Steel bar heat treatment machining straightening device

Abstract

The utility model discloses a straightening device for heat treatment of a steel bar, and relates to the technical field of heat treatment. The device structurally comprises a horizontal base platform plate; a first straightening machine and a second straightening machine which are coaxially straightened are fixed on the base platform plate; a medium-frequency induction heater is further installed on the base platform plate, and the axis of an induction coil of the medium-frequency induction heater and the straightening axis of the first straightening machine are collinear. According to the steel bar straightening device, double straightening processes are combined, so that bending deformation of a steel bar can be straightened more thoroughly, and the straightening precision and quality are greatly improved. The first straightening machine performs mechanical extrusion and primary straightening at normal temperature, so that a better foundation is provided for subsequent heat treatment and secondary straightening, and the defects such as breakage caused by overlarge internal stress are reduced; the long bar material subjected to thermal refining through the medium-frequency induction heater is subjected to secondary straightening at the temperature, the material plasticity is good, the external force needed by further straightening is small, residual bending deformation is effectively corrected, and new damage caused by excessive straightening is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heat treatment, especially relates to a straightening device for steel bar heat treatment processing. BACKGROUND

[0002] In the steel production process, steel bar as an important basic material is widely used in construction, machinery manufacturing, automobile manufacturing and many other fields. The quality of steel bar has a crucial influence on its subsequent performance, and the straightness of steel bar is one of the key indicators to measure its quality. However, in actual production, due to various factors such as unevenness of raw materials, limitations of rolling process and temperature gradient in the cooling process, steel bar often appears different degrees of bending deformation after rolling, which not only affects the appearance quality of steel bar, but also brings many inconveniences to subsequent processing and use.

[0003] The traditional steel bar straightening method mainly includes mechanical straightening and heat treatment straightening. Mechanical straightening usually uses a press or a straightening machine and other equipment to apply external force to the steel bar to make it plastically deform, so as to achieve the purpose of straightening. Although this method is simple and direct, it is easy to produce large stress concentration in the steel bar when it is bent and corrected at room temperature, which leads to the defects such as fracture of the steel bar in the use process, seriously affecting its mechanical properties and service life. Moreover, for some high-strength steel bar materials, the effect of mechanical straightening is often unsatisfactory, which is difficult to meet the high-precision straightness requirement.

[0004] Heat treatment straightening is to use the thermal expansion and contraction characteristics of metal materials in the heating and cooling process, by controlling the heating temperature, holding time and cooling speed and other parameters, to change the stress state inside the steel bar, so as to achieve straightening. Common heat treatment straightening methods include quenching straightening, tempering straightening, etc. Heat treatment straightening can improve the internal organization and mechanical properties of steel bar to some extent, and improve its comprehensive performance. However, single heat treatment straightening process also has certain limitations. For example, the plasticity of steel bar is good at high temperature, but if it is directly corrected by a large margin, the steel bar may appear new deformation in the cooling process, affecting the straightening effect. Moreover, the temperature control in the heat treatment process requires higher, improper operation is easy to cause the steel bar to produce overheating, overburning and other defects, reducing its mechanical properties.

[0005] In order to overcome the deficiencies of the traditional single straightening method, improve the straightening precision and comprehensive performance of the steel bar, we propose a combined straightening process combining mechanical straightening and heat treatment straightening. However, the existing combined straightening device often has problems such as complex structure, unreasonable layout, inconvenient operation, etc., which leads to unsatisfactory application effect in actual production. Therefore, it is necessary to design a steel bar heat treatment machining straightening device with simple structure, convenient operation, high straightening precision and effective combination of the advantages of mechanical straightening and heat treatment straightening, so as to meet the needs of high-quality steel bar production. Content of the utility model

[0006] The utility model discloses a steel bar heat treatment machining straightening device, and reasonable layout and cooperative work of coaxial straightening first straightening machine, second straightening machine and intermediate frequency induction heater solve the problems of low precision, easy defect and low efficiency of the existing single straightening mode.

