Automobile safety belt mortise lock machining method and mold thereof

Abstract

The invention provides an automobile safety belt mortise lock machining method and a mold thereof, and belongs to the technical field of automobile manufacturing. The problem that an existing automobile safety belt mortise lock is low in qualification rate is solved. The machining method for the mortise lock of the automobile safety belt comprises the steps of a, riveting assembly; b, plastic deformation; and c, riveting a finished product. The automobile safety belt mortise lock die comprises an upper die and a lower die, the lower die is fixedly connected with two nitrogen springs, piston rods of the two nitrogen springs are both fixedly connected to a moving block, the lower die is fixedly connected with a mounting seat, the mounting seat is provided with a limiting part, the limiting part is provided with an abutting part, the middle of the moving block is fixedly connected with a stretching block, the stretching block is provided with a boss, and the mounting seat is provided with a sliding groove. Two extrusion blocks are arranged in the sliding groove, the backs of the two extrusion blocks are both provided with first inclined faces inclining downwards, the upper die is provided with two pressing blocks, and the bottoms of the two pressing blocks are both provided with second inclined faces. According to the automobile safety belt mortise lock machining method, deformation restoring force generated after the steel wire rope is bent is eliminated, and the automobile safety belt mortise lock die works stably and is high in yield.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile manufacturing, in particular to a processing method of automobile safety belt latch and a die thereof. BACKGROUND

[0002] The automobile safety belt latch is an important part of the safety belt system, which directly determines the safety of the automobile. Figure 1 As shown in the figure, the existing automobile safety belt latch comprises a bracket 1, a steel wire rope 2 and a clamping block 3. The two ends of the steel wire rope 2 are respectively threaded through the threading part 21 of the bracket 1. The two ends of the steel wire rope 2 threaded out of the threading part 21 are respectively riveted with a rivet head 4. The clamping block 3 is arranged in the space formed by the bending of the steel wire rope 2. The two sides of the clamping block 3 are respectively provided with a bent riveting part 31. The riveting part 31 and the corresponding side surface of the clamping block 3 form a limiting groove for accommodating the steel wire rope 2. The two riveting parts 31 are riveted inward to make the steel wire rope 2 and the clamping block 3 fixedly connected.

[0003] However, after the steel wire rope 2 is bent, the deformation recovery force of the steel wire rope 2 acts on the clamping block 3, which forms a tension outwardly expanding to both sides at the two riveting parts 31. This not only affects the riveting effect of the riveting part 31, but also reduces the upper limit of the anti-disengagement force (the steel wire rope 2 is easy to disengage from the clamping block 3 when subjected to the impact force of the automobile), and the qualified rate of the product is not high. SUMMARY

[0004] The present application aims to solve the above problems in the prior art, and provides a processing method of automobile safety belt latch and a die thereof, and the technical problem to be solved is how to eliminate the deformation recovery force of the steel wire rope to improve the qualified rate of the product.

[0005] The purpose of the present application can be achieved by the following technical scheme: a processing method of automobile safety belt latch, characterized in that the processing method comprises the following steps: a. Riveting assembly: threading the two ends of the steel wire rope through the threading part of the bracket, respectively riveting the two ends of the steel wire rope threaded out of the threading part with a rivet head; b. Plastic deformation: loading the bracket and the steel wire rope after step a into the die, the die limiting the bracket and the steel wire rope, the die working on the two parts of the steel wire rope for clamping block riveting to perform plastic deformation to eliminate the deformation recovery force of the steel wire rope after bending, so that the two parts of the steel wire rope for clamping block riveting form a plastic deformation section without outward expansion tension, and then unloading from the die; c. Riveting finished product: loading the clamping block into the bending part of the steel wire rope after step b, embedding the plastic deformation section of the steel wire rope into the limiting groove of the clamping block, and then riveting the riveting part of the clamping block with the plastic deformation section to form a finished product.

[0006] In the above-mentioned method for processing automotive seat belt latches, the characteristic is that in step b, the mold uses two extrusion blocks to press inward the two parts of the steel wire rope supply block riveting, so that the tensile force on the steel wire rope is 18-30KN, and the extrusion cycle is 8-15s, thereby forming a plastic deformation section.

[0007] This invention also provides a car seat belt latch mold, including an upper mold and a lower mold. The lower mold is characterized by having two parallel nitrogen springs fixedly connected to it, with the piston rods of both nitrogen springs fixedly connected to a movable block. The lower mold is also fixedly connected to a mounting seat located between the two nitrogen springs. The mounting seat has a limiting part for placing a bracket, and the limiting part has a abutting part for two through-holes to abut against each other. A tension block is fixedly connected to the middle of the movable block, facing the mounting seat. The tension block has a boss for the bending part of the wire rope to be fitted onto. The mounting seat has a sliding groove located between the tension block and the limiting part. Two extrusion blocks are provided in the sliding groove, and the back of each extrusion block has a downwardly sloping inclined surface. The upper mold has two pressure blocks corresponding to the two extrusion blocks, and the bottom of each pressure block has a second inclined surface for conforming to the corresponding inclined surface.

