High-brightness die hole extrusion structure for special-shaped brake oil pipe joint

Abstract

The utility model relates to a high-brightness die hole extrusion structure for a special-shaped brake oil pipe joint, and belongs to the field of brake oil pipe joint machining. The device comprises a movable mold shell with a first cushion block at the bottom; the movable mold core is slidably connected to the inner wall of the movable mold shell and is provided with a mold cavity; a spring; the movable die core is fixed between the movable die core and the first cushion block; the upper punching sleeve is propped against the surface of the movable mold core; the lower punching rod is fixedly connected with the first cushion block and comprises a punching working belt, a burnishing working belt and a rear stealing part, and the burnishing working belt is located between the punching working belt and the rear stealing part; the outer wall of the lower punching rod is sleeved with the supporting pipe, the supporting pipe is located in the die cavity, and a gasket is arranged at the bottom and attached to the first cushion block; the ejector pin penetrates through the first cushion block and is in sliding connection with the first cushion block, and the upper end face of the ejector pin is attached to the gasket. According to the structure, the same inner hole is subjected to secondary burnishing at one station, so that a relatively bright inner hole is conveniently obtained, and the manufacturing cost of the special-shaped brake oil pipe joint is reduced.

Description

Technical Field

[0001] The utility model relates to the field of brake oil pipe joint processing, in particular to a high-brightness die extrusion hole structure of a special-shaped brake oil pipe joint. Background Art

[0002] After the cold forging through-hole of the special-shaped brake oil pipe joint is cold-forged to remove the waste material, there are obvious punching marks on the side wall of the inner hole of the special-shaped brake oil pipe joint, and the surface is relatively rough. This process is difficult to meet the requirements for the smoothness of the inner hole. In order to ensure that the inner hole of the product is relatively smooth and there are no tearing marks from punching waste, the traditional processing technology usually adds a processing process of reaming the large hole at the end, which increases the manufacturing cost of the product. Therefore, it needs to be improved. Utility Model Content

[0003] Based on this, it is necessary to provide a high-brightness mold extrusion hole structure for special-shaped brake oil pipe joints, which has obvious punching marks on the side wall of the inner hole of the special-shaped brake oil pipe joints after the cold forging through-hole is removed and the surface is relatively rough. Traditional processing technology usually adds a processing sequence of reaming the large hole at the end, thereby increasing the manufacturing cost of the product.

[0004] The utility model provides a high-brightness die extrusion hole structure for a special-shaped brake oil pipe joint, comprising:

[0005] The movable formwork has a first pad at the bottom;

[0006] A movable mold core is slidably connected to the inner wall of the movable mold shell and has a mold cavity;

[0007] Spring; fixed between the movable mold core and the first pad;

[0008] An upper punch sleeve rests against the surface of the movable mold core;

[0009] A lower punch is fixedly connected to the first spacer and includes a punching working zone, an extrusion working zone and a rear stealing portion, wherein the extrusion working zone is located between the punching working zone and the rear stealing portion;

[0010] A support tube is sleeved on the outer wall of the lower punch and is located in the mold cavity, and has a gasket at the bottom, and the gasket is in contact with the first cushion block;

[0011] The ejector pin passes through the first cushion block and is slidably connected to the first cushion block, and the upper end surface of the ejector pin is in contact with the gasket.

[0012] In one embodiment, the outer diameter of the punching working belt is the same as the outer diameter of the rear stealing portion, and the outer diameter of the extrusion working belt is larger than the outer diameter of the rear stealing portion.

[0013] In one embodiment, a buffer zone is provided between the punching working zone and the extrusion working zone, and the outer diameter of the buffer zone is smaller than the outer diameter of the punching working zone.

[0014] In one embodiment, a spring steel sleeve is fixedly connected to the surface of the first cushion block, the spring steel sleeve is located between the movable mold shell and the spring, and a limiting cavity is formed between the spring steel sleeve and the movable mold core.

[0015] In one embodiment, the bottom of the first pad is fixedly connected to the second pad, the ejector pin passes through the second pad, the first pad and the second pad are both slidably connected to the ejector pin, a fixing hole is opened on the surface of the first pad, the lower punch is fixed in the fixing hole, and a pad rod is fixedly connected between the lower punch and the second pad.

[0016] In one embodiment, the bottoms of the movable mold shell, the first cushion block, and the second cushion block are all provided with mounting holes, and bolts are threadedly connected in the mounting holes.

