Two-side character pressing equipment for automobile door hinge

Abstract

The utility model provides two-side character pressing equipment for an automobile door hinge, and relates to the technical field of finish machining equipment. Comprising a discharging device, a detection switch for detecting whether materials exist or not is installed on the discharging device, and the materials are conveyed to the discharging device through a vibration disc feeder; the character pressing device comprises a character pressing frame, the character pressing frame is provided with a character pressing area, the mechanical arm can move materials to the character pressing area from the discharging device, a fixed character head block and a movable character head block are arranged on the character pressing frame, and the movable character head block and the fixed character head block can press characters on the two sides of the materials when the movable character head block moves. The positioning device is arranged near the character pressing area and comprises a positioning column and a material pushing head, and the material pushing head and the positioning column are moved into the character pressing area to clamp or loosen materials; the material pushing device comprises a material returning rod, and the material pushing head can push the materials out of the character pressing area to the conveying device. The character pressing depth of equipment is consistent, the size consistency is guaranteed, the service life of the character head block is long, the replacement frequency is reduced, the production cost is low, and the production efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of finishing equipment, in particular to a double-sided lettering equipment for automobile door hinges. Background Art

[0002] At present, automobile door hinges are important parts of automobile doors, commonly known as door hinges. Their main function is to connect the automobile door and the body of the automobile so that the door can be opened and closed. Automobile door hinges are composed of at least two parts, one is the body part connected to the body, and the other is the door part connected to the door. Due to the extremely high safety requirements of automobiles, traceability is required, so it is necessary to stamp words on the body parts and door parts for traceability.

[0003] The existing embossing equipment for body parts and door parts adopts a press (punch) for embossing. The punching machine typeface head is rigidly connected, and there is a parallel error between the two planes to be embossed. The depth of the font is easily inconsistent, and the characters are not fully displayed after electroplating or electrophoretic paint. Due to the high speed of the punching machine, the life of the embossing head block is short under high-speed impact, and the embossing head block must be replaced frequently, resulting in high production costs. Manual loading and unloading is labor-intensive and inefficient. Utility Model Content

[0004] The utility model provides a double-sided lettering device for automobile door hinges. The prior art has the problems of inconsistent font depth, frequent replacement of lettering head blocks, high production cost, high labor intensity and low efficiency.

[0005] In order to solve the above utility model purpose, the technical solution provided by the utility model is as follows:

[0006] A double-sided lettering device for automobile door hinges, comprising a vibrating plate feeder, a discharging device is installed at the feeding outlet of the vibrating plate feeder, a detection switch for detecting whether there is material is installed on the discharging device, and the vibrating plate feeder transports the material to the discharging device;

[0007] The letter pressing device comprises a letter pressing frame, the letter pressing frame is provided with a letter pressing area, and the manipulator can move the material from the discharging device to the letter pressing area; a fixed letter header block and a movable letter header block are arranged on the letter pressing frame, the movable letter header block moves, and the movable letter header block and the fixed letter header block can press letters on both sides of the material;

[0008] A positioning device, the positioning device is arranged near the letter pressing area, the positioning device comprises a positioning column and a material pushing head, and the material pushing head and the positioning column are moved into the letter pressing area to clamp or release the material;

[0009] The material ejection device comprises a material ejection rod, and the material ejection rod is capable of ejecting the material from the lettering area to the conveying device.

[0010] Preferably, the device comprises a workbench, on which a character pressing frame is arranged, the character pressing frame is provided with a fixed character header block frame and a movable character header block frame, and a character pressing area is formed between the fixed character header block frame and the movable character header block frame.

[0011] Preferably, a fixed header block is detachably mounted on the fixed header block frame, and a movable header block is detachably mounted on the movable header block frame, and the movable header block can be moved on the movable header block frame.

[0012] Preferably, a fixing groove is provided on the fixed prefix block frame, the fixed prefix block is installed in the fixing groove, and the fixed prefix block is clearance-matched with the fixing groove;

[0013] The movable character head block frame is provided with a movable groove, the movable character head block is installed in the movable groove, and the movable character head block and the movable groove are in clearance fit;

[0014] Preferably, the letter pressing device further comprises a gas-liquid booster cylinder frame mounted on the workbench, a gas-liquid booster cylinder is mounted on the gas-liquid booster cylinder frame, a pressure head is mounted on the piston of the gas-liquid booster cylinder, and the pressure head is capable of pushing the movable letter head block to move.