[0008] In the aforementioned automotive seatbelt lock mold, the limiting part is a limiting block embedded in the mounting base, the limiting block is fixedly connected to the mounting base by bolts, and the abutting part is two protrusions on the top of the limiting block.

[0009] In the aforementioned automotive seatbelt locking mold, the mounting base has two guide holes, and the upper mold has guide pins for inserting into the guide holes.

[0010] In the aforementioned automotive seatbelt locking mold, the mounting base has a guide groove parallel to the nitrogen spring, and the tension block is located in the guide groove.

[0011] In the aforementioned automotive seatbelt lock mold, the extrusion surface of the extrusion block is an arc surface.

[0012] In the aforementioned automotive seatbelt lock mold, both extrusion blocks have protruding steps on their sides. The mounting base is fitted with two stops, which are fixed to the mounting base by screws. Each stop has a shoulder for blocking the corresponding step. A spring is provided between the two extrusion blocks to allow them to return to their original position relative to each other.

[0013] Compared with existing technologies, this automotive seat belt locking processing method eliminates the deformation recovery force after the steel wire rope bends, ensures the riveting effect with the locking block, has good safety in use, good product consistency, and a high product qualification rate.

[0014] In addition, the compact structure and good working stability of the car seat belt locking mold result in good plastic deformation of the wire rope and a high yield. Attached Figure Description

[0015] Figure 1 This is a 3D structural diagram of an existing car seatbelt latch.

[0016] Figure 2 This is a flowchart of the manufacturing process for the automotive seatbelt latch.

[0017] Figure 3 This is a 3D structural diagram of the automotive seatbelt latch mold.

[0018] Figure 4 This is a three-dimensional structural diagram of the lower mold in this automotive seatbelt lock mold.

[0019] Figure 5 This is a top view of the lower mold in the automotive seatbelt locking mold.

[0020] Figure 6 This is a top view of the lower mold in use when the car seat belt lock mold is in use.

[0021] Figure 7 This is a three-dimensional structural diagram of the upper mold in this automotive seatbelt lock mold.

[0022] Figure 8 This is a three-dimensional structural diagram of the extrusion block in the mold for the car seat belt lock.

[0023] In the diagram, 1. Bracket; 2. Wire rope; 21. Passing part; 3. Clamping block; 31. Riveting part; 4. Riveting joint; 5. Upper mold; 6. Lower mold; 7. Nitrogen spring; 8. Moving block; 9. Mounting base; 91. Guide hole; 10. Tensioning block; 101. Boss; 11. Extrusion block; 111. Inclined surface one; 112. Step; 12. Pressure block; 121. Inclined surface two; 13. Limiting block; 131. Protrusion; 14. Guide post; 15. Stop block; 151. Shoulder; 16. Spring. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0025] like Figure 2 As shown, a method for processing an automotive seatbelt latch includes the following steps: a. Riveting assembly: Pass both ends of the wire rope through the through-hole of the bracket, and rivet the two ends of the wire rope that pass through the through-hole to the rivet joints. b. Plastic Deformation: After completing step a, the bracket and wire rope are loaded into the mold. The mold limits the bracket and wire rope. The working of the mold plastically deforms the two parts of the wire rope supply block riveting to eliminate the deformation recovery force after the wire rope is bent, so that the two parts of the wire rope supply block riveting form a plastic deformation section without outward expansion force, and then unloads from the mold. c. Riveting the finished product: Insert the clamp into the bend of the wire rope after step b, so that the plastic deformation sections of the wire rope are respectively embedded in the limiting groove of the clamp. Then, rivet the clamp with the plastic deformation section to form the finished product.

[0026] This automotive seatbelt locking processing method eliminates the deformation recovery force of the steel wire rope 2 after bending through plastic deformation. The part of the steel wire rope 2 that is riveted to the buckle 3 has no outward expansion force due to the plastic deformation section, which ensures the riveting effect with the buckle 3. The connection between the buckle 3 and the plastic deformation section is stable, with great anti-loosening force, good safety in use, good product consistency, and high product qualification rate.

[0027] To elaborate further, in step b, the mold uses two extrusion blocks 11 to press inward the two parts of the wire rope 2 that are riveted to the clamping block 3, so that the tensile force on the wire rope 2 is 18-30KN, and the extrusion cycle is 8-15s, thereby forming a plastic deformation section.

