阅读说明：本技术 一种液压模锻锤及其锤油管的焊接工艺 (Hydraulic die forging hammer and welding process of hammer oil pipe thereof ) 是由 高建华 徐占宏 聂国清 张绍岩 张丽 于枭 于 2021-09-03 设计创作，主要内容包括：本发明提供的液压模锻锤技术改进及其锤油管焊接工艺,焊接时具体为将厚壁高压弯管搭接在T型接头内,对内部搭接部位进行多点焊接,用手锤敲击厚壁高压弯管无应力后,拆下固定工装,采用氩弧焊机对厚壁高压弯管和T型接头的其余接触部位进行焊接,采用对角焊接的方式间歇性焊接外部搭接部位；焊接完后用角磨机对内外部搭接部位的焊点磨平,在外部搭接部位安装并并焊接管箍；将焊接后的管路放到600度的气氛炉内回火去应力处理,取出后的管路,采用气动砂轮机对内部搭接部位进行打磨,缺少酸洗硫化部分内容,将焊接后的管路进行清洗处理,达到安装状态。(The invention provides a hydraulic die forging hammer technology improvement and a hammer oil pipe welding process thereof.A thick-wall high-pressure bent pipe is lapped in a T-shaped joint during welding, multiple spot welding is carried out on the inner lapped part, the thick-wall high-pressure bent pipe is knocked by a hand hammer without stress, a fixing tool is detached, an argon arc welding machine is adopted to weld the other contact parts of the thick-wall high-pressure bent pipe and the T-shaped joint, and the outer lapped part is intermittently welded in a diagonal welding mode; after welding, grinding welding points of the inner and outer lap joint parts by using an angle grinder, and installing and welding pipe hoops at the outer lap joint parts; and (3) putting the welded pipeline into an atmosphere furnace with the temperature of 600 ℃ for tempering and stress relief treatment, taking out the pipeline, polishing the internal lap joint part by adopting a pneumatic grinder, cleaning the welded pipeline to reach the installation state if the acid-washing vulcanized part is lacked.)

1. The utility model provides a hydraulic pressure die forging hammer, includes the casing, sets up the tup in the casing below, installs the last mould in the tup below, sets up the die holder of lower mould, upper end installation lower mould in last mould below, sets up the stand that is used for collectively walking the line and sets up the hammer oil pipe in the casing, its characterized in that of casing side: the hammer main motor for controlling the lifting of the hammer head is arranged at the top of the shell, a cable of the hammer main motor is fixedly arranged on the side surface of the hammer main motor through a cable clamp, and the cable clamp is used for preventing the cable of the hammer main motor from sparking when the hydraulic die forging hammer works to generate vibration; the circulating oil pump of the hammer head is installed at the top of the shell through the heightening seat, the top of the shell is upwards provided with an outer edge, the position, adjacent to the shell, of the outer edge is provided with an oil discharge port, the heightening seat is used for heightening the circulating oil pump, and when the circulating oil pump leaks oil, dirty oil flows down along the heightening seat and flows out of the oil discharge port; the upper die is provided with an upper fixing block connected with the hammer head in a positioning manner, the lower die is provided with a lower fixing block connected with the die holder in a positioning manner, and the upper fixing block and the lower fixing block are used for increasing the contact area; the safety pin is arranged on the side face of the machine shell and used for locking the upper die, one end of the safety pin is fixedly arranged on the inner sliding block, the inner sliding block is arranged in the outer sliding rail in a sliding mode, the outer sliding rail is fixedly arranged on the side face of the machine shell, and the sliding of the inner sliding block along the outer sliding rail is controlled through the air cylinder arranged in the machine shell; the upright post is provided with an operation small screen, and the operation small screen is used for observing the running condition of equipment and adjusting the striking energy of the hammer head; an electric control cabinet of the equipment is arranged behind the upright post, an operation large screen is arranged on the electric control cabinet, and the operation large screen is used for adjusting the running condition of the equipment.

2. A hydraulic die forging hammer as set forth in claim 1, wherein: the positioning between the hammer head and the machine shell adopts a key groove structure, so that the stability of the hammer head is improved.

3. A hydraulic die forging hammer as set forth in claim 1, wherein: all bolts on the equipment adopt a 12.9-level structure with high strength, so that the phenomena of breakage and loosening of the bolts are prevented.

4. A hydraulic die forging hammer as set forth in claim 1, wherein: the circulating oil pump adopts a YE-125 pump, and the vane pump of the circulating oil pump is quicker in oil return compared with a gear pump.

