Hot extrusion die pin capable of being prevented from being popped up after being heated

Abstract

The utility model discloses a hot extrusion die pin capable of avoiding popping up after being heated, which comprises a pin body, the pin body comprises a cylinder, the two ends of the cylinder are inclined towards the axis direction of the cylinder to form an inserting part, and the inserting part is used for guiding the cylinder to be inserted into a pin hole of a die; and the number of the exhaust holes is two, and the two exhaust holes are both transversely distributed in the outer side face of the column body. The pin body can be quickly inserted into the pin hole by arranging the inserting part, so that the matching precision of the pin body and the pin hole is ensured, and the phenomenon that the pin body cannot be normally assembled due to the fact that the pin hole is tightened is avoided; furthermore, two exhaust holes are formed, gas generated by the mold in the pin hole can be output to the outer side of the mold through the exhaust holes, so that the pin body cannot be popped out of the pin hole due to the pressure of the gas, and the mold is guaranteed not to be influenced by a high-temperature environment and can be normally used.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of hot extrusion die pin that avoids being ejected by heat. BACKGROUND

[0002] Hot extrusion die is a kind of die for heating metal to above recrystallization temperature and extrusion forming, generally by upper die (left die) and lower die (right die) Assembly into die whole to use, its work periphery temperature is usually higher, to ensure that molten metal liquid in cavity is shaped into the parts to be processed and produced, and hot extrusion die is assembled, usually pin hole is set on die, and fastener such as pin is used for assembly.

[0003] However, in practical application, due to the limitation of processing technology or wear caused by long-term use, pin hole often appears tight, and burr, surface roughness and other defects may exist inside, so that pin cannot be normally assembled, and assembly precision is low.

[0004] On the other hand, when die works in high temperature environment, gap between pin hole and die can produce gas, and pin has the risk of ejection under the action of gas pressure. Once ejected, die cannot be normally used, affecting the extrusion production of parts.

[0005] Therefore, it is necessary to invent a kind of hot extrusion die pin that avoids being ejected by heat to solve the above problems. CONTENT OF UTILITY MODEL

[0006] (I) purpose of utility model

[0007] To solve the technical problems in the background art, the utility model provides a kind of hot extrusion die pin that avoids being ejected by heat, by being provided with insertion part, so that pin body can be quickly inserted into pin hole inside, ensure the assembly precision of pin body and pin hole, avoid that pin body cannot be normally assembled due to pin hole tightness;Further, by being provided with two exhaust holes, gas generated in pin hole in die can be output to the outside of die through exhaust hole, so that pin body will not be ejected from pin hole inside due to the pressure of gas, ensure that die is not affected by high temperature environment and normally used.

[0008] (II) technical scheme

[0009] In order to achieve the above purpose, the utility model provides the following technical scheme: a kind of hot extrusion die pin that avoids being ejected by heat includes pin body, and the pin body includes:

[0010] Cylinder, the both ends of the cylinder are inclined to the direction of cylinder axis to form insertion part, for guiding cylinder to be inserted into the inside of pin hole of die;

[0011] Two exhaust holes are arranged on the outer side of the column body, and the two exhaust holes are arranged transversely on the outer side of the column body, and are used for exhausting the gas between the pin body and the mold.

[0012] A groove is arranged on the outer side of the column body, and the groove is used for connecting the two exhaust holes.

[0013] Preferably, the length of the two insertion parts is one quarter of the length of the column body.

[0014] Preferably, the two insertion parts are both circular frustums, and the inclination angle of the two insertion parts is 10 degrees.

[0015] Preferably, the two exhaust holes are symmetrically arranged about the axis of the column body, and the two exhaust holes are both linear.

[0016] Preferably, the two ends of the two exhaust holes extend to the outer side of the two insertion parts, and the inclination angle of the exhaust hole on the outer side of the insertion part is matched with the inclination angle of the insertion part.