[0007] To solve the above technical problems, the utility model is realized through the following technical schemes:

[0008] The utility model discloses a steel bar heat treatment machining straightening device, which comprises a horizontal base platform plate, a coaxial straightening first straightening machine and a coaxial straightening second straightening machine are fixed on the base platform plate, an intermediate frequency induction heater is also installed on the base platform plate, and the induction coil axis of the intermediate frequency induction heater is coaxial with the straightening axis of the first straightening machine.

[0009] As a preferred technical scheme of the utility model, a ring is fixed on the base platform plate for limiting the main body of the intermediate frequency induction heater.

[0010] As a preferred technical scheme of the utility model, the first straightening machine comprises a reduction motor with a gear on the output shaft, two parallel first support plates, the reduction motor is installed on the base platform plate, the two first support plates are vertically fixed on the base platform plate, a row of first upper straightening wheels and a row of first lower straightening wheels are rotatably installed between the two first support plates, a first gear is installed at the shaft end of each of the row of first lower straightening wheels, the reduction motor and the row of first gears are synchronously driven through chains, the two ends of the two first support plates are connected into an entity through a plurality of connecting plates, and a plurality of first rib plates are welded and fixed between the first support plates and the base platform plate.

[0011] As a preferred technical scheme of the utility model, the other shaft end of the first lower straightening wheel is provided with a fourth gear, the same side shaft end of the first upper straightening wheel is provided with the fourth gear, and the two fourth gears on the first upper straightening wheel and the first lower straightening wheel are vertically and columnarly engaged and driven.

[0012] As a preferred technical scheme of the utility model, the second straightening machine comprises a servo motor and a second support plate, the second support plate is fixed vertically on the base platform plate, a row of second upper straightening wheels and a row of second lower straightening wheels are rotatably installed on one side of the second support plate, a second gear is installed at the end of the other side of the second support plate, a column of shaft gears are rotatably installed on the second support plate, the shaft gears are staggered with the second gears, the shaft gears are in meshing transmission with the second gears, the servo motor is installed on the second support plate, a third gear is installed on the output shaft of the servo motor after penetrating through the second support plate, and the third gear is in meshing transmission with one of the second gears.

[0013] As a preferred technical scheme of the utility model, the second support plate and the base platform plate are welded and fixed with a plurality of second rib plates.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model discloses a double straightening process combination, which can correct the bending deformation of the steel bar more thoroughly, greatly improves the straightening precision and quality. The first straightening machine carries out mechanical extrusion preliminary straightening at normal temperature, provides a better basis for subsequent heat treatment and secondary straightening, and reduces the defects such as fracture caused by excessive internal stress.

[0016] 2. The utility model discloses that the steel bar is heated by the electromagnetic induction principle of the intermediate frequency induction heater, realizes rapid and uniform heat treatment, and meets the process requirements of the steel bar quenching and tempering. The long bar after quenching and tempering is straightened again, the material plasticity is good, the external force required for further straightening is small, residual bending deformation is effectively corrected, and new damage caused by excessive straightening is avoided.

[0017] 3. The utility model discloses that a plurality of processing procedures are integrated together, the transfer and waiting time of the steel bar between different equipment are reduced, continuous operation is realized, and the production efficiency is improved. The rapid heating characteristics of the intermediate frequency induction heater shorten the heat treatment time, further improve the efficiency of the whole processing flow, and are suitable for large-scale production.

[0018] 4. The utility model discloses that the base platform plate is used as a basic support component, provides a stable work platform, ensures that the relative positions of the components remain stable during the processing, the ring is used for limiting the intermediate frequency induction heater body, prevents displacement during work, ensures that the relative positions of the heating coil and the steel bar are stable, and ensures that the heating effect is consistent.

[0019] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings described in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 The figure is a structural schematic view of the straightening device for steel bar heat treatment processing.

[0022] Figure 2 The figure is a structural schematic view of another perspective of the present application.

[0023] Figure 3 The figure is a top view of the present application.

[0024] Figure 4 The figure is a front view of the present application.