[0017] In one embodiment, the bottom of the upper punch sleeve has a raised portion, the outer diameter of the raised portion is smaller than the outer diameter of the upper punch sleeve, and the raised portion is located in the mold cavity.

[0018] In one embodiment, a waste channel is provided on the upper punch sleeve.

[0019] The high-brightness die extrusion hole structure of the above-mentioned special-shaped brake oil pipe joint, during use, when the extrusion working belt passes through the entire special-shaped brake oil pipe joint for the first time, the upper punch sleeve further presses the movable mold core downward, so that the upper end face of the special-shaped brake oil pipe joint and the front end face of the upper punch sleeve are squeezed, and the lower end of the special-shaped brake oil pipe joint and the front end face of the support tube are squeezed, thereby forcing the inner hole of the special-shaped brake oil pipe joint to shrink and fit tightly against the rear stealth part of the lower punch rod; when the extrusion of the special-shaped brake oil pipe joint is completed, the ejector pin is moved, and the ejector pin drives the gasket to move, so that the support tube pushes the special-shaped brake oil pipe joint out, and at this time the extrusion working belt of the lower punch rod again laser expands the inner hole of the special-shaped brake oil pipe joint, and then performs secondary extrusion on the same inner hole at one station, so as to obtain a brighter inner hole, so that the inner hole of the special-shaped brake oil pipe joint does not need to be subsequently machined and reamed after cold heading, thereby reducing the manufacturing cost of the special-shaped brake oil pipe joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A three-dimensional schematic diagram of a die extrusion hole structure of a special-shaped brake oil pipe joint with high brightness in one embodiment;

[0022] Figure 2 A schematic cross-sectional view of a high-brightness die extrusion hole structure for a special-shaped brake oil pipe joint in one embodiment;

[0023] Figure 3 Schematic diagram of the lower punch structure in one embodiment;

[0024] Figure 4 Schematic diagram of the upper punch sleeve structure in one embodiment.

[0025] Reference numerals:

[0026] 100. Movable mold shell; 110. First gasket; 120. Second gasket; 130. Fixing hole; 140. Mounting hole; 150. Bolt; 200. Movable mold core; 210. Mold cavity; 300. Spring; 310. Spring steel sleeve; 320. Limiting cavity; 400. Upper punch sleeve; 410. Raised portion; 420. Waste channel; 500. Lower punch; 510. Punching working zone; 520. Extrusion working zone; 530. Back stealing portion; 540. Buffer zone; 550. Pad rod; 600. Support tube; 610. Gasket; 700. Ejector pin. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this utility model are for illustrative purposes only and do not represent the only implementation method.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this utility model have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in the specification of this utility model includes any and all combinations of one or more of the relevant listed items.

[0032] The following combination Figure 1-Figure 4 The utility model describes a high-brightness die extrusion hole structure of a special-shaped brake oil pipe joint.

[0033] like Figure 1 、 Figure 2 and Figure 3 As shown, in one embodiment, a high-brightness die extrusion hole structure for a special-shaped brake oil pipe joint includes a movable mold shell 100, a movable mold core 200, a spring 300, an upper punch sleeve 400, a lower punch rod 500, a support tube 600 and an ejector pin 700.

[0034] The bottom of the movable formwork 100 has a first cushion block 110 .

[0035] The movable mold core 200 is slidably connected to the inner wall of the movable mold shell 100 , and the movable mold core 200 has a mold cavity 210 .

[0036] By adopting the movable mold core 200, it is convenient to ensure that the special-shaped brake oil pipe joint and the mold cavity 210 remain relatively static during the through-hole process, which is beneficial to reduce the friction resistance between the outer surface of the special-shaped brake oil pipe joint and the inner wall of the movable mold core 200.

[0037] The spring 300 is fixed between the movable mold core 200 and the first cushion block 110 .

[0038] It should be additionally explained that the spring 300 is a rectangular spring.

[0039] The upper punch sleeve 400 abuts against the surface of the movable mold core 200 .

[0040] This facilitates the relative displacement of the special-shaped brake oil pipe joint and the lower punch 500 during the downward movement of the movable mold core 200 compressing the spring 300, thereby separating the waste material on the inner wall of the special-shaped brake oil pipe joint from the special-shaped brake oil pipe joint.

