Electric heating hammer head for electro-hydraulic hammer

Abstract

The utility model discloses an electric heating hammerhead for an electro-hydraulic hammer, which comprises a hammerhead body, a heating hole and a temperature detection hole are arranged on the side wall of the hammerhead body, a heating unit is arranged in the heating hole, and a temperature detection unit is arranged in the temperature detection hole. According to the electric heating hammerhead for the electro-hydraulic hammer, the heating unit and the temperature detection unit are arranged in the heating hole and the temperature detection hole in the side wall correspondingly, heating and temperature detection of the hammerhead body are achieved, and the situation that a forge piece is cracked due to the large temperature difference between the forge piece in the high-temperature state and the normal-temperature hammerhead body is avoided; and the heated hammer body eliminates internal stress and is more durable. The electric heating hammer head for the electro-hydraulic hammer is simple in structure and easy to maintain.

Description

Technical Field

[0001] This utility model relates to the field of forging equipment technology, specifically to an electrically heated hammerhead for an electro-hydraulic hammer. Background Technology

[0002] Metal forgings require the use of an electro-hydraulic hammer during the forging process. The temperature difference between the high-temperature forging and the room-temperature electro-hydraulic hammer head is large, and cracks may occur after the forging comes into contact with the hammer head. In addition, the hammer head is subjected to severe impact during use, which can easily generate stress, leading to damage and deformation.

[0003] Therefore, it is necessary to heat the hammerhead of the electro-hydraulic hammer to reduce the temperature difference between the hammerhead and the high-temperature forging, and at the same time eliminate the internal stress of the hammerhead.

[0004] Chinese utility model patent CN206716943U discloses a novel electrically heated hammerhead for a press, comprising a hammerhead body. The hammerhead body includes an upper hollow steel plate and a lower smooth steel plate, which are integrally formed. Four heating wire holes are symmetrically arranged on the upper surface of the upper hollow steel plate, with heating wires positioned between two diagonally opposite holes. The heating wires are located inside the upper hollow steel plate. A heating wire groove is provided on the inner wall of the upper hollow steel plate, and the heating wires are located within the heating wire grooves. Both ends of the heating wires are connected to the two ends of a power source.

[0005] However, the heating hammer mentioned above cannot precisely control the heating temperature of the hammer; and the heating wire of the hammer is located inside the upper hollow steel plate, that is, the heating wire eye is a through hole, and the heating wire is easily damaged; in addition, the hammer is relatively difficult to manufacture. Utility Model Content

[0006] The purpose of this invention is to provide an electrically heated hammerhead for an electro-hydraulic hammer with controllable temperature and simple structure.

[0007] To achieve the above technical effects, the technical solution of this utility model is as follows: an electrically heated hammer head for an electro-hydraulic hammer, comprising a hammer head body, wherein a heating hole and a temperature detection hole are provided on the side wall of the hammer head body, a heating unit is provided in the heating hole, and a temperature detection unit is provided in the temperature detection hole.

[0008] Preferably, to avoid the heating hole and temperature detection hole having a significant impact on the strength of the hammer head, the heating hole and / or temperature detection hole are blind holes.

[0009] Preferably, to prevent the heating unit and / or temperature detection unit from escaping from the heating hole and / or temperature detection hole, the hammer body is fitted with a limiting member in the horizontal direction, the limiting member being used to block the heating unit and / or temperature detection unit from escaping from the heating hole and / or temperature detection hole.

[0010] Preferably, in order to provide a limiting member, the limiting member is a hose clamp.

[0011] Preferably, in order to better house the heating unit in the hammer body, the heating unit includes a heating wire body, which is disposed inside the inner shell of the heating wire, and the inner shell of the heating wire is provided with a buffer protective layer and a heating wire outer shell from the inside to the outside.

[0012] Preferably, in order to ensure good thermal conductivity between the heating wire and the inner shell of the heating wire, a thermally conductive medium is filled between the heating wire body and the inner shell of the heating wire.

