Preheating device of shifting fork metal mold

Abstract

A preheating device of a shifting fork metal mold belongs to the technical field of metal mold preheating and comprises a combustion main pipe, the combustion main pipe is of a rectangular structure, a first combustion branch pipe and a second combustion branch pipe are fixedly connected to the combustion main pipe, and combustion nozzle sets are arranged on the first combustion branch pipe and the second combustion branch pipe. The two sides of the combustion main pipe are fixedly connected with a fuel connecting pipe and a third combustion branch pipe correspondingly, and the third combustion branch pipe is located on the side, close to a mold pouring basin, of the combustion main pipe and used for preheating the pouring basin. Compared with the prior art, the gear shifting fork metal mold of a complex structure can be rapidly and evenly preheated in a targeted mode, the service life of the metal mold is prolonged, the preheating time is shortened, the energy utilization rate is increased, meanwhile, the pouring basin is preheated synchronously, the production efficiency can be improved, and the casting quality is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal mold preheating technical field, especially a kind of preheating device of gear shift fork metal mold. BACKGROUND

[0002] Metal mold is the indispensable important component of foundry industry production, due to the good thermal conductivity of metal mold, liquid metal cools fast, and flowability is sharply reduced, and it is easy to cause casting to appear cold separation, underfill, blowhole and other defects, cold mold is directly contacted with scorching liquid metal, and it is inevitably subjected to thermal shock, to generate thermal erosion, accelerate mold thermal fatigue and cause mold crack and spalling, therefore, in casting production, metal mold preheating is generally carried out.

[0003] The existing metal mold heating commonly uses electric heating tube heating, burning kerosene heating, gas heating and other various ways, but there are problems of uneven mold preheating, long preheating cycle, in order to realize the fast and uniform preheating of metal mold, metal mold preheating flame gun device (publication number CN213395296U) has appeared currently, combustion pipe is arranged into annular, and a plurality of combustion holes are arranged on the combustion pipe, the hole positions of combustion hole are staggered, and the uniform heating of metal mold is realized by multi-point and multi-directional flame spraying mode.

[0004] The existing metal mold preheating flame gun device can only be used for uniform rectangular mold of cavity, and the existing metal mold structure is diversified, and the size is not the same, especially gear shift fork mold, its structure is more complex, the existing metal mold flame gun is small in application range, and cannot meet the production requirements of fast and uniform preheating of gear shift fork mold. UTILITY MODEL CONTENTS

[0005] To solve the technical problems that the existing metal mold preheating flame gun device is small in application range and cannot meet the production requirements of fast and uniform preheating of gear shift fork mold in the above background art, the utility model provides a kind of preheating device of gear shift fork metal mold.

[0006] The utility model technical scheme is as follows:

[0007] The utility model provides a kind of preheating device of gear shift fork metal mold, including combustion main pipe, combustion main pipe is rectangular structure, first combustion branch pipe and second combustion branch pipe are fixedly connected on combustion main pipe, first combustion branch pipe and second combustion branch pipe are equipped with combustion nozzle group on, to be used to preheat the fork part, fork shaft part of mold cavity respectively, the both sides of combustion main pipe are fixedly connected with fuel connecting pipe and third combustion branch pipe, third combustion branch pipe is located in the side of combustion main pipe close to mold pouring basin, third combustion branch pipe is used to preheat pouring basin, the setting of first combustion branch pipe, second combustion branch pipe, third combustion branch pipe, it can be targeted to the complex structure gear shift fork metal mold fast and evenly preheats, temperature is more uniform in heating process, reduces thermal stress, prolongs the service life of metal mold, and shorten preheating time, improve energy utilization ratio, simultaneously, preheat pouring basin synchronously, can improve the flowability of metal liquid, reduce shrinkage cavity defect, to greatly improve production efficiency, guarantee casting quality.

[0008] Preferably, the first combustion branch pipe and the second combustion branch pipe are fixedly arranged in the rectangular space enclosed by the combustion main pipe, so as to send fuel to the designated combustion position.

[0009] Preferably, the first combustion branch pipe and the second combustion branch pipe extend along the length direction of the combustion main pipe, the first combustion branch pipe and the second combustion branch pipe are arranged in the width direction of the combustion main pipe, and each of the first combustion branch pipe and the second combustion branch pipe is provided with a group of first combustion nozzles or a group of second combustion nozzles near the two sides of the mold, so as to realize multi-point bidirectional flame spraying.