5. The process for welding the hammer pipe of the hydraulic die forging hammer according to claim 1, comprising the steps of:

step S101: taking the processed T-shaped joint, cleaning the contact surface, and fixing the T-shaped joint in an oil tank of the driving hammer head by using a high-strength bolt;

step S102: taking the processed thick-wall high-pressure bent pipe, and fixing the bent pipe by using a fixing tool;

step S103: overlapping the thick-wall high-pressure bent pipe in the T-shaped joint, and performing multi-point welding on the inner overlapped part by adopting electric welding to ensure that a contact surface has no gap;

step S104: when the overall temperature is reduced to room temperature, knocking the thick-wall high-pressure bent pipe by a hammer without stress, and then detaching the fixing tool;

step S105: welding the other contact parts of the thick-wall high-pressure bent pipe and the T-shaped joint by adopting an argon arc welding machine;

step S106: after welding, an angle grinder is adopted to grind and level electric welding points at the internal lap joint part;

step S107: an external lap part is intermittently welded in a diagonal welding mode;

step S108: after welding, an angle grinder is adopted to grind and flatten the welding spots at the external lap joint part;

step S109: a T-shaped joint and a thick-wall high-pressure bent pipe which are welded together are detached from an oil tank of the driving hammer head;

step S110: installing a pipe hoop at the external lapping part, and welding the pipe hoop on the lapping part;

step S111: putting the welded pipeline into an atmosphere furnace with the temperature of 600 ℃ integrally, carrying out tempering and stress relief treatment, and naturally cooling after heat preservation for 6 hours;

step S112: taking out the welded pipeline, and polishing the inner lap joint part by adopting a pneumatic grinder until the inner wall is smooth and has no high point;

step S113: sealing two ends of the welded pipeline, filling hydrochloric acid, standing for 20min, replacing hydrochloric acid, and standing for 20min again;

step S114: pouring out the hydrochloric acid, and washing the inner wall with clear water;

step S115: finally, cleaning with compressed air to reach the installation state.

6. The process for welding the hammer oil pipe of the hydraulic die forging hammer according to claim 5, wherein: and the contact surface of the thick-wall high-pressure bent pipe is subjected to 30-degree chamfering treatment.

7. The process for welding the hammer oil pipe of the hydraulic die forging hammer according to claim 5, wherein: the welding rod used for the multi-spot welding in step S103 is 506.

8. The process for welding the hammer oil pipe of the hydraulic die forging hammer according to claim 5, wherein: the welding current of the argon arc welding machine is 110A, the argon flow is 6L/min, the welding rod is a No. 50 alloy steel welding rod with the diameter of 2mm, and the ceramic nozzle is the largest model.

9. The process for welding the hammer oil pipe of the hydraulic die forging hammer according to claim 5, wherein: the number of operation passes of the diagonal welding in step S107 is at least 3.

10. The process for welding the hammer oil pipe of the hydraulic die forging hammer according to claim 5, wherein: the width of the weld crater of the pipe hoop and the external lap joint part is 8 mm.

Technical Field

The invention belongs to the technical field of welding, and particularly relates to a hydraulic die forging hammer and a welding process of a hammer oil pipe thereof.

Background

The hydraulic die forging is a device which is driven by a motor and works by hydraulic pressure in a short stroke, and mainly works in the forging industry, and a driving hammer head works in a full hydraulic transmission mode, namely the driving hammer head moves up and down through constant pressure oil. 60% of energy comes from pressure oil during striking, 40% of energy is converted from hammer head potential energy, and the transmission mode enables the hammer head to obtain huge kinetic energy within a short stroke, so that high-frequency forging is possible.

However, the hammer elbow of the hydraulic die forging equipment generally has a problem of pipeline cracking, particularly, the phenomenon that the pipeline cracks under the condition that the average service life of a welding seam is different from 3 to 6 months, and the measures adopted are not exactly: 1) the hammer elbow is replaced, the purchase cost of the imported hammer elbow is about 42670.77 yuan (no tax), and the price is high; 2) the hammer elbow is repaired, the mean time to failure is about 16 to 24 hours, and at least 2 persons are needed for matching, so that the time and the labor are consumed. In addition, the following problems are also found in a plurality of maintenance processes: firstly, the maintenance process can cause the oil in the oil tank to become dirty, and further the service life of the corresponding part is influenced; secondly, the cleaning operation process of the oil tank after maintenance is extremely complex, the maintenance operation space is small, and the difficulty is high; and thirdly, when the traditional repair welding maintenance process is used for welding, under the condition that three 50# alloy steel welding rods are replaced in the future, air holes still can be generated at the welding part, and the maintenance (welding) effect is poor. In addition, along with the increase of the service cycle of the hydraulic die forging hammer, the stability of the hammer head is gradually reduced, the deviation of the pressing weight and the pressing position is large, and the rejection rate is greatly increased.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a hydraulic die forging hammer.

