A powder forming method for an electric nail gun nozzle

Abstract

The application provides a powder forming method of an electric nail gun nozzle. The powder forming method of the electric nail gun nozzle comprises the following steps: S1, forming: pre-alloyed iron powder is filled into a pressing mold for pressing forming to obtain a green body; the green body after pressing is subjected to a demolding procedure; after demolding, the appearance, density, strength and the like of the green body are detected to check whether the green body meets the requirements; S2, sintering: the green body is heated at a preheating first-stage temperature of 550-600 DEG C for 15 min and at a preheating second-stage temperature of 650-700 DEG C for 15 min in a mixed gas atmosphere of N2 and NH3. The powder forming method of the electric nail gun nozzle provided by the application is more suitable for mass production, the raw material cost is lower than the cost of cast steel, the green body qualified rate after forming and pressing is effectively improved, the holes in the direction perpendicular to the end face do not need to be finished, the machining cost is reduced, the raw material is reasonable, the preparation process ensures that the product has high precision and high strength.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric nail gun accessory processing, in particular to a powder forming method of an electric nail gun nozzle. BACKGROUND

[0002] The electric nail gun is widely used in the construction industry, interior decoration and packaging industry, and its technical features are as follows: direct use of electric energy, energy-saving device and impact force adjusting switch are arranged in the circuit, and the impact force can be adjusted according to the length of the nail. Compared with the existing pneumatic nail gun technology, the product can be used without spending money to buy a gas pump, and it has low energy consumption, low noise, large impact force, and simple structure, and is easy to use.

[0003] As an important part of the gun nozzle, it is generally produced by cast steel process. However, the cast steel process cannot directly form the product with high dimensional accuracy, but first casts a blank and then finishes it through machining process, which takes a long time and costs high.

[0004] Therefore, it is necessary to provide a powder forming method of an electric nail gun nozzle to solve the above technical problems. SUMMARY

[0005] The present application provides a powder forming method of an electric nail gun nozzle, which solves the problems of low product precision, slow production efficiency and high cost in the existing cast steel technology.

[0006] To solve the above technical problems, the powder forming method of the electric nail gun nozzle provided by the present application comprises the following steps:

[0007] S1, forming: filling pre-alloyed iron powder into a pressing mold for pressing forming to obtain a green body, the green body after pressing is subjected to a demolding program, and after demolding, the appearance, density and strength of the green body are detected to determine whether it meets the requirements;

[0008] S2, sintering: in the atmosphere of N2 and NH3 mixed gas, the green body is heated at a preheating first stage temperature of 550-600 DEG C for 15 min, a preheating second stage temperature of 650-700 DEG C for 15 min, a preheating third stage temperature of 750-800 DEG C for 15 min, a high temperature first stage temperature of 980-1020 DEG C for 16 min, a high temperature second stage temperature of 1100-1130 DEG C for 17 min, a high temperature third stage temperature of 1130-1180 DEG C for 17 min, and then cooled to 100 DEG C for 110 min to obtain the product;

[0009] S3, machining: the recess on the end face of the product, and the clamping groove and hole on the boss are machined by finishing;

[0010] S4, heat treatment: heat treatment is carried out on the product by a box furnace, the product is sent into the furnace, heated to 670-690 DEG C with the furnace, and kept for 1h, then heated to 860-950 DEG C with the furnace, and kept for 1-6h, after furnace discharge, air cooling is adopted, and the core rail surface is cooled to 210-400 DEG C, and then air cooling or slow cooling is adopted; the product is heated from room temperature to 230-350 DEG C, kept for 1.5-5h for tempering, and after furnace discharge, industrial fan cooling is adopted.

[0011] Preferably, the pre-alloyed iron powder in S1 adopts FD0205, and the green density is 7.0-7.1g / cm3.

[0012] Preferably, the pre-alloyed iron powder in S1 is filled into the pressing mold at one time, so as to cover the bottom surface of the mold, and the green body is obtained by forming and pressing, and the single filling amount is controlled to be 100-110g.

[0013] Preferably, the flow rate of N2 in S2 is 15m3 / h, and the flow rate of NH3 is 6m3 / h.

[0014] Preferably, the preheating first-stage temperature in S2 is 600 DEG C, the preheating second-stage temperature is 700 DEG C, and the preheating third-stage temperature is 800 DEG C.

[0015] Preferably, the high-temperature first-stage temperature in S2 is 1020 DEG C, the high-temperature second-stage temperature is 1130 DEG C, and the high-temperature third-stage temperature is 1130 DEG C.