[0013] Preferably, in order to protect the heating wire, the heat-conducting medium is copper powder, and the buffer protective layer is composed of tightly wound copper wires.

[0014] Preferably, the heating hole is a circular hole, the inner shell of the heating wire is a cylinder, the buffer protective layer is a ring, the outer shell of the heating wire is a cylinder with a circular opening at the center of one end face, the circular opening is inserted into the inner shell of the heating wire, and the buffer protective layer is located within the space formed by the outer shell of the heating wire and the inner shell of the heating wire.

[0015] Preferably, in order to provide a durable temperature detection unit, the temperature detection unit includes a temperature detection protective shell and a temperature sensor, wherein the temperature detection protective shell is fitted over the temperature sensor.

[0016] Preferably, to ensure the robustness of the temperature detection unit structure, the temperature detection hole is a circular hole, the temperature detection protective shell is a ring, the temperature sensor is a column, and the detection protective shell is an Invar temperature detection protective shell.

[0017] The advantages and beneficial effects of this utility model are as follows:

[0018] The electro-hydraulic hammer uses an electrically heated hammerhead with heating and temperature detection units installed in the heating holes and temperature detection holes on the side wall, respectively, to heat and detect the temperature of the hammerhead body. This avoids cracking of the forging caused by a large temperature difference between the high-temperature forging and the normal-temperature hammerhead body, and the heated hammerhead body eliminates internal stress, making it more durable.

[0019] This electro-hydraulic hammer uses an electrically heated hammerhead with a simple structure and is easy to maintain. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the electrically heated hammer head for the electro-hydraulic hammer of this utility model;

[0021] Figure 2 yes Figure 1 An explosion diagram;

[0022] Figure 3 yes Figure 1 Enlarged view of part A;

[0023] Figure 4 This is a schematic diagram of the heating unit of Embodiment 2 of the electric heating hammer head for the electro-hydraulic hammer of this utility model;

[0024] Figure 5 This is an exploded schematic diagram of the heating unit of Embodiment 2 of the electrically heated hammer head for the electro-hydraulic hammer of this utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the heating unit of Embodiment 2 of the electro-hydraulic hammer head of this utility model;

[0026] Figure 7 This is a schematic diagram of the temperature detection unit of Embodiment 2 of the electro-hydraulic hammer head of this utility model;

[0027] Figure 8 This is an exploded schematic diagram of the temperature detection unit of Embodiment 2 of the electro-hydraulic hammer head of this utility model;

[0028] In the figure: 1. Hammer head body; 201. Heating hole; 202. Temperature detection hole; 3. Heating unit; 301. Heating wire shell; 302. Buffer protective layer; 303. Heating wire inner shell; 304. Heating wire body; 4. Temperature detection unit; 401. Temperature detection protective shell; 402. Temperature sensor; 5. Limiting component. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0030] Example 1

[0031] like Figures 1-3As shown, the electrically heated hammer head for an electro-hydraulic hammer according to an embodiment of this utility model includes: a hammer head body 1, with a heating hole 201 and a temperature detection hole 202 provided on the side wall of the hammer head body 1. A heating unit 3 is provided in the heating hole 201, and a temperature detection unit 4 is provided in the temperature detection hole 202. The heating unit 3 in the heating hole 201 is used to heat the hammer head body 1, and the temperature detection unit 4 in the temperature detection hole 202 is used to detect the temperature of the hammer head body 1. The two work together to achieve precise control of the temperature of the hammer head body 1, so that the hammer head body 1 maintains a suitable temperature when hammering forgings. When the heating hole 201 and temperature detection hole 202 are located close to the bottom of the hammer body 1, the heating unit 3 and / or temperature detection unit 4 inside the heating hole 201 and / or temperature detection hole 202 are subjected to greater pressure from the hammer body 1 when the electro-hydraulic hammer is hammering the forging. This may make them difficult to remove from the hammer body 1 after long-term operation, hindering maintenance. Furthermore, the heating hole 201 and temperature detection hole 202 are located within 1 / 4 to 1 / 2 of the height of the hammer body 1. When the heating hole 201 and / or temperature detection hole 202 are through holes, the heating unit 3 and / or temperature detection unit 4 inside them can be considered as internal supports for the hammer body 1, and the strength of the support depends on the heating unit 3 and / or temperature detection unit 4 itself. Furthermore, when the heating hole 201 and / or temperature detection hole 202 are blind holes, the required volume of support inside the hammer body 1 is reduced.

