Quenching tool special for strengthening surface hardness of workpiece
By systematically combining the flame gun with the cooling device, the problems of uneven hardness distribution and high operation difficulty in flame quenching technology are solved, the uniformity and stability of the quenching effect are achieved, the operation difficulty is reduced, and the workpiece surface is ensured. Hardness and wear resistance.
Patent Information
- Application Number
- CN202420245583.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-01
AI Technical Summary
The existing flame quenching technology has problems of uneven hardness distribution and high operation difficulty, especially water-cooled quenching requires two hands to operate, which can easily lead to mold deformation or insufficient quenching hardness.
A quenching tool that systematically combines flame gun and cooling device is designed. Through the flame sprinkler, acetylene valve, oxygen valve, cooling water pipe and spacing adjustment mechanism, the synchronous operation of flame and cooling water is achieved, reducing operation difficulty and Improve the quenching effect.
The uniformity and stability of the quenching effect are achieved, and the operator's physical consumption and working errors are reduced. By adjusting the distance between the flame and the cooling water, the quenching temperature and cooling speed are controlled, the hardness and wear resistance of the workpiece surface are ensured.
Smart Images
Figure CN222182343U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flame quenching of automobile moulds, and more specifically to a quenching tool specially used for strengthening the surface hardness of a workpiece. Background Art
[0002] At present, many workpieces need to enhance their surface strength and hardness to ensure their performance before being put into use. Therefore, it is necessary to implement surface heat treatment quenching process at specific locations. The basic principle of cast iron quenching is to heat the workpiece to a certain temperature. After the cast iron structure is transformed from a mixed phase of ferrite and pearlite to austenite at high temperature, most of the austenite structure is transformed into martensite structure under the condition of rapid cooling. The martensite structure has the characteristics of high hardness and high wear resistance. In the field of automobile stamping die quenching, the three commonly used quenching processes are: laser quenching, induction quenching, and flame quenching. Laser quenching generally requires a robotic arm with a high degree of automation, which is costly. The hardened layer is shallow, generally around 0.5mm, and the hardness improvement effect is not obvious. The hardened layer is easy to wear and fall off. High frequency and medium frequency are more common when induction quenching is used, the hardened layer is deeper, and the quenching effect is better; but there is a problem of large deformation of the workpiece, which affects the mold precision. For those who are skilled in quenching technology, flame quenching is the most efficient and has the best quenching effect and deformation control.
[0003] Based on the above, the inventors found that: the existing flame quenching generally adopts air cooling, but this type of method has the risk of uneven hardness distribution or insufficient hardness. Water-cooled quenching has high requirements on the operator's operating ability and experience, and generally requires a two-handed quenching method: one hand holds the flame and the other hand holds the quenching gun, and the two hands work together. Slightly improper operation may cause mold deformation or insufficient quenching hardness. Therefore, in view of this, the existing structure is studied and improved, and a quenching tool dedicated to strengthening the surface hardness of workpieces is provided, in order to achieve a more practical purpose. Utility Model Content
[0004] 1. Technical issues to be solved
[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a quenching tool specially used for strengthening the surface hardness of workpieces. This solution combines a flame gun and a cooling device in a systematic way. The equipment has a simple shape, a low manufacturing cost, and is easy to operate.
[0006] 2. Technical solution
[0007] To solve the above problems, the utility model adopts the following technical solutions.
[0008] A quenching tool specially used for strengthening the surface hardness of a workpiece comprises a welding gun, the front end of the welding gun is fixedly connected to a flamethrower pipe, and the rear end of the welding gun is respectively fixedly connected to an acetylene valve and an oxygen valve on the upper and lower sides, a cooling water pipe is arranged on one side of the flamethrower pipe, and a quenching port is provided at the front end of the flamethrower pipe, a cooling water nozzle is provided at the front end of the cooling water pipe, and a liquid flow regulating valve is fixedly connected to the front side of the upper part of the cooling water pipe, a water inlet is provided at the rear end of the cooling water pipe, and a spacing adjustment mechanism is centrally arranged on the opposite surface of the cooling water pipe and the flamethrower pipe, a connecting sleeve is fixedly connected to one side of the lower part of the cooling water pipe, and a sliding block is fixedly connected to the upper and lower sides of the lower part of the cooling water pipe, and movable balls are provided on both sides of the sliding block.
[0009] Furthermore, the spacing adjustment mechanism includes a support frame, the interior of the support frame is provided with guide grooves on both upper and lower sides, and a threaded rod is provided through one side of the support frame, and the two ends of the threaded rod are respectively fixedly connected with a turning handle and a movable ring.
[0010] Furthermore, the acetylene valve and the oxygen valve are both matched with the quenching port, and the water inlet is matched with the cooling water nozzle.
[0011] Furthermore, the sliding block is located inside the guide groove, and the sliding block is slidably connected to the guide groove.
[0012] Furthermore, the movable ball is movably connected to the sliding block, and the outer side of the sliding block is in contact with the inner surface of the guide groove.