[0016] Preferably, the air cooling in S4 is at a cooling rate of 5-30 DEG C / min.

[0017] Preferably, the air cooling or slow cooling in S4 is at a cooling rate of 1-4 DEG C / min.

[0018] Preferably, after furnace discharge, industrial fan cooling is adopted in S4, and the cooling rate is 1-20 DEG C / min.

[0019] Compared with the related art, the powder forming method of the gun nozzle of the electric nail gun has the following beneficial effects:

[0020] The powder forming method of the gun nozzle of the electric nail gun is more suitable for mass production, the raw material cost is lower than the cost of cast steel, the qualified rate of the green body after forming and pressing is effectively improved, the holes in the direction perpendicular to the end surface do not need to be finished, the machining cost is reduced, the raw material is reasonable, and the preparation process ensures that the product has high precision and high strength. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The flowchart of the preferred embodiment of the powder forming method of the gun nozzle of the electric nail gun is provided.

[0022] Figure 2 A blank drawing of the electric nail gun nozzle provided by the present invention;

[0023] Figure 3 for Figure 2 The image shows a front view of the nozzle of an electric nail gun;

[0024] Figure 4 for Figure 2 The image shows a side view of the nozzle of an electric nail gun.

[0025] Figure 5 for Figure 1 The side sectional view of the nozzle of the electric nail gun shown;

[0026] Figure 6 for Figure 3 The enlarged schematic diagram of part A shown below;

[0027] Figure 7 for Figure 4 The enlarged schematic diagram of section B is shown below;

[0028] Figure 8 for Figure 5 The enlarged schematic diagram of section C is shown. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 ,in, Figure 1 A schematic flowchart illustrating a preferred embodiment of a powder forming method for an electric nail gun nozzle provided by the present invention; Figure 2 A blank drawing of the electric nail gun nozzle provided by the present invention; Figure 3 for Figure 2 The image shows a front view of the nozzle of an electric nail gun; Figure 4 for Figure 2 The image shows a side view of the nozzle of an electric nail gun. Figure 5 for Figure 1 The side sectional view of the nozzle of the electric nail gun shown; Figure 6 for Figure 3 The enlarged schematic diagram of part A shown below; Figure 7 for Figure 4 The enlarged schematic diagram of section B is shown below; Figure 8 for Figure 5 The enlarged schematic diagram of section C is shown. Example 1

[0031] A powder forming method of an electric nail gun nozzle, comprising the following steps:

[0032] S1, forming: pre-alloyed iron powder is filled into a pressing mold for pressing forming, the pre-alloyed iron powder is filled into the pressing mold at one time to cover the bottom surface of the mold, and then forming pressing is performed to obtain a green body, the amount of single filling is controlled to be 100 g, and the green body is obtained, the pre-alloyed iron powder adopts FD0205, the green body density thereof is 7.0 g / cm3, and the green body after completing pressing enters a demolding program, after demolding is completed, the appearance, density, strength and the like of the green body are detected to detect whether the green body meets the requirements;

[0033] S2, sintering: in an atmosphere of mixed N2 and NH3, the flow rate of N2 is 15 m3 / h, the flow rate of NH3 is 6 m3 / h, the green body is heated at a preheating first-stage temperature of 550℃ for 15 min, at a preheating second-stage temperature of 650℃ for 15 min, at a preheating third-stage temperature of 750℃ for 15 min, at a high-temperature first-stage temperature of 980℃ for 16 min, at a high-temperature second-stage temperature of 1100℃ for 17 min, and at a high-temperature third-stage temperature of 1130℃ for 17 min, and then cooled to 100℃ for 110 min to obtain a product;

[0034] S3, machining: grooves on the end surface of the product, and clamping grooves and holes on the boss are machined out through finishing;

[0035] S4, heat treatment: the product is heat treated through a box-type furnace, the product is sent into the furnace, heated to 670-690℃ along with the furnace, kept warm for 1 h, then heated to 860-950℃ along with the furnace, kept warm for 1 h, after being taken out of the furnace, air cooling is adopted, the cooling rate is 5℃ / min, and the product is cooled to 210℃ on the surface of the heart rail, and then air cooling or slow cooling is adopted, the cooling rate is 1℃ / min; the product is heated to 230℃ from room temperature, kept warm for 1.5 h for tempering, after being taken out of the furnace, an industrial fan is used for cooling, and the cooling rate is 5℃ / min. Example 2

[0036] A powder forming method of an electric nail gun nozzle, comprising the following steps:

[0037] S1, forming: pre-alloyed iron powder is filled into a pressing mold for pressing forming, the pre-alloyed iron powder is filled into the pressing mold at one time to cover the bottom surface of the mold, and then forming pressing is performed to obtain a green body, the amount of single filling is controlled to be 100 g, and the green body is obtained, the pre-alloyed iron powder adopts FD0205, the green body density thereof is 7.0 g / cm3, and the green body after completing pressing enters a demolding program, after demolding is completed, the appearance, density, strength and the like of the green body are detected to detect whether the green body meets the requirements;

[0038] S2, sintering: in the atmosphere of mixed gas of N2 and NH3, the flow rate of N2 is 15 m3 / h, the flow rate of NH3 is 6 m3 / h, the green body is heated at a preheating first-stage temperature of 600 DEG C for 15 min, at a preheating second-stage temperature of 700 DEG C for 15 min, at a preheating third-stage temperature of 800 DEG C for 15 min, at a high-temperature first-stage temperature of 1020 DEG C for 16 min, at a high-temperature second-stage temperature of 1130 DEG C for 17 min, at a high-temperature third-stage temperature of 1130 DEG C for 17 min, and then cooled to 100 DEG C for 110 min, to obtain the product;

[0039] S3, machining: the recess on the end face of the product, and the clamping groove and hole on the boss are machined out through finish machining;

[0040] S4, heat treatment: the product is heat treated by a box-type furnace, the product is fed into the furnace, heated to 690 DEG C with the furnace, kept for 1 h, then heated to 950 DEG C with the furnace, kept for 3 h, after being discharged from the furnace, air cooling is adopted, the cooling rate is 15 DEG C / min, and the heart rail surface is cooled to 300 DEG C, then air cooling or slow cooling is adopted, the cooling rate is 2 DEG C / min; the product is heated to 280 DEG C from room temperature, kept for 3 h for tempering, after being discharged from the furnace, industrial fan cooling is adopted, and the cooling rate is 10 DEG C / min. Example 3

[0041] A powder forming method of an electric nail gun nozzle, comprising the following steps:

[0042] S1, forming: pre-alloyed iron powder is filled into a pressing mold for pressing forming, the pre-alloyed iron powder is filled into the pressing mold at one time, so as to cover the bottom surface of the mold, and the green body is obtained by forming pressing, the filling amount of the pre-alloyed iron powder is controlled to be 110 g at one time, the green body is obtained, the pre-alloyed iron powder is FD0205, the green body density is 7.1 g / cm3, and the green body after completing the pressing is subjected to a demolding procedure; after the demolding is completed, the appearance, density and strength of the green body are detected to detect whether the green body meets the requirements;

[0043] S2, sintering: in the atmosphere of mixed gas of N2 and NH3, the flow rate of N2 is 15 m3 / h, the flow rate of NH3 is 6 m3 / h, the green body is heated at a preheating first-stage temperature of 600 DEG C for 15 min, at a preheating second-stage temperature of 700 DEG C for 15 min, at a preheating third-stage temperature of 800 DEG C for 15 min, at a high-temperature first-stage temperature of 1020 DEG C for 16 min, at a high-temperature second-stage temperature of 1130 DEG C for 17 min, at a high-temperature third-stage temperature of 1130 DEG C for 17 min, and then cooled to 100 DEG C for 110 min, to obtain the product;

[0044] S3, machining: the recess on the end face of the product, and the clamping groove and hole on the boss are machined out through finish machining;

[0045] S4, heat treatment: the product is heat treated by a box furnace, the product is sent into the furnace, heated to 690 DEG C with the furnace, heat preservation 1h, then heated to 950 DEG C with the furnace, heat preservation 6 hours, after furnace discharge, air cooling is used, its cooling rate is 30 DEG C / min, cools to the heart rail surface 400 DEG C, then air cooling or slow cooling, its cooling rate is 4 DEG C / min;The product is heated from room temperature to 350 DEG C, heat preservation 5h is tempered, after furnace discharge, industrial fan cooling is used, the cooling rate is 20 DEG C / min. Example 4

[0046] A powder forming method of an electric nail gun nozzle, comprising the following steps:

[0047] S1, forming: the pre-alloyed iron powder is filled into a pressing mold for pressing forming, the pre-alloyed iron powder is filled into the pressing mold at one time, so as to cover the bottom surface of the mold, and the green body is obtained by forming pressing, the filling amount of each time is controlled to be 110g, the green body is obtained, the pre-alloyed iron powder adopts FD0205, and the green body density is 7.1g / cm3, the green body after completing pressing enters a demolding procedure, after demolding, the appearance, density and strength of the green body are detected to detect whether the green body meets the requirements or not;