[0041] The lower punch 500 is fixedly connected to the first cushion block 110 , and includes a punching working zone 510 , an extrusion working zone 520 and a rear stealing portion 530 , wherein the extrusion working zone 520 is located between the punching working zone 510 and the rear stealing portion 530 .

[0042] It should be noted that the punching work zone 510 is mainly used to separate the waste from the inner wall of the special-shaped brake oil pipe joint, the extrusion work zone 520 is mainly used to extrude the inner hole of the special-shaped brake oil pipe joint, and the rear stealing part 530 is used to ensure that there is back pressure space in the inner hole of the special-shaped brake oil pipe joint, and at the same time to ensure that the secondary extrusion has a suitable extrusion margin.

[0043] The support tube 600 is sleeved on the outer wall of the lower punch 500 , and the support tube 600 is located in the mold cavity 210 . A gasket 610 is provided at the bottom of the support tube 600 , and the gasket 610 is in contact with the first cushion block 110 .

[0044] The ejector pin 700 passes through the first cushion block 110 , and the ejector pin 700 is slidably connected to the first cushion block 110 , and the upper end surface of the ejector pin 700 is in contact with the gasket 610 .

[0045] During the use of the high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint, when the extrusion working belt 520 passes through the entire special-shaped brake oil pipe joint for the first time, the upper punch sleeve 400 further presses the movable mold core 200 downward, so that the upper end face of the special-shaped brake oil pipe joint and the front end face of the upper punch sleeve 400 are squeezed by force, and the lower end of the special-shaped brake oil pipe joint and the front end face of the support tube 600 are squeezed by force, thereby forcing the inner hole of the special-shaped brake oil pipe joint to shrink and fit tightly against the rear stealing part 530 of the lower punch rod 500; when the special-shaped brake oil pipe joint is After the head extrusion is completed, the ejector pin 700 is moved, and the ejector pin 700 drives the gasket 610 to move, so that the support tube 600 pushes out the special-shaped brake oil pipe joint. At this time, the extrusion working belt 520 of the lower punch 500 again laser expands the inner hole of the special-shaped brake oil pipe joint, and then performs secondary extrusion on the same inner hole at a work station, so as to obtain a brighter inner hole, so that the inner hole of the special-shaped brake oil pipe joint does not need to be subsequently machined and reamed after cold heading, thereby reducing the manufacturing cost of the special-shaped brake oil pipe joint.

[0046] In this embodiment, the outer diameter of the punching working belt 510 is the same as the outer diameter of the rear stealing portion 530 , and the outer diameter of the extrusion working belt 520 is larger than the outer diameter of the rear stealing portion 530 .

[0047] It should be noted that the outer diameter of the punching working zone 510 is 0.05mm smaller than the inner hole requirement of the special-shaped brake oil pipe joint, and the outer diameter of the extrusion working zone 520 is the inner hole diameter requirement of the special-shaped brake oil pipe joint. The rear stealing part 530 is mainly to ensure that after the first extrusion of the special-shaped brake oil pipe joint, the inner hole of the special-shaped brake oil pipe joint shrinks after the upper and lower end faces are pressurized, and it is close to the outer wall of the rear stealing part 530, and then a second reverse extrusion is performed when the support tube 600 pushes out the special-shaped brake oil pipe joint.

[0048] In this embodiment, a buffer zone 540 is provided between the punching working zone 510 and the burnishing working zone 520 . The outer diameter of the buffer zone 540 is smaller than the outer diameter of the punching working zone 510 .

[0049] The buffer belt 540 plays a buffering role and facilitates the removal of waste materials generated during the extrusion process from the mold cavity 210.

[0050] In this embodiment, a spring steel sleeve 310 is fixedly connected to the surface of the first cushion block 110 . The spring steel sleeve 310 is located between the movable mold shell 100 and the spring 300 . A limiting cavity 320 is formed between the spring steel sleeve 310 and the movable mold core 200 .

[0051] Through the design of the spring steel sleeve 310, on the one hand, it is convenient to limit the spring 300 to be compressed and restored only in the axial direction of the lower punch rod 500, which can effectively prevent the spring 300 from being displaced during use, thereby facilitating force transmission and improving the processing quality of the special-shaped brake oil pipe joint.