[0010] Preferably, the first combustion nozzle group comprises a plurality of first combustion nozzles arranged in the length direction of the first combustion branch pipe, and the second combustion nozzle group comprises a plurality of second combustion nozzles arranged in the length direction of the second combustion branch pipe, so as to realize multi-point bidirectional flame spraying.

[0011] Preferably, the first combustion nozzle corresponds to the fork shaft part of the mold cavity one by one, so as to preheat the fork shaft part of the mold cavity correspondingly.

[0012] Preferably, the second combustion nozzle corresponds to the fork part of the mold cavity one by one, so as to preheat the fork part of the mold cavity correspondingly.

[0013] Preferably, the third combustion branch pipe is provided with a plurality of third combustion branch pipes arranged in the length direction of the combustion main pipe, and the third combustion branch pipe corresponds to the pouring basin one by one, so as to realize synchronous fast and uniform preheating of all pouring basins.

[0014] Preferably, the third combustion branch pipe is inclined towards the direction close to the sprue basin, facilitating targeted preheating of the sprue basin while avoiding the molten metal.

[0015] Preferably, the end of the fuel connecting pipe is provided with a joint and a valve for connecting the combustion main pipe with a fuel source and having the ability to control the combustion intensity.

[0016] Preferably, the combustion main pipe is fixedly provided with a supporting leg on the side close to the lower mold, so as to ensure the spacing between the combustion main pipe and the lower mold and the upper mold, thereby ensuring the effectiveness and uniformity of preheating.

[0017] Through the above technical solutions, the preheating device for the shift fork metal mold has the following advantages:

[0018] 1. The first combustion branch pipe, the second combustion branch pipe and the third combustion branch pipe can be used to quickly and uniformly preheat the shift fork metal mold with a complex structure, the temperature of the metal mold is more uniform during the heating process, the thermal stress is reduced, the service life of the metal mold is prolonged, the preheating time is shortened, the energy utilization rate is improved, the sprue basin is preheated synchronously, the flowability of the molten metal is improved, the shrinkage defects are reduced, and thus the production efficiency is greatly improved and the casting quality is ensured.

[0019] 2. The first combustion branch pipe is provided with a group of first combustion nozzles on the two sides close to the mold, the second combustion branch pipe is provided with a group of second combustion nozzles on the two sides close to the mold, and the first combustion nozzle group and the second combustion nozzle group are both provided with a plurality of combustion nozzles arranged at intervals, so as to realize targeted multi-point bidirectional flame spraying and meet the demand for uniformly and quickly preheating the special-shaped cavity in the metal mold. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 It is a front view structural schematic diagram of the preheating device for the shift fork metal mold according to one or more embodiments of the present application in use.

[0022] Figure 2 It is a side view structural schematic diagram of the preheating device for the shift fork metal mold according to one or more embodiments of the present application in use.

[0023] Figure 3 It is a front view structural schematic diagram of the preheating device for the shift fork metal mold according to one or more embodiments of the present application.

[0024] Figure 4 Figure 1 is a side view of a preheating device for a shift fork metal mold according to one or more embodiments of the present application;

[0025] The components represented by the reference numerals in the drawings are:

[0026] 1, pouring basin; 2, lower mold; 3, cavity; 4, main combustion pipe; 5, first combustion branch pipe; 6, fuel connecting pipe; 7, leg; 8, upper mold; 9, second combustion branch pipe; 10, third combustion branch pipe; 11, first combustion nozzle; 12, second combustion nozzle. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the present application will be described clearly and completely below in combination with the drawings in the specific embodiments. Obviously, the following described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present patent, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present patent.

[0028] In a typical embodiment of the present application, as shown in Figures 1-4 A preheating device for a shift fork metal mold is provided, which comprises a main combustion pipe 4, a first combustion branch pipe 5, a second combustion branch pipe 9 and a third combustion branch pipe 10. The main combustion pipe 4 has a rectangular structure. The main combustion pipe 4 is fixedly connected with a fuel connecting pipe 6 on one side. The end of the fuel connecting pipe 6 is provided with a joint. The inside of the fuel connecting pipe 6 is in communication with the inside of the main combustion pipe 4. The fuel connecting pipe 6 is used to be connected with gas sources (gas source and air source), so as to deliver mixed gas of gas and air into the main combustion pipe 4. A valve for adjusting flow is arranged on the fuel connecting pipe 6. The fuel connecting pipe 6 and the third combustion branch pipe 10 are oppositely arranged on both sides of the main combustion pipe 4.