The technical scheme of the invention is as follows:

a hydraulic die forging hammer comprises a shell, a hammer head arranged below the shell, an upper die arranged below the hammer head, a lower die arranged below the upper die, a die holder with the lower die arranged at the upper end, an upright post arranged on the side of the shell and used for collectively wiring, and a hammer oil pipe arranged in the shell, wherein a hammer main motor for controlling the hammer head to lift is arranged at the top of the shell; the circulating oil pump of the hammer head is installed at the top of the shell through the heightening seat, the top of the shell is upwards provided with an outer edge, the position, adjacent to the shell, of the outer edge is provided with an oil discharge port, the heightening seat is used for heightening the circulating oil pump, and when the circulating oil pump leaks oil, dirty oil flows down along the heightening seat and flows out of the oil discharge port; the upper die is provided with an upper fixing block connected with the hammer head in a positioning manner, the lower die is provided with a lower fixing block connected with the die holder in a positioning manner, and the upper fixing block and the lower fixing block are used for increasing the contact area; the safety pin is arranged on the side face of the machine shell and used for locking the upper die, one end of the safety pin is fixedly arranged on the inner sliding block, the inner sliding block is arranged in the outer sliding rail in a sliding mode, the outer sliding rail is fixedly arranged on the side face of the machine shell, and the sliding of the inner sliding block along the outer sliding rail is controlled through the air cylinder arranged in the machine shell; the upright post is provided with an operation small screen, and the operation small screen is used for observing the running condition of equipment and adjusting the striking energy of the hammer head; an electric control cabinet of the equipment is arranged behind the upright post, an operation large screen is arranged on the electric control cabinet, and the operation large screen is used for adjusting the running condition of the equipment.

Preferably, the positioning between the hammer head and the machine shell adopts a key groove structure, so that the stability of the hammer head is improved.

As the optimization of the invention, all bolts on the equipment adopt a high-strength 12.9-grade structure, and the phenomena of breakage and loosening of the bolts are prevented.

As the optimization of the invention, the circulating oil pump adopts a YE-125 pump, and the vane pump of the circulating oil pump can return oil faster than a gear pump.

The invention also aims to provide a hammer oil pipe welding process of the hydraulic die forging hammer, which comprises the following steps:

step S101: taking the processed T-shaped joint, cleaning the contact surface, and fixing the T-shaped joint in an oil tank of the driving hammer head by using a high-strength bolt;

step S102: taking the processed thick-wall high-pressure bent pipe, and fixing the bent pipe by using a fixing tool;

step S103: overlapping the thick-wall high-pressure bent pipe in the T-shaped joint, and performing multi-point welding on the inner overlapped part by adopting electric welding to ensure that a contact surface has no gap;

step S104: when the overall temperature is reduced to room temperature, knocking the thick-wall high-pressure bent pipe by a hammer without stress, and then detaching the fixing tool;

step S105: welding the other contact parts of the thick-wall high-pressure bent pipe and the T-shaped joint by adopting an argon arc welding machine;

step S106: after welding, an angle grinder is adopted to grind and level electric welding points at the internal lap joint part;

step S107: an external lap part is intermittently welded in a diagonal welding mode;

step S108: after welding, an angle grinder is adopted to grind and flatten the welding spots at the external lap joint part;

step S109: a T-shaped joint and a thick-wall high-pressure bent pipe which are welded together are detached from an oil tank of the driving hammer head;

step S110: installing a pipe hoop at the external lapping part, and welding the pipe hoop on the lapping part;

step S111: putting the welded pipeline into an atmosphere furnace with the temperature of 600 ℃ integrally, carrying out tempering and stress relief treatment, and naturally cooling after heat preservation for 6 hours;

step S112: taking out the welded pipeline, and polishing the inner lap joint part by adopting a pneumatic grinder until the inner wall is smooth and has no high point;

step S113: sealing two ends of the welded pipeline, filling hydrochloric acid, standing for 20min, replacing hydrochloric acid, and standing for 20min again;

step S114: pouring out the hydrochloric acid, and washing the inner wall with clear water;

step S115: finally, cleaning with compressed air to reach the installation state.