[0013] Furthermore, the threaded rod is threadedly connected to the support frame, and the handle is located outside the support frame.
[0014] Furthermore, the movable ring is located inside the connecting sleeve, and the movable ring is movably connected to the connecting sleeve.
[0015] 3. Beneficial effects
[0016] Compared with the prior art, the advantages of the present invention are:
[0017] (1) This scheme can achieve the ideal quenching effect and reduce the user's operating difficulty and physical exertion compared to ordinary flame quenching. During use, the flame heating is at the front of the quenching path, raising the surface temperature of the workpiece to above the eutectoid temperature line of cast iron, generally around 800°C. The cooling water quenching is at the rear of the quenching path. The high-temperature surface is quenched by the cooling water to generate a hard and wear-resistant martensitic structure, which better complies with the principle requirements of quenching heat treatment.
[0018] (2) This scheme enhances the stability of the water-cooled flame quenching operation process and reduces work errors by setting the cooling water nozzle and the quenching port at the same speed, thereby ensuring the uniformity of quenching hardness. By adjusting the distance between the flame and the cooling water pipe through the spacing adjustment mechanism, the quenching temperature and cooling rate can be effectively controlled, thereby affecting the quenching hardness and hardenability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 This is a disassembled diagram of the overall structure of the utility model;
[0021] Figure 3 It is a schematic diagram of the local structure of the cooling water pipe of the utility model;
[0022] Figure 4 It is a structural schematic diagram of the spacing adjustment mechanism of the utility model.
[0023] Explanation of the numbers in the figure: 1. Cooling water pipe; 2. Cooling water nozzle; 3. Flame tube; 4. Quenching port; 5. Spacing adjustment mechanism; 6. Welding gun; 7. Liquid flow regulating valve; 8. Water inlet; 9. Acetylene valve; 10. Oxygen valve; 11. Connecting sleeve; 12. Sliding block; 13. Movable ball; 14. Support frame; 15. Guide groove; 16. Threaded rod; 17. Turning handle; 18. Movable ring. DETAILED DESCRIPTION
[0024] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.
[0025] Example:
[0026] See also Figure 1-4A quenching tool specially used for strengthening the surface hardness of a workpiece comprises a welding gun 6, a flamethrower tube 3 is fixedly connected to the front end of the welding gun 6, and an acetylene valve 9 and an oxygen valve 10 are respectively fixedly connected to the upper and lower sides of the rear end of the welding gun 6, a cooling water pipe 1 is arranged on one side of the flamethrower tube 3, and a quenching port 4 is provided at the front end of the flamethrower tube 3, a cooling water nozzle 2 is provided at the front end of the cooling water pipe 1, and a liquid flow regulating valve 7 is fixedly connected to the front side of the upper part of the cooling water pipe 1, a water inlet 8 is provided at the rear end of the cooling water pipe 1, and a spacing adjustment mechanism 5 is centrally arranged on the opposite surface of the cooling water pipe 1 and the flamethrower tube 3, a connecting sleeve 11 is fixedly connected to one side of the lower part of the cooling water pipe 1, and a sliding block 12 is fixedly connected to the upper and lower sides of the lower part of the cooling water pipe 1, and movable balls 13 are arranged on both sides of the sliding block 12, the acetylene valve 9 is connected to the acetylene tank, the oxygen valve 10 is connected to the oxygen tank, and the water tank is connected to the cooling water pipe 1 through the water inlet 8.
[0027] See also Figure 4 The spacing adjustment mechanism 5 includes a support frame 14, and guide grooves 15 are provided on the upper and lower sides of the support frame 14. A threaded rod 16 is penetrated through one side of the support frame 14, and the two ends of the threaded rod 16 are respectively fixedly connected with a turning handle 17 and a movable ring 18. In order to adjust the distance between the cooling water pipe 1 and the flamethrower 3, a spacing adjustment mechanism 5 is provided.
[0028] See also Figure 2 The acetylene valve 9 and the oxygen valve 10 are both matched with the quenching port 4, and the water inlet 8 is matched with the cooling water nozzle 2. By opening the acetylene valve 9 and the oxygen valve 10, the quenching port 4 can spray flames to heat the surface of the quenching workpiece.
[0029] See also Figure 4 The sliding block 12 is located inside the guide groove 15 , and the sliding block 12 is slidably connected to the guide groove 15 , and the sliding block 12 cooperates with the guide groove 15 to limit the movement of the cooling water pipe 1 .
[0030] See also Figure 4 The movable ball 13 is movably connected to the sliding block 12, and the outer side of the sliding block 12 is in contact with the inner surface of the guide groove 15. The movement of the sliding block 12 causes the movable ball 13 to rub against the guide groove 15, and the movable ball 13 rotates, thereby reducing the moving friction of the sliding block 12, thereby ensuring the adjustment stability of the cooling water pipe 1.