[0015] Preferably, the positioning device further comprises a material pushing rack, the material pushing rack is mounted on the workbench, a material pushing cylinder is mounted on the material pushing rack, and a material pushing head is mounted on the piston of the material pushing cylinder;

[0016] The positioning device also includes a positioning frame, and the positioning frame is installed on the workbench. A positioning cylinder is installed on the positioning frame, and a positioning column is installed on the piston of the positioning cylinder.

[0017] Preferably, the positioning column and the pushing head are arranged in a vertical relationship, and the side surface of the positioning column and the end surface of the pushing head are capable of clamping or releasing the material.

[0018] Preferably, the discharging device comprises a discharging rack, which is installed on the workbench, a discharging box is installed on the discharging rack, a discharging area is provided on the discharging box, a detection switch is installed on the discharging box, and the detection switch detects whether there is material in the discharging area.

[0019] Preferably, the manipulator comprises a horizontal motion component, a guide cylinder is mounted on the movable block of the horizontal motion component, a clamping cylinder is mounted on the piston of the guide cylinder, a clamping claw is mounted on the piston of the clamping claw cylinder, and the clamping claw cylinder drives the opening and closing of the clamping claw.

[0020] Preferably, a feed trolley is placed at the end of the conveying device.

[0021] Compared with the prior art, the above technical solution has at least the following beneficial effects:

[0022] In the above scheme, the letter pressing device of the equipment is driven by a gas-liquid booster cylinder, which reduces the influence of the movable head block and the fixed head block on the deformation of the material; the pressing head and the movable head block are pressed by contact, the movable head block and the movable groove clearance are matched, and the fixed head block and the fixed groove clearance are matched, so that the movable head block and the fixed head block have the function of self-alignment, so that the flat area without letters on the movable head block and the fixed head block are close to the left and right sides of the material, ensuring the consistency of the letter pressing depth and the consistency of the size.

[0023] The equipment avoids the impact of the punch press, the letterhead block has a long life, reduces the frequency of replacement, and has low production costs;

[0024] The equipment manufacturing cost is low;

[0025] The equipment is equipped with an automatic control system to control the vibration plate loader, manipulator, discharging device, letter pressing device, positioning device, pushing device and conveying device to achieve automated production with high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 The structure of the vehicle body of the utility model is shown in FIG. Figure 1 ;

[0028] Figure 2 The structure of the vehicle body of the utility model is shown in FIG. Figure 2 ;

[0029] Figure 3 The structure diagram of the double-sided letter pressing device for automobile door hinges of the utility model is shown in FIG. Figure 1 ;

[0030] Figure 4 The structure diagram of the double-sided letter pressing device for automobile door hinges of the utility model is shown in FIG. Figure 2 ;

[0031] Figure 5 The structure diagram of the double-sided letter pressing device for automobile door hinges of the utility model is shown in FIG. Figure 3 .

[0032] Figure 6 for Figure 4A schematic diagram of the structure of the discharge box and other structures;

[0033] Figure 7 for Figure 4 Schematic diagram of the structure of the truss manipulator;

[0034] Figure 8 for Figure 5 A schematic diagram of the structure of the discharging device and other structures.

[0035] The accompanying drawings are described as follows:

[0036] 1. Left body part; 101. Left side; 102. Right side; 103. Deep step groove; 104. Shallow step groove; 2. Vibrating plate loader; 3. Discharge box; 31. Discharge area; 32. Discharge rack; 4. Manipulator; 41. Guide cylinder; 42. Gripper cylinder; 43. Horizontal motion component; 5. Gripper; 6. Positioning cylinder; 61. Positioning rack; 7. Positioning column; 8. Press head; 9. Conveying device; 10. Material cart; 11. Detection switch; 12. Pushing head; 121. Pushing cylinder; 122. Pushing rack; 13. Movable header block; 14. Fixed header block; 15. Gas-liquid booster cylinder; 16. Retracting rod; 17. Pressing rack; 171. Fixed header block rack; 172. Movable header block rack; 18. Gas-liquid booster cylinder rack; 19. Control system. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0039] It should be noted that the terms "up", "down", "left", "right", "front", "back", etc. used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0040] like Figures 1 to 8 As shown, this embodiment provides a double-sided lettering device for automobile door hinges, including a vibrating disc loader 2, a workbench, a manipulator 4, a conveying device 9 and a material cart 10. The discharging part, the discharging device, the lettering device, the positioning device and the pushing device of the vibrating disc loader 2 are installed on the workbench. A discharging device is installed at the feeding outlet of the vibrating disc loader 2, and a detection switch 11 for detecting whether there is material is installed on the discharging device. The vibrating disc loader 2 transports the material to the discharging device. A material cart 10 is placed at the end of the conveying device 9, and the material is transported to the material cart 10 through the conveying device 9. This equipment is equipped with an automatic control system 19 to control the vibrating disc loader 2, the manipulator 4, the discharging device, the lettering device, the positioning device, the pushing device and the conveying device 9 to realize automated production with high production efficiency.

[0041] like Figure 1 and Figure 2 As shown, the material of this embodiment is a body part of a hinge for a car door, and the body part includes a left body part 1 or a right body part. This embodiment takes the left body part as an example. The body part is a hinge installed on the car body, and the door part is a hinge installed on the car door. The left body part 1 is a cross-section of an "L"-shaped shape. The left body part 1 includes a left side 101, a right side 102, a deep step groove 103 and a shallow step groove 104. Different concave characters are pressed on the left side 101 and the right side 102. The difference between the right body part and the left body part 1 is only that the deep step groove 103 and the shallow step groove 104 are swapped. The door part and the body part are similar in shape and are also divided into left and right parts. The equipment of this embodiment can also be used for pressing characters on the door parts. In a car, the number of left and right parts used is the same; in view of the same number of left and right parts used and the same production capacity, two sets of this equipment are symmetrically arranged, one set is used to press characters on the left body part 1, and the other set is used to press characters on the right body part.

[0042] like Figure 2 to Figure 5 As shown, the discharging device includes a discharging frame 32, which is installed on a workbench, and a discharging box 3 is installed on the discharging frame 32, and a discharging area 31 is provided on the discharging box 3. A detection switch 11 is installed on the discharging box 3, and the detection switch 11 detects whether there is material in the discharging area 31. Specifically, the discharging box 33 has a U-shaped opening groove, and the U-shaped opening groove is the discharging area 31, and the U-shaped width is slightly wider than the material width. Specifically, a wire hole is provided on the discharging box 3 in the opening direction of the U-shaped opening groove, and the detection switch 11 is installed in the wire hole.

[0043] In the working process of the discharging device of this embodiment, the detection switch 11 detects whether there is material in the discharging area 31. If material is detected, the detection switch 11 sends a material presence signal to the outside; if no material is detected, the detection switch 11 sends a material absence signal to the outside, and the vibration plate loader 2 works after receiving the material absence signal to transport the material to the discharging area 31 of the material box.

[0044] like Figure 8 As shown, the letter pressing device includes a letter pressing frame 17, and the letter pressing frame 17 is provided with a letter pressing area, so that the manipulator 4 can move the material from the discharge device to the letter pressing area. Specifically, the letter pressing frame 17 and the gas-liquid booster cylinder frame 18 are arranged on the workbench, and the letter pressing frame 17 is provided with a fixed letter header block frame 171 and a movable letter header block frame 172, and a letter pressing area is formed between the fixed letter header block frame 171 and the movable letter header block frame 172. A fixed header block 14 is detachably mounted on the fixed header block frame 171, and is arranged perpendicular to the right side 102 of the material. A movable header block 13 is detachably mounted on the movable header block frame 172, and is arranged perpendicular to the left side 101 of the material. The movable header block 13 can be moved on the movable header block frame 172. A gas-liquid booster cylinder 15 is mounted on the gas-liquid booster cylinder frame 18, and a pressure head 7 is mounted on the piston of the gas-liquid booster cylinder 15, and the pressure head 7 can push the movable header block 13 to move. Furthermore, a fixed groove is provided on the fixed header block frame 171, and the fixed header block 14 is installed in the fixed groove, and the fixed header block 14 and the fixed groove are in clearance. A movable groove is provided on the movable header block frame 172, and the movable header block 13 is installed in the movable groove, and the movable header block 13 and the movable groove are in clearance. Specifically, a spring is installed in the movable groove, one end of the spring is connected to the movable groove, and the other end of the spring is connected to the movable head block 13. The gas-liquid booster cylinder 15 of this embodiment is used as a power source, and can also be a pressure mechanism such as an oil cylinder or an electric cylinder.