Preferably, the contact surface of the thick-walled high-pressure bent pipe is chamfered by 30 degrees.

Preferably, the welding rod used for the multi-spot welding in step S103 is 506.

Preferably, the welding current of the argon arc welding machine is 110A, the argon flow is 6L/min, the welding rod is a No. 50 alloy steel welding rod with the diameter of 2mm, and the ceramic nozzle is the largest type.

Preferably, the number of times of the diagonal welding in step S107 is at least 3.

Preferably, the weld crater width of the overlapping part of the pipe hoop and the outside is 8 mm.

The invention has the following beneficial effects:

according to the hydraulic die forging hammer and the welding process of the hammer oil pipe, the hammer oil pipe is manufactured independently, the cost is low, a German import is not needed, the expenditure is saved, manpower and material resources consumed by maintaining the hammer elbow are saved, the safety pin, the upper fixing block and the lower fixing block are added, and the stability of the hammer head is improved. The circulating oil pump changes the installation position, is originally installed on the stand column and is installed above the casing, so that the length of a pipeline is saved, and the risk of oil leakage is reduced. Most importantly, the hammer oil pipe is replaced by the existing hydraulic die forging equipment, the rejection rate in the operation process is reduced from 11 months to 11 months in 2019, the cracking phenomenon of the hammer oil pipe does not occur in the use process, and the hammer oil pipe welded by the process has overlong use value. In addition, the phenomenon that hydraulic oil is beaten due to dirt in the process of maintaining and welding for many times is effectively avoided due to the overlong service time, the stability of hydraulic die forging equipment is improved, and the rejection rate of products is reduced.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a partial structural diagram of the first embodiment of the present invention.

Fig. 3 is a partial structural view of the present invention.

Fig. 4 is a partial structural view of the present invention.

Fig. 5 is a partial structural view of the present invention.

Fig. 6 is a partial structural view of the present invention.

Wherein the reference numerals are: the device comprises a machine shell 1, a hammer head 2, an upper die 3, a lower die 4, a die holder 5, an upright post 6, a hammer main motor 7, a cable 71, a wire clamp 72, a circulating oil pump 8, a heightening seat 81, an outer edge 11, an oil discharge port 12, an upper fixing block 31, a lower fixing block 41, a safety pin 9, an inner sliding block 91, an outer sliding rail 92, an operation small screen 10 and an electric control cabinet 13.

Detailed Description

The present invention will be described in detail below for better understanding of the technical solutions of the present invention and the advantages thereof by those skilled in the art, but the present invention is not limited thereto.

In the description of the present application, it should be noted that the terms "in", "under", and the like indicate the orientation or positional relationship: the particular arrangements or components shown in the drawings, or the orientations or positional relationships conventionally used in the manufacture of the applications, are for convenience only and to simplify the description, and are not intended to indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and are not to be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Example 1

Referring to FIG. 1: a hydraulic die forging hammer comprises a machine shell 1, a hammer head 2 arranged below the machine shell 1, an upper die 3 arranged below the hammer head 2, a lower die 4 arranged below the upper die 3, a die holder 5 with the lower die 4 arranged at the upper end, a stand column 6 arranged on the side of the machine shell 1 and used for collectively routing and a hammer oil pipe arranged in the machine shell 1, wherein a hammer main motor 7 for controlling the hammer head 2 to lift is arranged at the top of the machine shell 1, a cable 71 of the hammer main motor 7 is fixedly arranged on the side surface of the hammer main motor 7 through a wire clamp 72, and the wire clamp 72 is used for preventing the cable 71 of the hammer main motor 7 from being ignited when the hydraulic die forging hammer works to generate vibration (see figure 4); the circulating oil pump 8 of the hammer 2 is mounted at the top of the machine shell 1 through a heightening seat 81 (see fig. 6), the top of the machine shell 1 is upwards provided with an outer edge 11, an oil discharge opening 12 is formed in the position, adjacent to the machine shell 1, on the outer edge 11, the heightening seat 81 is used for heightening the circulating oil pump 8, when the circulating oil pump 8 leaks oil, dirty oil flows down along the heightening seat 81 and flows out from the oil discharge opening 12, and the situation that the dirty oil returns to a main oil tank to cause oil tank pollution is avoided (see fig. 3); the upper die 3 is provided with an upper fixed block 31 which is connected with the hammer 2 in a positioning way, the lower die 4 is provided with a lower fixed block 41 which is connected with the die holder 5 in a positioning way, the upper fixed block 31 and the lower fixed block 41 are used for increasing the contact area, the fixed blocks are wedge-shaped, and the diameter of the positioning pin of the minimum throw figure is 80mm so as to increase the contact area (refer to fig. 5); a safety pin 9 is arranged on the side surface of the machine shell 1, the safety pin 9 is used for locking the upper die 3, one end of the safety pin 9 is fixedly arranged on an inner slide block 91, the inner slide block 91 is slidably arranged in an outer slide rail 92, the outer slide rail 92 is fixedly arranged on the side surface of the machine shell 1, and the sliding of the inner slide block 91 along the outer slide rail 92 is controlled by an air cylinder arranged in the machine shell 1 (refer to fig. 2); an operation small screen 10 is arranged on the upright post 6, and the operation small screen 10 is used for observing the running condition of equipment and adjusting the striking energy of the hammer 2; an electric control cabinet 13 of the equipment is arranged behind the upright post 6, an operation large screen is arranged on the electric control cabinet 13 and used for adjusting the running condition of the equipment, and operation and maintenance personnel can conveniently troubleshoot the equipment problems.