[0031] See also Figure 4 The threaded rod 16 is threadedly connected to the support frame 14, and the turning handle 17 is located on the outside of the support frame 14. The threaded rod 16 is driven to rotate by the turning handle 17, and the threaded rod 16 is displaced.
[0032] See also Figure 4The movable ring 18 is located inside the connecting sleeve 11, and the movable ring 18 is movably connected to the connecting sleeve 11. The movement of the threaded rod 16 pulls the movable ring 18 to move synchronously, and cooperates with the connecting sleeve 11 to make the cooling water pipe 1 move synchronously.
[0033] When in use: connect the acetylene valve 9 to the acetylene tank, connect the oxygen valve 10 to the oxygen tank, and connect the water tank to the cooling water pipe 1 through the water inlet 8. The operator holds the welding gun 6, aligns the quenching port 4 with the surface of the workpiece, opens the acetylene valve 9 and the oxygen valve 10, and the quenching port 4 can spray flames to heat the surface of the quenched workpiece, and moves the welding gun 6 as the quenching position is adjusted. At the same time, open the water cooling valve to allow cooling water to enter the cooling water pipe 1 from the water inlet 8, and finally the quenched workpiece is cooled and quenched by the cooling water nozzle 2, and the threaded rod 16 is driven to rotate by the turning handle 17, and the threaded rod 16 is displaced. The movement of the threaded rod 16 pulls the movable ring 18 to move synchronously, and cooperates with the connecting sleeve 11 to make the cooling water pipe 1 move synchronously. The sliding block 12 cooperates with the guide groove 15 to limit the movement of the cooling water pipe 1. The movement of the sliding block 12 causes the movable ball 13 to rub against the guide groove 15, and the movable ball 13 rotates, thereby reducing the movement of the sliding block 12 Friction, thereby ensuring the adjustment stability of the cooling water pipe 1, and realizing the adjustment of the distance between the cooling port and the fire port. When quenching the mold, a trial quenching of about 200mm in length should be carried out first. According to the hardness effect of the trial quenching, the flame temperature and the travel speed are corrected. The distance between the cooling port and the fire port can be initially adjusted to 15mm. After the hardness test, if the hardness of the ignition point is higher than the middle hardness of the quenching zone, the distance between the two needs to be adjusted to 20m. When the ignition point is equal to the middle hardness, the distance between the two is no longer adjusted; when the hardness of the ignition point is lower than the hardness of the middle quenching zone, the distance between the two is adjusted to 10mm.
[0034] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.
Claims
1. A quenching tool specially used for strengthening the surface hardness of a workpiece, characterized in that: The invention comprises a welding gun (6), wherein the front end of the welding gun (6) is fixedly connected to a flame spray tube (3), and the rear end of the welding gun (6) is respectively fixedly connected to an acetylene valve (9) and an oxygen valve (10) on the upper and lower sides, a cooling water pipe (1) is arranged on one side of the flame spray tube (3), and a quenching port (4) is provided at the front end of the flame spray tube (3), a cooling water nozzle (2) is provided at the front end of the cooling water pipe (1), and a liquid flow regulating valve (7) is fixedly connected to the front side of the upper part of the cooling water pipe (1), a water inlet (8) is provided at the rear end of the cooling water pipe (1), and a spacing adjustment mechanism (5) is centrally arranged on the opposite surfaces of the cooling water pipe (1) and the flame spray tube (3), a connecting sleeve (11) is fixedly connected to one side of the lower part of the cooling water pipe (1), and a sliding block (12) is fixedly connected to the upper and lower sides of the lower part of the cooling water pipe (1), and movable balls (13) are arranged on both sides of the sliding block (12).
2. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 1, characterized in that: The spacing adjustment mechanism (5) comprises a support frame (14), wherein guide grooves (15) are provided on both upper and lower sides of the support frame (14), and a threaded rod (16) is provided through one side of the support frame (14), and the two ends of the threaded rod (16) are respectively fixedly connected to a turning handle (17) and a movable ring (18).
3. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 1, characterized in that: The acetylene valve (9) and the oxygen valve (10) are both matched with the quenching port (4), and the water inlet (8) is matched with the cooling water nozzle (2).
4. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 2, characterized in that: The sliding block (12) is located inside the guide groove (15), and the sliding block (12) is slidably connected to the guide groove (15).
5. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 2, characterized in that: The movable ball (13) is movably connected to the sliding block (12), and the outer side of the sliding block (12) is in contact with the inner surface of the guide groove (15).
6. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 2, characterized in that: The threaded rod (16) is threadedly connected to the support frame (14), and the turning handle (17) is located outside the support frame (14).
7. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 2, characterized in that: The movable ring (18) is located inside the connecting sleeve (11), and the movable ring (18) is movably connected to the connecting sleeve (11).
8. A quenching tool specially used for strengthening the surface hardness of a workpiece according to claim 1, characterized in that: An adjustment frame is fixedly connected to one side of the rear end of the cooling water pipe (1) and one side of the welding gun (6); the two adjustment frames are slidably connected, and bolts are provided through the connection between the two adjustment frames.