[0029] It can be understood that in specific applications, the fuel connecting pipe 6 can be connected with each gas source through a gas mixing device, so that each gas source is premixed in the gas mixing device, and the mixed use of different gas sources can be facilitated.

[0030] The first combustion branch pipe 5 and the second combustion branch pipe 9 are respectively provided with one, and the first combustion branch pipe 5 and the second combustion branch pipe 9 are fixedly arranged in the rectangular space enclosed by the combustion main pipe 4, the first combustion branch pipe 5 and the second combustion branch pipe 9 are communicated with the inside of the combustion main pipe 4, and the first combustion branch pipe 5 and the second combustion branch pipe 9 are respectively provided with a combustion nozzle group for preheating the shift fork part and the shift fork shaft part of the shift fork metal mold cavity 3.

[0031] Specifically, the first combustion branch pipe 5 and the second combustion branch pipe 9 extend along the length direction of the combustion main pipe 4, and the first combustion branch pipe 5 and the second combustion branch pipe 9 are arranged along the width direction of the combustion main pipe 4, the first combustion branch pipe 5 is provided with two groups of first combustion nozzle groups, and the two groups of first combustion nozzle groups are oppositely arranged on the two sides of the first combustion branch pipe 5 close to the lower mold 2 and the upper mold 8, and the second combustion branch pipe 9 is provided with two groups of second combustion nozzle groups, and the two groups of second combustion nozzle groups are oppositely arranged on the two sides of the second combustion branch pipe 9 close to the lower mold 2 and the upper mold 8.

[0032] The combustion main pipe 4, the first combustion branch pipe 5, the second combustion branch pipe 9 and the third combustion branch pipe 10 are all stainless steel heat-resistant round pipes.

[0033] As shown in Figure 3 , Figure 4 , the first combustion nozzle group includes a plurality of first combustion nozzles 11, and the second combustion nozzle group includes a plurality of second combustion nozzles 12, the plurality of first combustion nozzles 11 are arranged along the length direction of the first combustion branch pipe 5, and the plurality of second combustion nozzles 12 are arranged along the length direction of the second combustion branch pipe 9.

[0034] As shown in Figure 1 , the interval between the two adjacent first combustion nozzles 11 is the same as the interval between the adjacent shift fork shaft parts in the mold, that is, the first combustion nozzle 11 corresponds to the shift fork shaft part of the cavity 3 one by one, so as to preheat the corresponding shift fork shaft part of the cavity 3; the interval between the two adjacent second combustion nozzles 12 is the same as the interval between the adjacent shift fork parts in the mold, that is, the second combustion nozzle 12 corresponds to the shift fork part one by one, so as to preheat the corresponding shift fork part of the cavity 3.

[0035] Through the arrangement of the first combustion nozzle 11 and the second combustion nozzle 12, the preheating of different parts of the special-shaped cavity 3 in the shift fork metal mold is realized, and the first combustion nozzle 11 and the second combustion nozzle 12 are distributed on the two sides of the corresponding combustion branch pipe, so as to realize the targeted multi-point bidirectional fire, and meet the demand of uniform and rapid preheating of the entire metal mold special-shaped cavity 3.

[0036] As Figure 2 , Figure 4 shown, the third combustion branch pipe 10 is provided with several, several third combustion branch pipes 10 are arranged along the length direction of the combustion main pipe 4, the third combustion branch pipe 10 is inclined towards the direction close to the nozzle basin 1, the number of the third combustion branch pipe 10 is the same as the number of the nozzle basin 1 and one-to-one correspondence, that is, the interval between two adjacent third combustion branch pipes 10 is the same as the interval between two adjacent nozzle basins 1, so as to realize the synchronous rapid and uniform preheating of all nozzle basins 1.

