Rod piece upsetting device and method

Abstract

The invention discloses a rod piece upsetting device and method which are applied to the technical field of forging. Loading a flat anvil; the induction coil is used for heating the rod piece, the induction coil is located between the lower flat anvil and the upper flat anvil, the rod piece is located in the induction coil, and the ratio of the axial height of the induction coil to the diameter of the rod piece is smaller than 3; the lifting device is used for supporting the induction coil and driving the induction coil to move in the extension direction of the rod piece; the controller is connected with the upper flat anvil, the induction coil and the lifting device and used for controlling the upsetting pressure of the upper flat anvil, controlling the power of the induction coil and controlling the moving speed and the moving direction of the lifting device. According to the rod piece upsetting device provided by the invention, the problems of double-drum type, instability, longitudinal bending, folding or gravity center shift and the like of the rod piece with the ultra-large height-diameter ratio during upsetting rough machining can be avoided, and the upsetting rough machining requirement of the rod piece with the ultra-large height-diameter ratio of which the height-diameter ratio is greater than or equal to 3 is met.

Description

Technical Field

[0001] The invention relates to the technical field of forging, and in particular to a rod roughening device and method. Background Art

[0002] With the rapid development of my country's aviation, aerospace, shipbuilding and other fields, alloy forgings are used more and more, and the market volume increases year by year. Large-size forgings account for the vast majority, and higher requirements are placed on their mechanical properties and organizational properties. The roughening process is an indispensable step in the forging production process.

[0003] When the forging press performs upsetting processing on round rods, for rods with a large aspect ratio, that is, rods with an aspect ratio greater than or equal to 3, problems such as double drum, instability, longitudinal bending, folding or center of gravity shift are prone to occur during upsetting. To address this problem, the relevant technology generally adopts the method of increasing the diameter of the ingot, or using a specific upsetting mold and upsetting method. However, when some high-quality alloys with poor castability cannot be made into ingots with larger diameter specifications; the method of using molds for constrained upsetting, a set of molds basically corresponds to one round rod size, which has great limitations, high mold manufacturing costs, cumbersome steps, and long time consumption; in addition, the efficiency is low, and a large production site is occupied, which cannot solve the problem of the increasing market demand for large-size forgings, and it is difficult to ensure supply.

[0004] Therefore, how to effectively improve the processing quality and efficiency of rods with a large aspect ratio is a technical problem that technicians in this field currently need to solve. Summary of the invention

[0005] The object of the present invention is to provide a rod roughing device and method, which are used to reduce defects in roughing of rods with super-large aspect ratio and improve efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A rod roughing device, used for roughing a rod with a height-to-diameter ratio of ≥3, comprising:

[0008] A lower flat anvil, used to support the rod;

[0009] An upper anvil, used for applying pressure to the rod, the upper anvil being located above the lower anvil;

[0010] an induction coil, used for heating the rod, wherein the induction coil is located between the lower anvil and the upper anvil, the rod is located inside the induction coil, and the ratio of the axial height of the induction coil to the diameter of the rod is less than 3;

[0011] A lifting device, used for supporting the induction coil and driving the induction coil to move along the extension direction of the rod;

[0012] A controller is connected to the upper anvil, the induction coil and the lifting device, and is used to control the roughening pressure of the upper anvil, control the power of the induction coil, and control the moving speed and moving direction of the lifting device.

[0013] On the other hand, the lifting device includes a power component and a bracket installed on the power component, the induction coil is located on the bracket, and the power component drives the bracket to rise and fall, thereby driving the induction coil to rise and fall.

[0014] On the other hand, the bracket includes two groups of longitudinal connecting rods and transverse connecting rods, and a group of transverse connecting rods are connected to each side of the induction coil. The transverse connecting rods are installed on the longitudinal connecting rods, and the power component is connected to the longitudinal connecting rods to drive the longitudinal connecting rods to rise and fall.