[0052] In this embodiment, the bottom of the first cushion block 110 is fixedly connected to the second cushion block 120, the ejector pin 700 passes through the second cushion block 120, the first cushion block 110 and the second cushion block 120 are both slidably connected to the ejector pin 700, a fixing hole 130 is opened on the surface of the first cushion block 110, the lower punch 500 is fixed in the fixing hole 130, and a cushion rod 550 is fixedly connected between the lower punch 500 and the second cushion block 120.

[0053] By adding the second cushion block 120 to the bottom of the first cushion block 110 and adding the cushion rod 550 to the bottom of the lower punch 500, the service life of the mold is conveniently increased.

[0054] In this embodiment, the bottoms of the movable mold shell 100, the first cushion block 110 and the second cushion block 120 are all provided with mounting holes 140, and bolts 150 are threadedly connected to the mounting holes 140. By fixing the bolts 150 in the corresponding mounting holes 140, the assembly and disassembly of the mold are facilitated.

[0055] In this embodiment, the bottom of the upper punch sleeve 400 has a protrusion 410 . The outer diameter of the protrusion 410 is smaller than the outer diameter of the upper punch sleeve 400 . The protrusion 410 is located in the mold cavity 210 .

[0056] This makes it convenient for the lower end of the upper punch sleeve 400 to rest against the upper surface of the movable mold core 200, and the lower end of the protrusion 410 contacts the end face of the special-shaped brake oil pipe joint, thereby forcing the movable mold core 200 to compress the spring 300 to move downward, and the special-shaped brake oil pipe joint and the lower punch rod 500 to produce relative displacement, so that the waste on the inner wall of the special-shaped brake oil pipe joint is separated from the special-shaped brake oil pipe joint.

[0057] In this embodiment, see Figure 4 A waste channel 420 is provided on the upper punch sleeve 400 to facilitate the discharge of waste generated during the processing of the special-shaped brake oil pipe joint from the waste channel 420, thereby preventing the waste from being retained in the mold cavity 210 and affecting the processing quality.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and improvements are possible within the scope of the present invention, as would be apparent to one skilled in the art. These variations and improvements fall within the scope of the present invention. Therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. A high-brightness die extrusion hole structure for a special-shaped brake oil pipe joint, characterized in that: include: The movable formwork has a first pad at the bottom; A movable mold core is slidably connected to the inner wall of the movable mold shell and has a mold cavity; spring; Fixed between the movable mold core and the first cushion block; An upper punch sleeve rests against the surface of the movable mold core; A lower punch is fixedly connected to the first spacer and includes a punching working zone, an extrusion working zone and a rear stealing portion, wherein the extrusion working zone is located between the punching working zone and the rear stealing portion; A support tube is sleeved on the outer wall of the lower punch and is located in the mold cavity, and has a gasket at the bottom, and the gasket is in contact with the first cushion block; The ejector pin passes through the first cushion block and is slidably connected to the first cushion block, and the upper end surface of the ejector pin is in contact with the gasket.

2. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to claim 1 is characterized in that: The outer diameter of the punching working belt is the same as the outer diameter of the rear stealing part, and the outer diameter of the extrusion working belt is larger than the outer diameter of the rear stealing part.

3. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to claim 2 is characterized in that: A buffer zone is provided between the punching working zone and the extrusion working zone, and the outer diameter of the buffer zone is smaller than the outer diameter of the punching working zone.

4. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to claim 3 is characterized in that: A spring steel sleeve is fixedly connected to the surface of the first cushion block. The spring steel sleeve is located between the movable mold shell and the spring. A limiting cavity is formed between the spring steel sleeve and the movable mold core.

5. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to claim 4 is characterized in that: The bottom of the first pad is fixedly connected to the second pad, the ejector pin passes through the second pad, the first pad and the second pad are both slidably connected to the ejector pin, a fixing hole is opened on the surface of the first pad, the lower punch is fixed in the fixing hole, and a pad rod is fixedly connected between the lower punch and the second pad.

6. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to claim 5, characterized in that: The bottoms of the movable mold shell, the first cushion block and the second cushion block are all provided with mounting holes, and bolts are threadedly connected in the mounting holes.

7. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to any one of claims 1 to 6, characterized in that: The bottom of the upper punch sleeve is provided with a raised portion, the outer diameter of the raised portion is smaller than the outer diameter of the upper punch sleeve, and the raised portion is located in the mold cavity.

8. The high-brightness die extrusion hole structure of the special-shaped brake oil pipe joint according to claim 7, characterized in that: A waste channel is provided on the upper punch sleeve.

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