[0045] During the working process of the character pressing device of this embodiment, the material is placed in the character pressing area, and the material is located between the fixed character header block 14 and the movable character header block 13. The gas-liquid booster cylinder 15 is driven, and the piston of the gas-liquid booster cylinder 15 extends outward, and the piston drives the pressure head 7 forward to press the movable character header block 13. The movable character header block 13 moves in the movable groove and pops out for compression. During this process, the movable character header block 13 pushes the left side 101 of the material to make the material move horizontally as a whole, until the right side 102 of the material is close to the fixed character header block 14; the gas-liquid booster cylinder 15 is continued to be driven, and the piston continues to drive the pressure head 7 forward to push the movable character header block 13, and the spring continues to be compressed, and the movable character header block 13 and the fixed character header block 14 continue to press the material, completing the character pressing of the left side 101 and the right side 102 of the material. After the character pressing is completed, the gas-liquid booster cylinder 15 is driven, and the piston of the gas-liquid booster cylinder 15 retreats, and the piston retreats with the pressure head 7, and the movable character header block 13 moves outward under the action of the spring and returns to the position before the character pressing.

[0046] The pressing device of this embodiment uses two header blocks, namely, a movable header block 13 and a fixed header block 14, to press characters on both sides, and uses a gas-liquid booster cylinder 15 to realize single-power drive. The pressing device is driven by the gas-liquid booster cylinder 15, and the output force of the gas-liquid booster cylinder 15 is changed by adjusting the compressed air pressure of the gas-liquid booster cylinder 15, thereby reducing the influence of the movable header block 13 and the fixed header block 14 on the deformation of the material. The pressing head 7 and the movable header block 13 of this embodiment adopt contact pressing, the movable header block 13 is matched with the clearance of the movable groove, and the fixed header block 14 is matched with the clearance of the fixed groove, so that the movable header block 13 and the fixed header block 14 have the function of self-alignment, so that the flat area without characters on the movable header block 13 and the fixed header block 14 is close to the left side 101 and the right side 102 of the material, ensuring the consistency of the pressing depth and the consistency of the size. If the flat area without characters on the movable character head block 13 and the fixed character head block 14 is not completely attached to the left side 101 and the right side 102 of the material, respectively, the movable character head block 13 and the fixed character head block 14 cannot continue to press the material and cannot press characters, thus avoiding the problem of inconsistent pressing depth. The device of the embodiment avoids the impact of the punch press, the character head block for pressing characters has a long service life, reduces the replacement frequency, and has a low production cost.

[0047] For example Figure 8 As shown, the positioning device is arranged near the word pressing area, and the positioning device includes a positioning column 7 and a push head 12. The push head 12 and the positioning column 7 are moved into the word pressing area to clamp or release the material. Specifically, the positioning device also includes a push rack 122, which is installed on the workbench, and a push cylinder 121 is installed on the push rack 122, and the push head 12 is installed on the piston of the push cylinder 121; the positioning device also includes a positioning frame 61, which is installed on the workbench, and a positioning cylinder 6 is installed on the positioning frame 61, and the positioning column 7 is installed on the piston of the positioning cylinder 6. The positioning column 7 and the push head 12 are arranged in a vertical relationship, and the end face of the push head 12 on the side of the positioning column 7 can clamp or release the material.

