Protection assembly for ejection of long and thin rod piece cold heading die

Abstract

The utility model relates to the field of protection assemblies, in particular to a protection assembly for ejecting a thin and long rod piece cold heading die, which comprises an ejector pin, one end of a sliding rod is connected in a sliding groove arranged on the inner side of the ejector pin in a sliding mode, a first piston and a second piston are connected in the sliding groove in a sliding mode, and a first spring is arranged between the first piston and the sliding rod. A second spring is arranged between the second piston and the inner wall of the sliding groove, a partition block is fixedly connected to the inner wall of the sliding groove, the partition block is located between the first piston and the second piston, a through hole is formed in the partition block, and a buffer solution is arranged between the first piston and the second piston; in the ejection process of a part, the first spring can play a buffering role; when the part is produced, one end of the part can make contact with the ejector block, when the part extrudes the ejector block, the first spring can slightly extrude the ejector block at the moment, the buffering effect can be achieved, damage to the ejector block is reduced, and the buffering solution is arranged between the first piston and the second piston and can achieve the buffering effect.

Description

Technical Field

[0001] The utility model relates to the field of protection components, in particular to a protection component for ejecting a cold heading die of a slender rod. Background Art

[0002] Existing cold heading equipment is often used to produce slender products. After production, the existing cold heading equipment will eject the slender workpiece through the ejection mechanism in the cold heading equipment. The longer the workpiece produced by the existing cold heading equipment, the longer the ejector pin in the ejection mechanism will be. To prevent the ejector pin from being damaged during processing, a protective structure is used to protect the ejector pin. The existing cold heading die ejection protective structure, such as a mold ejection protection mechanism with publication number CN111451432A, includes a rear ejector pin, an ejector pin protective sleeve, an ejector pin, a rear seat, a mold cavity, and a cushion mold, a top mold, and a mold shell located in the mold cavity. The rear ejector pin is connected to one end of the ejector pin, and the other end of the ejector pin is against the part to be processed. The ejector pins are all located in the ejector pin protective sleeve and the top mold. The outer periphery of the ejector pin protective sleeve is tightly attached to the cushion mold and the top mold for stability. The mold shell is between the cushion mold, the top mold and the mold cavity, and the side of the mold cavity is connected to the rear seat. The rear seat is used to stabilize the entire mold cavity device when the ejector pin ejects the part.

[0003] The above protection mechanism is fully movable in the mold and the ejector protection sleeve through the ejector pin. All of them are constrained and there is no space for radial displacement, so the ejector pin will not break. However, in actual use, one end of the ejector pin will contact the part, causing the ejector pin to be stressed during production. Over time, the ejector pin will inevitably be damaged. For this reason, we propose a protection component for ejection of slender rod cold heading dies. Utility Model Content

[0004] The utility model aims to provide a protective assembly for ejecting a cold heading die of a slender rod, comprising an ejector pin, one end of a slide rod being slidably connected in a slide groove provided on the inner side of the ejector pin, a piston 1 and a piston 2 being slidably connected in the slide groove, a spring 1 being provided between the piston 1 and the slide rod, a spring 2 being provided between the piston 2 and the inner wall of the slide groove, a spacer being fixedly connected to the inner wall of the slide groove, the spacer being located between the piston 1 and the piston 2 and provided with a through hole, a buffer being provided between the piston 1 and the piston 2, and an end of the slide rod away from the spring 1 being fixedly connected to the ejector block.

[0005] Preferably, a limiting block is fixedly connected to the outer wall of the sliding rod, and the limiting block is slidably connected to a limiting groove provided in the ejector pin.

[0006] Preferably, the ejector pin and the ejector block are both slidably connected in the inner cavity of the protective sleeve.

[0007] Preferably, one end of the protective sleeve is fixedly connected to a threaded seat, a screw is threadedly connected to the inner side of the threaded seat, one end of the screw is fixedly connected to a rotating piece, and the rotating piece is rotatably connected in the inner cavity of the ejector pin.

[0008] Preferably, one end of the screw rod away from the rotating member is fixedly connected to a hand wheel.