[0025] In the drawings, the components represented by each reference numeral are listed as follows:

[0026] 1-base platform plate, 2-first straightening machine, 3-second straightening machine, 4-medium frequency induction heater, 11-ring, 21-reduction motor, 22-first support plate, 23-connection plate, 24-first upper straightening wheel, 25-first lower straightening wheel, 26-first gear, 27-chain, 28-fourth gear, 31-servo motor, 32-second support plate, 33-second upper straightening wheel, 34-second lower straightening wheel, 35-second gear, 36-belt shaft gear, 37-third gear. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. Specific embodiment one:

[0029] Please refer to Figures 1-4The utility model discloses a kind of steel bar heat treatment processing straightening device, including horizontal base platform plate 1.Coaxial straightening first straightening machine 2 and second straightening machine 3 are fixed on base platform plate 1.Base platform plate 1 is also installed with intermediate frequency induction heater 4, and the induction coil axis of intermediate frequency induction heater 4 is collinear with the straightening axis of first straightening machine 2.

[0030] Base platform plate 1 is used as basic support component, and provides stable work platform for the whole device.Coaxial straightening first straightening machine 2 and second straightening machine 3 are fixed on base platform plate 1, guarantee the stability and accuracy of straightening process, reduce straightening error caused by equipment vibration or displacement.

[0031] First straightening machine 2 carries out mechanical extrusion preliminary straightening to steel bar at normal temperature, intermediate frequency induction heater 4 carries out tempering treatment to long bar material, and long bar material is secondarily straightened after tempering treatment by second straightening machine 3.Intermediate frequency induction heater 4 is installed on base platform plate 1, and the induction coil axis thereof is collinear with the straightening axis of first straightening machine 2, so that steel bar can smoothly enter the heating area of intermediate frequency induction heater 4 from first straightening machine 2 during straightening process, then enter second straightening machine 3 for secondary straightening, and the whole technological process is smooth, equipment layout is compact, and loss and deformation risk of steel bar during transfer process are reduced.

[0032] First straightening machine 2 specifically includes output shaft gear reduction motor 21, two parallel first support plates 22.Gear reduction motor 21 is installed on base platform plate 1.Two first support plates 22 are vertically fixed on base platform plate 1.A row of first upper straightening wheels 24 and a row of first lower straightening wheels 25 are rotatably installed between two first support plates 22.A first gear 26 is installed at one axial end of a row of first lower straightening wheels 25.Gear reduction motor 21 and a row of first gears 26 are synchronously driven through chain 27.Two ends of two first support plates 22 are connected as a whole through a plurality of connecting plates 23.A plurality of first rib plates are welded and fixed between first support plate 22 and base platform plate 1.In order to prevent first lower straightening wheel 25 from slipping, fourth gear 28 is installed at the other axial end of first lower straightening wheel 25, fourth gear 28 is installed at the same side axial end of first upper straightening wheel 24, and two fourth gears 28 on vertical and same column first upper straightening wheel 24 and first lower straightening wheel 25 are engaged and driven.

[0033] The first straightening machine 2 mechanically extrudes the steel bar at room temperature to preliminarily straighten the steel bar, so that most of the bending deformation of the steel bar can be quickly corrected, and a relatively good basis is provided for subsequent heat treatment and secondary straightening. The straightening at room temperature can avoid directly correcting a large amount of deformation at a high temperature, and reduce defects such as breakage caused by excessive internal stress of the steel bar.

[0034] The intermediate frequency induction heater 4 performs a tempering treatment on the long bar, generates eddy current heating in the steel bar by using the principle of electromagnetic induction, and then realizes heat treatment processes such as quenching and tempering. This heating method has the advantages of fast heating speed, uniform temperature, and easy control, and can meet the process requirements of the steel bar heat treatment.

[0035] The second straightening machine 3 specifically includes a servo motor 31 and a second support plate 32. The second support plate 32 is fixed vertically on the base platform plate 1. A row of second upper straightening wheels 33 and a row of second lower straightening wheels 34 are rotatably installed on one side of the second support plate 32. The second lower straightening wheels 34 are installed at the end of the other side of the second support plate 32. A second gear 35 is installed on the second support plate 32. A row of shaft gears 36 are rotatably installed on the second support plate 32, and the shaft gears 36 are staggered with the second gears 35 and meshed with the second gears 35. The servo motor 31 is installed on the second support plate 32. A third gear 37 is installed on the output shaft of the servo motor 31 after penetrating through the second support plate 32. The third gear 37 is meshed with one of the second gears 35. In order to strengthen the stability of the second support plate 32, a plurality of second rib plates 38 are welded and fixed between the second support plate 32 and the base platform plate 1.