[0048] The positioning device of this embodiment works by clamping the material, and the material is located in the word pressing area, driving the positioning cylinder 6 and the pushing cylinder 121, the piston of the positioning cylinder 6 drives the positioning column 7 to extend outward in a direction perpendicular to the left side 101 of the material, and the piston of the pushing cylinder 121 drives the pushing head 12 to extend outward in a direction perpendicular to the movement direction of the positioning column 7, the positioning column 7 is located on one side of the material, and the pushing head 12 presses the material against the positioning column 7, completing the clamping of the material by the positioning column 7 and the pushing head 12. Release the material, drive the positioning cylinder 6 and the pushing cylinder 121, the piston of the positioning cylinder 6 drives the positioning column 7 to retract inward, and the piston of the pushing cylinder 121 drives the pushing head 12 to retract inward.

[0049] The material return device of this embodiment includes a material return rod 16, and a power source of the material return rod 16 is installed on the letter pressing frame 17. The material return rod 16 is installed on the power source of the material return rod 16. When the power source of the material return rod 16 is driven, the material return rod 16 can be extended outward or retracted inward.

[0050] like Figure 7 As shown, the manipulator 4 includes a horizontal motion component 43, a guide cylinder 41 is installed on the movable block of the horizontal motion component 43, a cylinder 42 is installed on the piston of the guide cylinder 41, a clamping claw 5 is installed on the piston of the clamping claw cylinder 42, and the clamping claw cylinder 42 drives the clamping claw 5 to open and close. Specifically, the clamping direction of the clamping claw 5 is perpendicular to the discharging movement direction of the vibrating plate loader 2.

[0051] In the working process of the manipulator 4 of this embodiment, the horizontal motion component 43 can drive the movable block to move horizontally, the movable block moves horizontally with the guide cylinder 41, the guide cylinder 41 moves horizontally with the clamp cylinder 42, the clamp cylinder 42 moves horizontally with the clamp 5, and the clamp 5 moves horizontally with the material. The guide cylinder 41 drives, the piston of the guide cylinder 41 moves vertically, the piston of the guide cylinder 41 moves vertically with the clamp cylinder 42, so that the clamp cylinder 42 moves vertically with the clamp 5, and the clamp 5 moves vertically with the material to take the material out of the discharge box 3. The manipulator 4 of this embodiment realizes the horizontal and vertical movement of the material. The clamp cylinder 42 drives the clamp 5 to open, the manipulator 4 moves to the material, the clamp cylinder 42 drives the clamp 5 to close, and the clamp 5 clamps the material; the clamp cylinder 42 drives the clamp 5 to open, and the clamp 5 releases the material.

[0052] This embodiment uses two sets of automobile door hinge double-sided lettering equipment symmetrically arranged, and the two sets of equipment use one set of electric control and start. This equipment uses a vibration plate feeder 2, a manipulator 4 and a material return device to realize automatic loading and unloading. This equipment is equipped with an electrical and control system 19 to realize automated processing with high production efficiency. The manufacturing cost of this equipment is low.

[0053] The working process of the double-sided lettering device for automobile door hinges of this embodiment is as follows:

[0054] The vibrating plate feeder 2 is started, and the vibrating plate feeder 2 conveys the material to the discharge area 31 of the discharge box 3. The detection switch 11 detects the presence of material and sends a material presence signal to the outside;

[0055] The manipulator 4 receives a signal that there is material, drives the horizontal motion component 43 and the guide cylinder 41, and moves the manipulator 4 to the material discharging area 31. At this time, the clamp 5 is in an open state, and the clamp 5 moves to the material, drives the clamp cylinder 42, and the clamp 5 closes to clamp the material; drives the horizontal motion component 43 and the guide cylinder 41, and moves the manipulator 4 to the lettering area, drives the clamp cylinder 42, and the clamp 5 opens, and the material is placed in the lettering area, and the manipulator 4 continues to move to clamp another material;

[0056] The positioning device is started, the positioning column 7 and the push head 12 extend outward, and the push head 12 presses the material against the positioning column 7;

[0057] The letter pressing device is started, and the movable letter head block 13 and the fixed letter head block 14 press the letter on the left side 101 and the right side 102 of the material, and the letter pressing is completed;

[0058] The positioning device is started, the pusher head 12 and the positioning column 7 are retracted inwards, and the pusher head 12 and the positioning column 7 are no longer in contact with the material;

[0059] The material return device is started, and the material return rod 16 extends outward to push the material from the lettering area to the conveying device 9;

[0060] The conveying device 9 conveys the materials into the material cart 10 .