[0009] Preferably, a rear seat is fixedly sleeved on the outer wall of the protective sleeve, the rear seat is fixedly connected to the mold shell, a top mold is arranged in the mold shell, and a cushion mold is arranged between the rear seat, the top mold and the protective sleeve.

[0010] Preferably, the ejector pin and the ejector block are matched with the inner cavity of the ejector mold.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the process of ejecting the parts, the utility model can play a buffering role through the spring 1; when the parts are produced, one end of the parts will contact the ejection block. When the parts squeeze the ejection block, the spring 1 will slightly squeeze the ejection block to play a buffering role, thereby reducing the damage to the ejection block. Secondly, a buffer is provided between the piston 1 and the piston 2, and the buffer can play a buffering role.

[0013] 2. Use buffer to prevent spring 1 and spring 2 from being squeezed over a long distance during production, thereby affecting the processing of parts. When spring 1 is slightly squeezed, piston 1 will move slightly to squeeze the buffer between piston 1 and the spacer through the through hole on the spacer and between the spacer and piston 2. At this time, piston 2 will move slightly, causing spring 2 to be slightly squeezed as well. Then the squeezed spring 1 and spring 2 will reset. At this time, due to the effect of the buffer, spring 1 and spring 2 will slowly reset, reducing the impact on part processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of area A.

[0016] In the figure: 1. ejector pin; 2. slide rod; 3. slide groove; 4. piston 1; 5. piston 2; 6. spring 1; 7. spring 2; 8. spacer; 9. ejector block; 10. limit block; 11. limit groove; 12. protective cover; 13. threaded seat; 14. screw; 15. rotating part; 16. hand wheel; 17. back seat; 18. mold shell; 19. ejector mold; 20. cushion mold. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0018] See also Figure 1 - Figure 2 The figure shows a protective assembly for ejecting a cold heading die for a slender rod of the utility model, comprising an ejector pin 1, one end of a slide rod 2 being slidably connected to a slide groove 3 provided on the inner side of the ejector pin 1, a piston 4 and a piston 2 5 being slidably connected in the slide groove 3, a spring 6 being provided between the piston 1 4 and the slide rod 2, a spring 2 7 being provided between the piston 2 5 and the inner wall of the slide groove 3, a spacer 8 being fixedly connected to the inner wall of the slide groove 3, the spacer 8 being located between the piston 1 4 and the piston 2 5 and having a through hole provided on the spacer 8, a buffer being provided between the piston 1 4 and the piston 2 5, and an end of the slide rod 2 away from the spring 6 being fixedly connected to an ejector block 9.

[0019] A limit block 10 is fixedly connected to the outer wall of the slide rod 2, and the limit block 10 is slidably connected to a limit groove 11 opened in the ejector pin 1; by arranging the limit block 10 on the outer wall of the slide rod 2, and the limit block 10 is slidably connected to the limit groove 11, the sliding range of the slide rod 2 in the ejector pin 1 is limited.

[0020] The ejector pin 1 and the ejector block 9 are both slidably connected in the inner cavity of the protective sleeve 12; the ejector pin 1 and the ejector block 9 can be protected by the protective sleeve 12.

[0021] One end of the protective sleeve 12 is fixedly connected to the threaded seat 13, the inner side of the threaded seat 13 is threadedly connected with a screw 14, one end of the screw 14 is fixedly connected to a rotating member 15, and the rotating member 15 is rotatably connected in the inner cavity of the ejector pin 1; since the inner side of the threaded seat 13 is threadedly connected to the screw 14, the rotation of the screw 14 will drive the ejector pin 1 to move, and the ejector pin 1 will drive the ejector block 9 to move after moving a certain distance.

[0022] One end of the screw rod 14 away from the rotating member 15 is fixedly connected to a hand wheel 16 ; manually rotating the hand wheel 16 will drive the screw rod 14 to rotate.

[0023] A rear seat 17 is fixedly sleeved on the outer wall of the protective sleeve 12, and the rear seat 17 is fixedly connected to a mold shell 18. A top mold 19 is arranged in the mold shell 18, and a cushion mold 20 is arranged between the rear seat 17, the top mold 19 and the protective sleeve 12, so that the device connection structure is stable.