[0028] The steel wire rope is plastically deformed by extrusion, which is convenient and efficient to manufacture. The tensile force on the steel wire rope 2 is inversely proportional to the extrusion cycle. The proper correspondence between the tensile force and the extrusion cycle effectively ensures the formation of the plastic deformation segment and prevents the steel wire rope 2 from breaking or failing to deform completely. In actual manufacturing, when the tensile force on the steel wire rope 2 is 18 KN, the extrusion cycle is 15s; when the tensile force on the steel wire rope 2 is 25 KN, the extrusion cycle is 11s; and when the tensile force on the steel wire rope 2 is 30 KN, the extrusion cycle is 8s. In this embodiment, the tensile force on the steel wire rope 2 is 20 KN, and the extrusion cycle is 13s.

[0029] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, this automotive seatbelt locking mold includes an upper mold 5 and a lower mold 6. The lower mold 6 is fixedly connected to two parallel nitrogen springs 7. The piston rods of the two nitrogen springs 7 are fixedly connected to a moving block 8. The lower mold 6 is fixedly connected to a mounting base 9 located between the two nitrogen springs 7. The mounting base 9 has a limiting part for placing the bracket 1. The limiting part has a supporting part for the two through parts 21 to abut against each other. The middle part of the moving block 8 is fixedly connected to a tension block 10 facing the mounting base 9 by bolts. The tension block 10 has a boss 101 for the bending part of the wire rope 2 to be fitted. The mounting base 9 has a sliding groove located between the tension block 10 and the limiting part. Two extrusion blocks 11 are provided in the sliding groove. The back of the two extrusion blocks 11 has a downward inclined surface 111. The upper mold 5 has two pressure blocks 12 corresponding to the two extrusion blocks 11. The bottom of the two pressure blocks 12 has an inclined surface 121 for fitting the corresponding inclined surface 111.

[0030] When using this automotive seatbelt locking mold, the upper mold 5 is driven up and down by the existing punch press slide, and the lower mold 6 is fixed on the worktable. The riveted and assembled bracket 1 and wire rope 2 are placed in the limiting part, and the bracket 1 is supported by the limiting part. The two through parts 21 abut against the two abutting parts respectively. The bent part of the wire rope 2 is sleeved on the boss 101. The two pressing blocks 11 are located on the outside of the two parts where the wire rope 2 is riveted by the clamping block 3. Then the upper mold 5 descends, and the inclined surfaces 121 of the two pressing blocks 12 respectively correspond to the inclined surfaces 111 of the two pressing blocks 11, so that the two pressing blocks 121... 1. The wire rope 2 is pushed along the chute and converges towards the center of the chute, causing the two extrusion blocks 11 to respectively extrude the two parts of the wire rope 2 that are riveted to the clamping block 3. The abutment part limits the insertion part 21, preventing the two ends of the wire rope 2 from moving. The extrusion force generated by the two extrusion blocks 11 causes the wire rope 2 to drive the tension block 10 to move towards the limiting part. The two nitrogen springs 7 provide a counter-thrust force, thereby causing the two parts of the wire rope 2 that are riveted to the clamping block 3 to undergo plastic deformation, forming a plastic deformation section without outward expansion force. Then, the upper mold 5 rises and resets, unloading the bracket 1 and wire rope 2, which have completed plastic deformation, from the mold. This automotive seat belt lock mold has a compact structure, good limiting effect on the wire rope 2, smooth extrusion process, good extrusion effect, and high yield.

[0031] In this embodiment, the limiting part is a limiting block 13 embedded in the mounting base 9. The limiting block 13 is fixed to the mounting base 9 by bolts, and the abutting part is two protrusions 131 on the top of the limiting block 13. This makes manufacturing convenient, the limiting block 13 is replaceable, and the cost of use is low.

[0032] The mounting base 9 has two guide holes 91, and the upper die 5 has guide posts 14 for inserting into the guide holes 91. This ensures high precision in the mating of the upper die 5 and the lower die 6 during die closing, guaranteeing extrusion accuracy and good product consistency.

[0033] Mounting base 9 has a guide groove parallel to nitrogen spring 7. The tension block 10 is located in the guide groove, which guides and limits the tension block 10, resulting in good structural stability. The tension block 10 moves smoothly within the guide groove and does not wobble under force, improving processing accuracy. The extrusion surface of the extrusion block 11 is an arc surface, preventing damage to the wire rope 2 under extrusion and ensuring smooth and effective plastic deformation of the wire rope 2.