[0032] When the electro-hydraulic hammer is used to hammer the forging, the heating unit 3 and / or temperature detection unit 4 in the heating hole 201 and / or temperature detection hole 202 may detach from the heating hole 201 and / or temperature detection hole 202 due to vibration and compression caused by deformation inside the hammer body 1. Furthermore, the hammer body 1 is fitted with a limiting member 5 in the horizontal direction to prevent the heating unit 3 and / or temperature detection unit 4 from escaping from the heating hole 201 and / or temperature detection hole 202. Even further, the limiting member 5 can be a hose clamp.

[0033] Example 2

[0034] like Figures 4-8 As shown, the ultrasonic flaw detection device for metal pipes in Embodiment 2 of this utility model is based on Embodiment 1, but the difference is that the heating unit 3 includes a heating wire body 304, which is disposed inside the inner shell 303 of the heating wire. The inner shell 303 of the heating wire is provided with a buffer protective layer 302 and a heating wire outer shell 301 from the inside to the outside.

[0035] Specifically, the heating unit 3 is located inside the hammer body 1 and is subjected to severe vibration and significant compressive force when the electro-hydraulic hammer is used to hammer the forging. The inner shell 303 and the outer shell 301 of the heating wire protect the heating wire body 304, while the buffer protective layer 302 provides a buffering effect for the heating wire body 304. The inner shell 303 and / or the outer shell 301 of the heating wire can be made of Invar steel.

[0036] When heating unit 3 is working, heat is generated from the heating wire body 304, transferred to the inner shell 303, then to the buffer protective layer 302, then to the outer shell 301, and finally to the hammer head body 1. A faster heat transfer speed is more beneficial for quickly raising the temperature of the hammer head body 1. Furthermore, a heat-conducting medium is filled between the heating wire body 304 and the inner shell 303; even further, the heat-conducting medium is copper powder, and the buffer protective layer 302 is composed of tightly wound copper wires. At this time, the copper powder filling the space between the heating wire body 304 and the inner shell 303 results in a faster heat transfer speed between them. Moreover, the buffer protective layer 302, composed of tightly wound copper wires, not only accelerates the heat transfer speed between the inner shell 303 and the outer shell 301, but the tightly wound copper wires themselves also buffer the impact between the inner shell 303 and the outer shell 301, further protecting the heating wire body 304.

[0037] When the heating hole 201 is a round hole, it is simple to drill a hole on the side of the hammer body 1. Furthermore, the heating hole 201 is a round hole, the inner shell of the heating wire 303 is a cylinder, the buffer protective layer 302 is a ring, and the outer shell of the heating wire 301 is a cylinder with a circular opening at the center of one end face. The circular opening is inserted into the inner shell of the heating wire 303, and the buffer protective layer 302 is located in the space formed by the outer shell of the heating wire 301 and the inner shell of the heating wire 303. At this time, the heating wire outer shell 301 of the column has good pressure bearing effect and has no sharp edges, which effectively reduces the stress concentration effect caused by sharp edges; it is not easy to deform after long-term use of the electro-hydraulic hammer, which would make the maintenance of the heating unit 3 difficult; the circular opening is inserted into the heating wire inner shell 303, and it is easy to remove and replace it separately after the heating wire body 304 fails; the buffer protection layer 302 is located in the space formed by the heating wire outer shell 301 and the heating wire inner shell 303, so the buffer protection layer 302 is not easy to detach from the heating unit 3; and when the circular opening is inserted into the heating wire inner shell 303, when the heating wire outer shell 301 deforms, since the contact area between the heating wire inner shell 303 and the buffer protection layer 302 is much larger than the circular opening inserted into the heating wire inner shell 303, the heating wire inner shell 303 is still easy to remove from the heating wire outer shell 301.