[0061] The above are only specific implementation methods of the present utility model, but the protection scope of the present utility model is not limited thereto. The protection scope of the present utility model shall be based on the protection scope of the claims.

Claims

1. A double-sided lettering device for automobile door hinges, characterized in that: It includes a vibrating plate loader, a discharging device is installed at the loading outlet of the vibrating plate loader, a detection switch for detecting whether there is material is installed on the discharging device, and the vibrating plate loader transports the material to the discharging device; The letter pressing device comprises a letter pressing frame, the letter pressing frame is provided with a letter pressing area, and the manipulator can move the material from the discharging device to the letter pressing area; a fixed letter header block and a movable letter header block are arranged on the letter pressing frame, the movable letter header block moves, and the movable letter header block and the fixed letter header block can press letters on both sides of the material; A positioning device, the positioning device is arranged near the letter pressing area, the positioning device comprises a positioning column and a material pushing head, and the material pushing head and the positioning column are moved into the letter pressing area to clamp or release the material; The material return device includes a material return rod, and the material return rod is capable of pushing the material out of the lettering area to the conveying device.

2. The double-sided lettering device for automobile door hinges according to claim 1, characterized in that: The device comprises a workbench, on which a character pressing frame is arranged, the character pressing frame is provided with a fixed character header block frame and a movable character header block frame, and a character pressing area is formed between the fixed character header block frame and the movable character header block frame.

3. The double-sided lettering device for automobile door hinges according to claim 2, characterized in that: A fixed header block is detachably mounted on the fixed header block frame, and a movable header block is detachably mounted on the movable header block frame. The movable header block can be moved on the movable header block frame.

4. The double-sided lettering device for automobile door hinges according to claim 3, characterized in that: The fixed character block frame is provided with a fixed groove, the fixed character block is installed in the fixed groove, and the fixed character block and the fixed groove are in clearance fit; The movable character head block frame is provided with a movable groove, the movable character head block is installed in the movable groove, and the movable character head block is clearance-matched with the movable groove.

5. The double-sided lettering device for automobile door hinges according to claim 2, characterized in that: The letter pressing device also includes a gas-liquid booster cylinder frame installed on the workbench, a gas-liquid booster cylinder is installed on the gas-liquid booster cylinder frame, a pressure head is installed on the piston of the gas-liquid booster cylinder, and the pressure head can push the movable letter head block to move.

6. The double-sided lettering device for automobile door hinges according to claim 1, characterized in that: The positioning device also includes a material pushing rack, which is installed on the workbench, a material pushing cylinder is installed on the material pushing rack, and a material pushing head is installed on the piston of the material pushing cylinder; The positioning device also includes a positioning frame, and the positioning frame is installed on the workbench. A positioning cylinder is installed on the positioning frame, and a positioning column is installed on the piston of the positioning cylinder.

7. The double-sided lettering device for automobile door hinges according to claim 5, characterized in that: The positioning column and the pushing head are arranged in a vertical relationship, and the side surface of the positioning column and the end surface of the pushing head are capable of clamping or releasing the material.

8. The double-sided lettering device for automobile door hinges according to claim 2, characterized in that: The discharging device comprises a discharging rack, which is mounted on the workbench, a discharging box is mounted on the discharging rack, a discharging area is provided on the discharging box, a detection switch is mounted on the discharging box, and the detection switch detects whether there is material in the discharging area.

9. The double-sided lettering device for automobile door hinges according to claim 2, characterized in that: The manipulator comprises a horizontal motion component, a guide cylinder is mounted on the movable block of the horizontal motion component, a clamping cylinder is mounted on the piston of the guide cylinder, a clamping claw is mounted on the piston of the clamping claw cylinder, and the clamping claw cylinder drives the clamping claw to open and close.

10. The double-sided lettering device for automobile door hinges according to claim 1, characterized in that: A feed car is placed at the end of the conveying device.

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