[0015] On the other hand, it also includes an infrared thermometer for obtaining the real-time temperature of the position on the rod corresponding to the induction coil; the controller is connected to the infrared thermometer, and the controller is also used to control the action of the lifting device when the real-time temperature is ≥ the roughening temperature.

[0016] On the other hand, it also includes a position detection component, which is installed on the induction coil and is used to obtain the position of the induction coil;

[0017] The controller is connected to the position detection component, and is further used to obtain detection information of the position detection component, and control the power component to drive in reverse when the induction coil is in contact with the upper flat anvil.

[0018] On the other hand, the position detection component is an in-place sensor, and the in-place sensor is installed on a side of the induction coil close to the upper anvil.

[0019] On the other hand, the induction coil is cylindrical, the rod is a round rod, and the diameter of the induction coil is 1.5-3 times the diameter of the rod.

[0020] A rod roughening method comprises the following steps:

[0021] Step S1: controlling the induction coil to move to the bottom of the rod and energizing the induction coil;

[0022] Step S2: controlling the upper anvil to move toward the lower anvil, and controlling the upper anvil to apply a preset pressure to the rod;

[0023] Step S3: obtaining the real-time temperature of the position on the rod corresponding to the induction coil, and when the real-time temperature is greater than or equal to the upsetting temperature, controlling the induction coil to move from the bottom to the top of the rod at a target speed;

[0024] Step S4: acquiring the position of the induction coil, and controlling the induction coil to move in the reverse direction when the induction coil contacts the upper anvil.

[0025] On the other hand, the step S3 further comprises:

[0026] The rod is a round rod. When the material of the round rod is a steel alloy: the inner diameter of the induction coil is 1.5 to 2.8 times the diameter of the round rod, the target speed is 20 to 30 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the round rod;

[0027] When the round rod is made of copper alloy: the inner diameter of the induction coil is 1.4 to 2.5 times the diameter of the round rod, the target speed is 15 to 30 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod;

[0028] When the round rod is made of aluminum alloy: the inner diameter of the induction coil is 1.4 to 2.0 times the diameter of the round rod, the target speed is 5 to 10 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod.

[0029] On the other hand, when the material is a steel alloy, the roughening temperature is 1000-1200°C; when the material is a copper alloy, the roughening temperature is 700-800°C; when the material is an aluminum alloy, the roughening temperature is 350-450°C.

[0030] The rod roughing device provided by the present invention is used for roughing a rod with a height-to-diameter ratio of ≥3, and includes: a lower anvil for supporting the rod; an upper anvil for applying pressure to the rod, the upper anvil being located above the lower anvil; an induction coil for heating the rod, the induction coil being located between the lower anvil and the upper anvil, the rod being located inside the induction coil, and the ratio of the axial height of the induction coil to the diameter of the rod being <3; a lifting device for supporting the induction coil and driving the induction coil to move along the extension direction of the rod; and a controller connected to the upper anvil, the induction coil and the lifting device, and used for controlling the roughing pressure of the upper anvil, controlling the power of the induction coil, and controlling the moving speed and moving direction of the lifting device. The rod upsetting device provided by the present invention utilizes the settings of the induction coil and the lifting device, and utilizes the controller to control the lifting device, so as to drive the induction coil to move along the extension direction of the rod, thereby realizing segmented upsetting of the rod. Since the heating of the rod by the induction coil is local, the rod is partially upset under the action of the lower anvil and the upper anvil, and as the induction coil moves, various parts of the rod are gradually upset, and there is no need to make an upsetting mold, so the cost is reduced and the efficiency is improved. Since the ratio of the axial height of the induction coil to the diameter of the rod is less than 3, only the position on the rod corresponding to the induction coil is upset, so as to avoid the problems of double drum, instability, longitudinal bending, folding or center of gravity shift that occur in the upsetting of the rod with an ultra-large aspect ratio, and can meet the upsetting processing requirements of the rod with an ultra-large aspect ratio whose height and diameter ratio is greater than or equal to 3, and is suitable for the scenes with high requirements on the performance of aluminum alloy rods in the fields of aerospace and the like.