[0024] The ejector pin 1 and the ejector block 9 are matched with the inner cavity of the ejector mold 19; the ejector pin 1 and the ejector block 9 can slide in the inner cavity of the ejector mold 19 to eject the parts in the ejector mold 19; it should be noted that the ejector pin 1, the slide rod 2 and the ejector block 9 are all made of solid materials.

[0025] Working principle of the utility model: when in use, manually rotating the hand wheel 16 will drive the screw 14 to rotate. Since the inner side of the threaded seat 13 is threadedly connected to the screw 14, the rotation of the screw 14 will drive the ejector pin 1 to move. After the ejector pin 1 moves a certain distance, it will drive the ejector block 9 to move, and then the ejector block 9 and the ejector pin 1 gradually move into the inner cavity of the ejector die 19, so as to eject the parts in the ejector die 19. In the process of ejecting the parts, the spring 6 can play a buffering role; when the parts are produced, one end of the part will contact the ejector block 9. When the part squeezes the ejector block 9, the spring 6 will squeeze it slightly to play a buffering role, thereby reducing the damage to the ejector block 9. Secondly, a buffer is provided between piston 1 4 and piston 2 5, and the buffer can play a buffering role; at the same time, the buffer is used to prevent spring 1 6 and spring 2 7 from being squeezed over a long distance during production, thereby affecting the processing of parts. When spring 1 6 is slightly squeezed, piston 1 4 will move slightly to squeeze the buffer between piston 1 4 and spacer 8 through the through hole on spacer 8 and between spacer 8 and piston 2 5. At this time, piston 2 5 will move slightly, so that spring 2 7 will also be slightly squeezed, and then the squeezed spring 1 6 and spring 2 7 will reset. At this time, due to the effect of the buffer, spring 1 6 and spring 2 7 will slowly reset, reducing the impact on part processing.

[0026] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A protective assembly for ejecting a cold heading die of a slender rod, comprising an ejector pin (1), characterized in that: One end of the slide rod (2) is slidably connected to a slide groove (3) provided on the inner side of the ejector pin (1); a piston 1 (4) and a piston 2 (5) are slidably connected in the slide groove (3); a spring 1 (6) is provided between the piston 1 (4) and the slide rod (2); a spring 2 (7) is provided between the piston 2 (5) and the inner wall of the slide groove (3); a spacer (8) is fixedly connected to the inner wall of the slide groove (3); the spacer (8) is located between the piston 1 (4) and the piston 2 (5) and a through hole is provided on the spacer (8); a buffer is provided between the piston 1 (4) and the piston 2 (5); and one end of the slide rod (2) away from the spring 1 (6) is fixedly connected to the ejector block (9).

2. The protective assembly for ejection of a cold heading die for a slender rod according to claim 1, characterized in that: A limiting block (10) is fixedly connected to the outer wall of the sliding rod (2), and the limiting block (10) is slidably connected to a limiting groove (11) provided in the ejector pin (1).

3. The protective assembly for ejection of a cold heading die for a slender rod according to claim 1, characterized in that: The ejector pin (1) and ejector block (9) are both slidably connected in the inner cavity of the protective sleeve (12).

4. The protective assembly for ejection of a cold heading die for a slender rod according to claim 3, characterized in that: One end of the protective sleeve (12) is fixedly connected to a threaded seat (13), the inner side of the threaded seat (13) is threadedly connected to a screw rod (14), one end of the screw rod (14) is fixedly connected to a rotating member (15), and the rotating member (15) is rotatably connected in the inner cavity of the ejector pin (1).

5. The protective assembly for ejection of a cold heading die for a slender rod according to claim 4, characterized in that: One end of the screw rod (14) away from the rotating member (15) is fixedly connected to a hand wheel (16).

6. The protective assembly for ejection of a cold heading die for a slender rod according to claim 3, characterized in that: A rear seat (17) is fixedly sleeved on the outer wall of the protective sleeve (12); the rear seat (17) is fixedly connected to a mold shell (18); a top mold (19) is arranged inside the mold shell (18); and a cushion mold (20) is arranged between the rear seat (17), the top mold (19) and the protective sleeve (12).

7. The protective assembly for ejection of a cold heading die for a slender rod according to claim 1, characterized in that: The ejector pin (1) and ejector block (9) are both matched with the inner cavity of the ejector mold (19).

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