[0017] Preferably, the groove is arranged on the outer side of the middle of the column body, and the groove is arranged in a ring shape.

[0018] Preferably, the pin body is made of tungsten-molybdenum alloy material.

[0019] Compared with the prior art, the beneficial effects of the above technical scheme of the present application are:

[0020] 1. The insertion part in the form of a circular frustum can guide the column body in the middle, so that the pin body can be quickly inserted into the pin hole, the cooperation precision of the pin body and the pin hole is ensured, the pin body cannot be normally assembled due to the shrinkage of the pin hole, and the connection strength between the pin body and the mold is increased.

[0021] 2. The two exhaust holes are arranged, the gas generated in the pin hole due to the expansion and shrinkage of the mold in a high-temperature environment can be output to the outside of the mold through the exhaust holes, the gas is prevented from remaining or gathering in the pin hole, the pin body cannot be ejected from the pin hole due to the pressure of the gas, the use of the pin body is safer, the mold is prevented from being affected by the high-temperature environment and is normally used, and the production efficiency of the parts is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to these drawings.

[0023] Fig. 1 It is the whole structure schematic view of the utility model;

[0024] Fig. 2 It is the front view of the utility model;

[0025] Fig. 3 It is the left view of the utility model.

[0026] Mark explanation:

[0027] 1 pin body, 2 cylinder, 3 plug-in part, 4 exhaust hole, 5 channel. Specific implementation

[0028] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be further introduced in detail below with the drawings.

[0029] The utility model provides a kind of hot extrusion die pin that avoids being popped out by heat as shown in Figs. 1-3 Pin body 1, the pin body 1 includes cylinder 2, the cylinder 2 both ends are inclined to the axis direction of cylinder 2 Form plug-in part 3, for guiding cylinder 2 is inserted into the inside of pin hole of die;

[0030] Exhaust hole 4, the number of exhaust hole 4 is provided with two, and two exhaust holes 4 are laterally distributed on the outer side of cylinder 2, for discharging gas between pin body 1 and die;

[0031] Channel 5, is opened in the outer side of cylinder 2, for communicating two exhaust holes 4.

[0032] In an embodiment, the length of two plug-in parts 3 is set to one fourth of the length of cylinder 2, to ensure that the strength of pin body 1 itself is sufficient, two plug-in parts 3 are set as circular truncated cone as a whole, and the inclination angle of two plug-in parts 3 is set to 10 degrees, to facilitate the quick insertion of pin body 1 into pin hole.

[0033] In an embodiment, two exhaust holes 4 are symmetrically distributed about the axis of cylinder 2, and two exhaust holes 4 are in the form of a Chinese character, and two ends of two exhaust holes 4 extend to the outer side of two plug-in parts 3 respectively, and the inclination angle of exhaust hole 4 on the outer side of plug-in part 3 is matched with plug-in part 3, so that the gas in the inside of pin hole can be discharged, and cannot be gathered in pin hole, to avoid that pin body 1 is popped out by gas pressure.

[0034] In one embodiment, the channel 5 is arranged on the middle outer side of the column 2, and the channel 5 is arranged in a ring shape, so that the gas inside the two exhaust holes 4 can be combined, and then discharged to the outside of the mold through the inside of the exhaust hole 4 faster, and the design of the channel 5 makes the gas between the pin body 1 and the pin hole can quickly enter the inside of the exhaust hole 4, and then be discharged, ensuring the safe use of the pin body 1.

[0035] In one embodiment, the pin body 1 is made of tungsten molybdenum alloy material, so that the pin body 1 can maintain good performance and stability in high temperature environment.