[0034] Both extrusion blocks 11 have protruding steps 112 on their sides. The mounting base 9 is fitted with two stops 15. The two stops 15 are fixed to the mounting base 9 by screws. The stops 15 have shoulders 151 for blocking the corresponding steps 112. A spring 16 is provided between the two extrusion blocks 11 to make the two extrusion blocks 11 move away from each other and reset. During assembly, the two extrusion blocks 11 are first placed into the chute, with the bottom surfaces of the two extrusion blocks 11 adhering to the bottom of the chute. Then, the stop block 15 is embedded into the mounting base 9, and the screw passes through the stop block 15 and is threadedly connected to the mounting base 9 to achieve a fixed connection between the stop block 15 and the mounting base 9. One side of the extrusion block 11 is in contact with the chute wall, and the other side of the extrusion block 11 is in contact with the side of the stop block 15. This prevents the extrusion block 11 from shaking when sliding. The shoulder 151 and the step 112 work together to make the extrusion block 11 lift up, ensuring the extrusion effect. The lower part of the extrusion surface of the two extrusion blocks 11 does not participate in the extrusion action. The lower part of the extrusion surface has blind holes. The two ends of the spring 16 are respectively located in the blind holes of the two extrusion blocks 11, and the spring 16 is limited. When the upper mold 5 is separated from the lower mold 6, the two extrusion blocks 11 move away from each other and reset, which facilitates the unloading of the steel wire rope 2 and the bracket 1 after plastic deformation.

[0035] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A method for processing an automotive seatbelt latch, characterized in that, The processing method includes the following steps: a. Riveting assembly: Pass both ends of the wire rope through the through-hole of the bracket, and rivet the two ends of the wire rope that pass through the through-hole to the rivet joints. b. Plastic Deformation: After completing step a, the bracket and wire rope are loaded into the mold. The mold limits the bracket and wire rope. The working of the mold plastically deforms the two parts of the wire rope supply block riveting to eliminate the deformation recovery force after the wire rope is bent, so that the two parts of the wire rope supply block riveting form a plastic deformation section without outward expansion force, and then unloads from the mold. c. Riveting the finished product: Insert the clamp into the bend of the wire rope after step b, so that the plastic deformation sections of the wire rope are respectively embedded in the limiting groove of the clamp. Then, rivet the clamp with the plastic deformation section to form the finished product.

2. The method for processing automotive seatbelt latches according to claim 1, characterized in that, In step b, the mold uses two extrusion blocks (11) to press the two parts of the wire rope supply block riveting inward, so that the tensile force on the wire rope is 18-30KN and the extrusion cycle is 8-15s, thereby forming a plastic deformation section.

3. A car seatbelt latch mold, comprising an upper mold (1) and a lower mold (6), characterized in that, The lower mold (6) is fixedly connected to two parallel nitrogen springs (7), and the piston rods of the two nitrogen springs (7) are fixedly connected to a movable block (8). The lower mold (6) is fixedly connected to a mounting base (9) located between the two nitrogen springs (7). The mounting base (9) has a limiting part for placing the bracket, and the limiting part has a abutting part for the two through parts to abut against each other. A tension block (10) is fixedly connected to the middle of the movable block (8) and faces the mounting base (9). The tension block (10) has a... There is a boss (101) for the bending part of the wire rope. The mounting base (9) has a groove between the tension block (10) and the limiting part. Two extrusion blocks (11) are provided in the groove. The back of the two extrusion blocks (11) has a downward inclined surface (111). The upper mold (1) has two pressure blocks (12) corresponding to the two extrusion blocks (11). The bottom of the two pressure blocks (12) has an inclined surface (121) for fitting the corresponding inclined surface (111).

4. The method for processing an automotive seatbelt latch according to claim 3, characterized in that, The limiting part is a limiting block (13) embedded in the mounting base (9). The limiting block (13) is fixedly connected to the mounting base (9) by bolts. The abutting part is two protrusions (131) on the top of the limiting block (13).

5. The method for processing an automotive seatbelt latch according to claim 4, characterized in that, The mounting base (9) has two guide holes (91), and the upper mold (1) has guide posts (14) for inserting into the guide holes (91).

6. The method for processing an automotive seatbelt latch according to claim 5, characterized in that, The mounting base (9) has a guide groove parallel to the nitrogen spring (7), and the tension block (10) is located in the guide groove.

7. The method for processing an automotive seatbelt latch according to claim 6, characterized in that, The extrusion surface of the extrusion blocks (12) and (11) is an arc surface.

8. The method for processing an automotive seatbelt latch according to claim 7, characterized in that, Both extrusion blocks (11) have protruding steps (112) on their sides. The mounting base (9) is fitted with two stops (15). The two stops (15) are fixed to the mounting base (9) by screws. The stops (15) have shoulders (151) for blocking the corresponding steps (112). A spring (16) is provided between the two extrusion blocks (11) to make the two extrusion blocks (11) move away from each other and reset.

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