[0038] Similar to the structure of heating unit 3, temperature detection unit 4 includes a temperature detection protective shell 401 and a temperature sensor 402, with the temperature detection protective shell 401 fitted onto the temperature sensor 402. Furthermore, the temperature detection hole 202 is a circular hole, the temperature detection protective shell 401 is an annular shape, the temperature sensor 402 is a cylindrical shape, and the temperature detection protective shell 401 is made of Invar steel.

[0039] The specific operating steps for using the electrically heated hammer head of the electro-hydraulic hammer of this invention are as follows:

[0040] S100, turn on the heating unit 3 and the temperature detection unit 4. The temperature detection unit 4 provides real-time temperature data of the hammer body 1. The operator heats the hammer body 1 through the heating unit 3 to keep the temperature of the hammer body 1 within a suitable range.

[0041] S200, Use an electro-hydraulic hammer to hammer the high-temperature forging with the hammer head body 1;

[0042] S300. After the forging is completed, turn off the heating unit 3 and the temperature detection unit 4.

[0043] In this operation, such as in step S200, the operator can adjust the temperature of the hammer body 1 according to real-time needs.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An electrically heated hammer head for an electrohydraulic hammer, comprising a hammer head body (1), characterized in that: The side wall of the hammer body (1) is provided with a heating hole (201) and a temperature detection hole (202). A heating unit (3) is provided in the heating hole (201), and a temperature detection unit (4) is provided in the temperature detection hole (202).

2. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 1, characterized in that, The heating hole (201) and / or temperature detection hole (202) are blind holes.

3. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 1, characterized in that, The hammer body (1) is fitted with a limiting member (5) in the horizontal direction. The limiting member (5) is used to prevent the heating unit (3) and / or the temperature detection unit (4) from escaping from the heating hole (201) and / or the temperature detection hole (202).

4. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 3, characterized in that, The limiting component (5) is a hose clamp.

5. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 1, characterized in that, The heating unit (3) includes a heating wire body (304), which is disposed inside the heating wire inner shell (303). The heating wire inner shell (303) is provided with a buffer protective layer (302) and a heating wire outer shell (301) from the inside to the outside.

6. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 5, characterized in that, A heat-conducting medium is filled between the heating wire body (304) and the heating wire inner shell (303).

7. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 6, characterized in that, The heat-conducting medium is copper powder, and the buffer protective layer (302) is composed of tightly wound copper wires.

8. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 7, characterized in that, The heating hole (201) is a round hole, the inner shell of the heating wire (303) is a cylinder, the buffer protective layer (302) is a ring, the outer shell of the heating wire (301) is a cylinder with a round opening at the center of one end face, the round opening is inserted into the inner shell of the heating wire (303), and the buffer protective layer (302) is located in the space formed by the outer shell of the heating wire (301) and the inner shell of the heating wire (303).

9. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 1, characterized in that, The temperature detection unit (4) includes a temperature detection protective shell (401) and a temperature sensor (402), with the temperature detection protective shell (401) fitted over the temperature sensor (402).

10. The electrically heated hammerhead for an electro-hydraulic hammer according to claim 9, characterized in that, The temperature detection hole (202) is a round hole, the temperature detection protective shell (401) is a ring, the temperature sensor (402) is a cylinder, and the temperature detection protective shell (401) is an Invar temperature detection protective shell (401).

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