[0048] S2, sintering: in the atmosphere of N2 and NH3 mixed gas, the flow rate of N2 is 15m3 / h, the flow rate of NH3 is 6m3 / h, the green body is heated at a preheating first section temperature of 600 DEG C for 15min, at a preheating second section temperature of 700 DEG C for 15min, at a preheating third section temperature of 800 DEG C for 15min, at a high temperature first section temperature of 1020 DEG C for 16min, at a high temperature second section temperature of 1130 DEG C for 17min, and at a high temperature third section temperature of 1180 DEG C for 17min, and then cooled to 100 DEG C for 110min to obtain the product;

[0049] S3, machining: the recess on the end surface of the product, and the clamping groove and hole on the boss are machined out by finishing;

[0050] S4, heat treatment: the product is heat treated by a box furnace, the product is sent into the furnace, heated to 690 DEG C with the furnace, heat preservation 1h, then heated to 950 DEG C with the furnace, heat preservation 6 hours, after furnace discharge, air cooling is used, its cooling rate is 30 DEG C / min, cools to the heart rail surface 400 DEG C, then air cooling or slow cooling, its cooling rate is 4 DEG C / min;The product is heated from room temperature to 350 DEG C, heat preservation 5h is tempered, after furnace discharge, industrial fan cooling is used, the cooling rate is 20 DEG C / min.

[0051] Compared with the related art, the powder forming method of the electric nail gun nozzle provided by the application has the following beneficial effects:

[0052] The powder molding process mentioned in the application is more suitable for mass production, the raw material cost is lower than the cost of cast steel, and the qualified rate of the green body after molding is effectively improved, no finishing is needed for the holes perpendicular to the end surface direction, the machining cost is reduced, the raw material is reasonable, and the preparation process ensures that the product has high precision and high strength.

[0053] The above description is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the application.

Claims

1. A powder forming method for an electric nail gun nozzle, characterized in that, Includes the following steps: S1. Molding: The pre-alloyed iron powder is filled into the pressing mold and pressed to obtain a green blank. The pre-alloyed iron powder is FD0205, and its green blank density is 7.0-7.1g / cm3. After pressing, the green blank enters the demolding process. After demolding, the appearance, density, strength, etc. of the green blank are tested to check whether they meet the requirements. S2, Sintering: In a mixed gas atmosphere of N2 and NH3, the green body is heated at a preheating stage temperature of 550-600℃ for 15 min, a preheating stage temperature of 650-700℃ for 15 min, a preheating stage temperature of 750-800℃ for 15 min, a high temperature stage temperature of 980-1020℃ for 16 min, a high temperature stage temperature of 1100-1130℃ for 17 min, a high temperature stage temperature of 1130-1180℃ for 17 min, and then cooled to 100℃ for 110 min to obtain the product; S3. Machining: The grooves on the end face of the product, as well as the slots and holes on the boss, are machined through precision machining. S4. Heat Treatment: The product is heat-treated in a box furnace. The product is placed in the furnace and heated to 670-690℃, held for 1 hour, then heated to 860-950℃ and held for 1-6 hours. After being taken out of the furnace, it is air-cooled to 210-400℃ on the surface of the core rail, and then air-cooled or slow-cooled. The product is then heated from room temperature to 230-350℃ and held for 1.5-5 hours for tempering. After being taken out of the furnace, it is cooled using an industrial fan. The preheating temperature in S2 is 600℃, the preheating temperature in the second stage is 700℃, and the preheating temperature in the third stage is 800℃. The high temperature in S2 is 1020℃, the high temperature in the second stage is 1130℃, and the high temperature in the third stage is 1130℃. In step S1, pre-alloyed iron powder is filled into the pressing mold in one go, covering the bottom surface of the mold, and then pressed to obtain a green blank. The amount of filling in one go is controlled to be 100-110g. In step S2, the N2 flow rate is 15m3 / h and the NH3 flow rate is 6m3 / h.

2. The powder forming method for an electric nail gun nozzle according to claim 1, characterized in that, The S4 is air-cooled, and its cooling rate is 5-30℃ / min.

3. The powder forming method for an electric nail gun nozzle according to claim 1, characterized in that, The S4 is either air-cooled or slow-cooled, with a cooling rate of 1-4 ℃ / min.

4. The powder forming method for an electric nail gun nozzle according to claim 1, characterized in that, After exiting the furnace in step S4, an industrial fan is used to cool the furnace at a rate of 1-20℃ / min.

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