[0037] The combustion holes on the third combustion branch pipe 10 can be provided at the end thereof, or can be uniformly provided on the pipe body thereof along the ring direction, and the specific arrangement mode can be determined according to actual design requirements, which is not limited too much here.

[0038] As Figure 1 and Figure 2 shown, the combustion main pipe 4 is fixedly provided with a support leg 7 on the side close to the lower mold 2, the support leg 7 is arranged at the four corners of the combustion main pipe 4, so as to support and limit the combustion main pipe 4 through the support leg 7, ensure the interval between the combustion main pipe 4 and the lower mold 2 and the upper mold 8, and further ensure the effectiveness and uniformity of preheating.

[0039] The arrangement of the first combustion branch pipe 5, the second combustion branch pipe 9, the third combustion branch pipe 10 and the first combustion nozzle 11 and the second combustion nozzle 12 realizes the targeted multi-point bidirectional flame spraying, can realize the targeted rapid and uniform preheating of the shift fork metal mold with complex structure, the temperature of the metal mold is more uniform during the heating process, the thermal stress is reduced, the service life of the metal mold is prolonged, the preheating time is shortened, the energy utilization rate is improved, and the nozzle basin can be preheated synchronously to improve the flowability of the metal liquid and reduce the shrinkage defect, thereby greatly improving the production efficiency and ensuring the casting quality.

[0040] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application should not be limited to the embodiments shown herein, but should be consistent with the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A preheating device for shift fork metal die, comprising: The combustion main pipe (4) is characterized in that the combustion main pipe (4) is of a rectangular structure, the first combustion branch pipe (5) and the second combustion branch pipe (9) are fixedly connected to the combustion main pipe (4), the first combustion branch pipe (5) and the second combustion branch pipe (9) are each provided with a combustion nozzle group for preheating the fork part and the fork shaft part of the mold cavity (3), respectively, the fuel connecting pipe (6) and the third combustion branch pipe (10) are fixedly connected to the two sides of the combustion main pipe (4), the third combustion branch pipe (10) is located on the side of the combustion main pipe (4) close to the mold sprue basin (1), and the third combustion branch pipe (10) is used for preheating the mold sprue basin (1).

2. The preheating device of a shift fork metal mold according to claim 1, characterized by The first combustion branch pipe (5) and the second combustion branch pipe (9) are fixedly arranged in the rectangular space surrounded by the combustion main pipe (4).

3. The preheating device of a shift fork metal mold according to claim 1, characterized by The first combustion branch pipe (5) and the second combustion branch pipe (9) extend along the length direction of the combustion main pipe (4), and the first combustion branch pipe (5) and the second combustion branch pipe (9) are arranged in the width direction of the combustion main pipe (4) and are spaced apart from each other, and each of the first combustion branch pipe (5) and the second combustion branch pipe (9) is provided with a group of first combustion nozzles (11) and a group of second combustion nozzles (12) close to the two sides of the mold.

4. The preheating device of the shift fork metal mold of claim 3, wherein The first combustion nozzle group (11) includes a plurality of first combustion nozzles (11) arranged in the length direction of the first combustion branch pipe (5), and the second combustion nozzle group (12) includes a plurality of second combustion nozzles (12) arranged in the length direction of the second combustion branch pipe (9).

5. The preheating device of the shift fork metal mold of claim 4, wherein The first combustion nozzle (11) corresponds to the fork shaft part of the mold cavity (3) one by one.

6. The preheating device of a shift fork metal mold according to claim 4, characterized by The second combustion nozzle (12) corresponds to the fork part of the mold cavity (3) one by one.

7. The preheating device for the shift fork metal mold according to claim 1, characterized in that: The third combustion branch pipe (10) is provided with a plurality of third combustion branch pipes (10) arranged in the length direction of the combustion main pipe (4), and the third combustion branch pipe (10) corresponds to the mold sprue basin (1) one by one.

8. The preheating device of a shift fork metal mold according to claim 1, wherein The third combustion branch pipe (10) is inclined towards the direction close to the mold sprue basin (1).

9. The preheating device of a shift fork metal mold according to claim 1, wherein The end of the fuel connecting pipe (6) is provided with a joint and a valve.

10. The preheating device of a shift fork metal mold according to claim 1, characterized by The combustion main pipe (4) is provided with a supporting leg (7) close to the lower mold (2).

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