The temperature of the hammer main motor 7 can be displayed on the operation large screen, the upper temperature limit is set on the operation large screen, when the temperature of the hammer main motor 7 exceeds the upper temperature limit, the device alarms and stops, and the 75KW large motor can be well protected.

The positioning between the hammer 2 and the machine shell 1 adopts a key groove structure, so that the stability of the hammer is improved.

All bolts on the equipment adopt a 12.9-level structure with high strength, so that the phenomena of breakage and loosening of the bolts are prevented.

The circulating oil pump 8 adopts a YE-125 pump, and a vane pump of the circulating oil pump is quick in oil return compared with a gear pump, so that the requirement of forging large parts can be met, the liquid level of the auxiliary oil tank is sufficient, and quick striking is realized.

Example 2

A hammer oil pipe welding process of a hydraulic die forging hammer comprises the following steps:

step S101: taking the processed T-shaped joint, cleaning the contact surface, and fixing the T-shaped joint in an oil tank of the driving hammer head 2 by using a high-strength bolt;

step S102: taking the processed thick-wall high-pressure bent pipe, guiding a chamfer of 30 degrees, and fixing by using a fixing tool;

step S103: overlapping the thick-wall high-pressure bent pipe in the T-shaped joint, and performing multi-point welding on the inner overlapped part by adopting electric welding, wherein the welding rod is 506, so that no gap is formed on the contact surface;

step S104: when the overall temperature is reduced to room temperature, knocking the thick-wall high-pressure bent pipe by a hammer without stress, and then detaching the fixing tool;

step S105: welding the other contact parts of the thick-wall high-pressure bent pipe and the T-shaped joint by using an argon arc welding machine, wherein the welding current is 110A, the argon flow is 6L/min, the welding rod is a No. 50 alloy steel welding rod with the diameter of 2mm, and the ceramic nozzle is the largest type;

step S106: after welding, an angle grinder is adopted to grind and level electric welding points at the internal lap joint part;

step S107: intermittently welding an external lap part in a diagonal welding mode for 3 times;

step S108: after welding, an angle grinder is adopted to grind and flatten the welding spots at the external lap joint part;

step S109: a T-shaped joint and a thick-wall high-pressure bent pipe which are welded together are detached from an oil tank of the driving hammer 2;

step S110: installing a pipe hoop at the external lapping part, and welding the pipe hoop on the lapping part, wherein the width of a welding opening of the pipe hoop and the external lapping part is 8 mm;

step S111: putting the welded pipeline into an atmosphere furnace with the temperature of 600 ℃ integrally, carrying out tempering and stress relief treatment, and naturally cooling after heat preservation for 6 hours;

step S112: taking out the welded pipeline, and polishing the inner lap joint part by adopting a pneumatic grinder until the inner wall is smooth and has no high point;

step S113: sealing two ends of the welded pipeline, filling hydrochloric acid, standing for 20min, replacing hydrochloric acid, and standing for 20min again;

step S114: pouring out the hydrochloric acid, and washing the inner wall with clear water;

step S115: finally, cleaning with compressed air to reach the installation state.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.