[0036] The embodiment is specific: when the mold is assembled with the mold, tools such as square ruler, level, height gauge and the like can be used to ensure the accuracy of perpendicularity and tightness;

[0037] Specifically, when installing the pin body 1, a proper amount of lubricant or rust inhibitor is applied inside the pin hole to reduce the friction between the pin and the pin hole, then the pin body 1 is aligned with the pin hole on the mold, the tool is used to apply force smoothly, and the end of the pin body 1 is knocked to make the pin body 1 keep perpendicularity while being embedded in the pin hole, so that the installation of the pin body 1 is completed;

[0038] During the above installation process, the two ends of the pin body 1 are provided with the plug-in part 3 in the shape of a circular truncated cone, which can guide the column 2 located in the middle, so that the pin body 1 can be quickly inserted into the pin hole, not only convenient to install, but also ensure the cooperation precision of the pin body 1 and the pin hole, avoid the pin body 1 cannot be normally assembled due to the tightness of the pin hole, greatly increase the connection strength between the pin body 1 and the mold, and the plug-in part 3 located on the outside after installation is convenient for disassembly of the mold, and the mold is quickly separated from the pin body 1;

[0039] At the same time, after installation, the pin body 1 is used, because the side is provided with two exhaust holes 4, the gas generated in the pin hole due to expansion and contraction of the mold in high temperature environment will be guided by the exhaust hole 4 and output to the outside of the mold through the exhaust hole 4, so as to ensure that the gas generated when the mold is heated can be discharged in time, avoid the gas remaining or gathering in the pin hole, so that the pin body 1 will not be ejected from the pin hole due to the pressure of the gas, the use of the pin body 1 is more safe, so as to ensure that the mold is not affected by the high temperature environment and is used normally, and the production efficiency of the parts is improved;

[0040] The embodiment specifically solves the problems in the prior art that due to the limitation of the processing technology or long-term use, the pin hole often appears tight, burrs may exist inside, the surface is not smooth and the like, so that the pin cannot be normally assembled and the assembly precision is low, and when the mold works in a high-temperature environment, gas is generated between the pin hole and the mold, the pin has the risk of being ejected under the action of the gas pressure, once ejected, the mold cannot be normally used, and the extrusion production of parts is affected.

[0041] The above describes certain exemplary embodiments of the present application only by way of illustration, without doubt, for those skilled in the art, without departing from the spirit and scope of the present application, the described embodiments can be modified in various ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A hot extrusion die pin designed to prevent ejection due to heat, characterized in that: Includes a pin body (1), said pin body (1) comprising: The column (2) has two ends that are inclined toward the axis of the column (2) to form a plug-in part (3), which is used to guide the column (2) to be inserted into the pin hole of the mold; Vent holes (4) are provided in two, and both vent holes (4) are laterally distributed on the outer side of the column (2) to discharge the gas between the pin body (1) and the mold; The channel (5) is opened on the outer side of the column (2) and is used to connect the two exhaust holes (4).

2. The hot extrusion die pin for preventing ejection due to heat as described in claim 1, characterized in that: The length of both of the plugs (3) is set to one-quarter of the length of the column (2).

3. The hot extrusion die pin for preventing ejection due to heat as described in claim 1, characterized in that: Both of the plug-in parts (3) are configured as frustums, and the tilt angle of both plug-in parts (3) is set to 10 degrees.

4. The hot extrusion die pin for preventing ejection due to heat as described in claim 1, characterized in that: The two exhaust holes (4) are symmetrically distributed about the axis of the column (2), and both exhaust holes (4) are in a straight line.

5. A hot extrusion die pin to prevent ejection due to heat, as described in claim 4, characterized in that: The two ends of the two exhaust holes (4) extend to the outer surfaces of the two plug-in portions (3), and the inclination angle of the exhaust holes (4) located on the outer surfaces of the plug-in portions (3) is adapted to the plug-in portions (3).

6. A hot extrusion die pin to prevent ejection due to heat, as described in claim 1, characterized in that: The channel (5) is disposed on the outer side of the middle part of the column (2), and the channel (5) is configured as an annular shape.

7. A hot extrusion die pin to prevent ejection due to heat, as described in claim 1, characterized in that: The pin body (1) is made of tungsten-molybdenum alloy material.

Images