leaf spring coil ear, the length of the leaf spring arm, and the position of the positioning hole, and fixedly connected to the top support round plate 30. The leaf spring arm is placed above the leaf spring arm support plate 38, with the positioning hole sleeved on the outside of the positioning part 39 and the leaf spring arm located between the clamping parts 34. In addition, the leaf spring coil ear needs to be located between the upper fixing part 13 and the lower fixing part 14 of the coil ear. Step on the foot switch, and the foot switch controls the telescopic cylinder 35 to start, extending the telescopic rod 350 to push the driving rocker arm 36 and the driven rocker arm 37 to rotate, pushing the connecting wall plate to move circumferentially and causing the clamping connecting seat 33 and the clamping part 34 to move circumferentially to clamp the leaf spring arm. At the same time, the clamping cylinder 10 is controlled to start, pushing the rear part of the rocker arm 12 to move upward and downward, and causing the upper fixing part 13 of the coil ear to move downward and engage with the coil ear. The lower fixing member 14 cooperates to complete the fixing of the rolled ear. At the same time, the rolled ear, the upper fixing member 13, and the lower fixing member 14 are located in front of the milling cutter body 23. The milling cutter body is positioned appropriately according to the thickness of the rolled ear and the processing thickness during the setting process. The machine tool drives the base plate 5 and the leaf spring arm clamping and positioning device 3 and the leaf spring and rolled ear clamping and fixing device 1 located above the base plate 5 to move slowly backward. When they reach the milling cutter body 23, the milling cutter body 23 mills the protruding part of the rolled ear to complete the milling of the two side walls of the rolled ear. In general, this invention patent has the advantages of simple structure, convenient use, automatic fixing of leaf spring rolled ear and leaf spring arm during the milling process of leaf spring rolled ear to prevent the leaf spring rolled ear from shaking during the milling process and causing dimensional deviations in the processing, no need for manpower, high degree of automation, saving manpower and material resources, and improving production efficiency.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this invention and not to limit it. Although the invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this invention without departing from the spirit and scope of the invention, and all such modifications and substitutions should be covered within the scope of the claims of this invention.

Claims

1. A device capable of simultaneously milling both ends of an automotive leaf spring coil, comprising a milling device body (0), wherein a base plate (5) is provided at the bottom of the milling device body (0), characterized in that: The upper rear end of the base plate (5) is provided with a leaf spring coil clamping and fixing device (1), and the left and right ends of the base plate (5) in front of the leaf spring coil clamping and fixing device (1) are provided with milling devices (2). The upper front end of the base plate (5) is provided with a leaf spring arm clamping and positioning device (3), and the front end of the milling device (2) is provided with a control box (4). The leaf spring coil clamping and fixing device (1) is provided with a clamping cylinder (10) at the bottom, and a telescopic rod is provided in the middle of the clamping cylinder (10). A connector (11) is connected to the upper end of the telescopic rod. The connector (11) is connected to the rocker arm (12). The front end of the rocker arm (12) is connected to the upper fixing part (13) of the coil. A lower fixing part (14) of the coil is provided below the upper fixing part (13). The lower fixing part (14) of the coil is located at the upper end of the middle of the base plate (5). The leaf spring arm clamping and positioning device (3) is located at the upper end of the base plate (5). The leaf spring arm clamping and positioning device (3) has a bottom support circular plate (32) at the bottom, a middle support circular plate (31) at the upper end of the bottom support circular plate (32), and a top support circular plate (30) at the upper end of the middle support circular plate (31). A connecting wall plate is sleeved on the outer wall of the middle support circular plate (31). The inner wall of the clamping connecting seat (33) is fixedly connected to the connecting wall plate. A clamping member (34) is provided at the upper end of the clamping connecting seat (33). The outer wall of the clamping connecting seat (33) is connected to the driven rocker arm (37), the end of the driven rocker arm (37) is connected to the driving rocker arm (36), the driving rocker arm (36) is connected to the telescopic air rod (350) of the telescopic cylinder (35), the rear end of the telescopic cylinder (35) is fixedly connected to the bottom support circular plate (32), and a leaf spring wall support plate (38) is fixedly provided in the middle of the front side wall of the top support circular plate (30), and a positioning element (39) is provided on the leaf spring wall support plate (38).

2. The device for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 1, characterized in that, The bottom rear end of the upper fixing member (13) and the upper rear end of the lower fixing member (14) are both arc-shaped.

3. The device for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 2, characterized in that, The thickness of the upper fixing member (13) and the lower fixing member (14) of the rolled ear is less than the thickness of the rolled ear.

4. The apparatus for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 1, characterized in that, The connecting wall panel is a semi-circular structure fitted on the outside of the central supporting circular plate (31), and the connecting wall panel can slide in a circle when pushed by the rocker arm (37).

5. The apparatus for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 1, characterized in that, The leaf spring wall support plate (38) is a bent structure with the front end higher than the rear end.

6. The apparatus for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 1, characterized in that, The milling device (2) is provided with a milling seat (20) at the bottom, a drive shaft (22) is provided in the middle of the inner side wall of the milling seat (20), a milling cutter body (23) is provided inside the drive shaft (22), and a drive motor (21) is provided at the upper end of the milling seat (20).

7. The apparatus for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 1, characterized in that, The control box (4) has a box (40) at the bottom, a control device (41) at the top of the box (40), a display screen (42) on the front side wall of the control device (41), a control button (44) at the bottom of the display screen (42), and an emergency stop button (43) on the right side of the display screen (42).

8. The apparatus for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 7, characterized in that, The control box (4) is electrically connected to the leaf spring coil clamping and fixing device (1), the milling device (2), and the leaf spring arm clamping and positioning device (3), respectively.

9. The apparatus for simultaneously milling both ends of an automotive leaf spring coil lug according to claim 1, characterized in that, The milling device body (0) is equipped with a foot switch at the bottom, and the foot switch is electrically connected to the control box (4).

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