[0036] The long bar after the tempering treatment is straightened again with temperature. At this time, the steel bar is in a high temperature state, the plasticity of the material is good, the external force required for further straightening is small, the residual bending deformation of the steel bar can be corrected more effectively, and new damage will not be caused by excessive straightening.

[0037] The combination of the double straightening processes can more completely correct the bending deformation of the steel bar, greatly improve the straightening precision and quality, make the straightness of the steel bar more meet the processing requirements, and improve the quality stability of the product. The fast heating characteristics of the intermediate frequency induction heater 4 can shorten the heat treatment time and further improve the efficiency of the entire processing flow, which is suitable for large-scale steel bar production.

[0038] Compared with the traditional separate mechanical straightening or heat treatment straightening process, the device completes various processing procedures on one platform, reduces the dangerous factors in the operation process, and improves the safety of production.

[0039] In the description of the specification, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The preferred embodiments of the utility model disclosed above are only used for helping to explain the utility model. The preferred embodiments do not describe all the details exhaustively, and also do not limit the utility model to only the specific implementation manners described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited only by the claims and the entire scope and equivalents thereof.

Claims

1. A steel bar heat treatment processing straightening device, characterized in that: it comprises a horizontal base platform plate (1); a coaxial straightening first straightening machine (2) and a coaxial straightening second straightening machine (3) are fixed on the base platform plate (1); a medium frequency induction heater (4) is installed on the base platform plate (1), and the induction coil axis of the medium frequency induction heater (4) is coaxial with the straightening axis of the first straightening machine (2). A ring (11) is fixed on the base platform plate (1) for limiting the body of the medium frequency induction heater (4).

2. The straightening device for heat treatment of steel bars according to claim 1, characterized in that, The first straightening machine (2) comprises a gear-reducing motor (21) with a toothed output shaft, two parallel first support plates (22); the gear-reducing motor (21) is installed on the base platform plate (1); the two first support plates (22) are vertically fixed on the base platform plate (1); a row of first upper straightening wheels (24) and a row of first lower straightening wheels (25) are rotatably installed between the two first support plates (22); a first gear (26) is installed at the shaft end of each of the first lower straightening wheels (25); the gear-reducing motor (21) and the first gears (26) are synchronously driven by a chain (27); the two ends of the two first support plates (22) are connected by a plurality of connecting plates (23); a plurality of first rib plates are welded and fixed between the first support plates (22) and the base platform plate (1).

3. The straightening device for heat treatment of steel bars according to claim 1, characterized in that, The other shaft end of the first lower straightening wheel (25) is provided with a fourth gear (28), and the same side shaft end of the first upper straightening wheel (24) is provided with the fourth gear (28); the fourth gears (28) on the first upper straightening wheels (24) and the first lower straightening wheels (25) are vertically and columnarly engaged and driven.

4. The straightening device for heat treatment of steel bars according to claim 3, characterized in that, The second straightening machine (3) comprises a servo motor (31) and a second support plate (32); the second support plate (32) is vertically fixed on the base platform plate (1); a row of second upper straightening wheels (33) and a row of second lower straightening wheels (34) are rotatably installed on one side of the second support plate (32); a second gear (35) is installed at the end of the shaft of the second lower straightening wheel (34) located on the other side of the second support plate (32); a column of shaft gears (36) are rotatably installed on the second support plate (32), and the shaft gears (36) and the second gears (35) are staggered, and the shaft gears (36) and the second gears (35) are engaged and driven; the servo motor (31) is installed on the second support plate (32); a third gear (37) is installed on the output shaft of the servo motor (31) after penetrating through the second support plate (32); the third gear (37) is engaged and driven with one of the second gears (35).

5. The straightening device for heat treatment of steel bars according to claim 1, characterized in that, A plurality of second rib plates (38) are welded and fixed between the second support plate (32) and the base platform plate (1).

6. The straightening device for heat treatment of steel bars according to claim 5, characterized in that, ​

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