[0031] The rod upsetting method provided by the present invention comprises the following steps: step S1: controlling the induction coil to move to the bottom of the rod and energizing the induction coil; step S2: controlling the upper anvil to move toward the lower anvil, and controlling the upper anvil to apply a preset pressure to the rod; step S3: obtaining the real-time temperature of the position on the rod corresponding to the induction coil, and when the real-time temperature is ≥ the upsetting temperature, controlling the induction coil to move from the bottom to the top of the rod at a target speed; step S4: obtaining the position of the induction coil, and when the induction coil contacts the upper anvil, controlling the induction coil to move in the opposite direction. The rod upsetting method provided by the present invention utilizes the induction coil to heat a local position of the rod, and by adjusting the position of the induction coil, the heating position of the induction coil is changed, and a preset pressure is applied to the rod by the upper flat anvil. When the preset pressure remains unchanged, when the real-time temperature of the position on the rod corresponding to the induction coil is greater than or equal to the upsetting temperature, the position on the rod corresponding to the induction coil will be deformed to achieve the purpose of upsetting. Then, by moving the induction coil, continuous processing upsetting of the rod is achieved, avoiding the use of upsetting molds, reducing costs and improving efficiency. At the same time, by obtaining the position of the induction coil and controlling the induction coil to move in the opposite direction when the induction coil contacts the upper flat anvil, the upper flat anvil avoids the influence of the position of the induction coil, thereby ensuring smooth upsetting of the rod at various positions, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic structural diagram of a specific implementation of the rod roughening device provided by the present invention;

[0034] Figure 2 for Figure 1 The schematic diagram of the structure of the rod roughening device when the induction coil is located in the middle of the rod body;

[0035] Figure 3 for Figure 1 The schematic diagram of the structure of the rod roughening device when the induction coil is located at the top of the rod body;

[0036] Figure 4 The present invention is a flow chart of the rod roughening method provided by the present invention.

[0037] Reference numerals:

[0038] Rod 01;

[0039] The lower anvil 10 ; the upper anvil 20 ; the induction coil 30 ; the lifting device 40 ; the power component 41 ; the bracket 42 ; the longitudinal connecting rod 421 ; the transverse connecting rod 422 ; and the position detection component 50 . DETAILED DESCRIPTION

[0040] The core of the present invention is to provide a rod roughing device and method, which can significantly improve the roughing processing quality and efficiency of rods with ultra-large aspect ratio and reduce costs.

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] Please refer to Figures 1 to 3 , Figure 1 A schematic structural diagram of a specific implementation of the rod roughening device provided by the present invention; Figure 2 for Figure 1 The schematic diagram of the structure of the rod roughening device when the induction coil is located in the middle of the rod body; Figure 3 for Figure 1 The schematic diagram of the structure of the rod roughening device is shown when the induction coil is located at the top of the rod body.

[0043] In this embodiment, the rod 01 roughing device is used for roughing a rod 01 with an extra-large aspect ratio, wherein the rod 01 with an extra-large aspect ratio refers to a rod 01 with a height / diameter of ≥3;

[0044] The rod 01 roughening device comprises:

[0045] A lower flat anvil 10, used to support the rod 01;

[0046] An upper anvil 20 is used to apply pressure to the rod 01, and the upper anvil 20 is located above the lower anvil 10;

[0047] The induction coil 30 is used to heat the rod 01. The induction coil 30 is located between the lower anvil 10 and the upper anvil 20. The rod 01 is located inside the induction coil 30. The ratio of the axial height of the induction coil 30 to the diameter of the rod 01 is less than 3. In order to ensure the gradual transition roughening effect of the rod 01 and reduce the problems of double drum type, instability, longitudinal bending, folding or center of gravity shift, the ratio of the axial height of the induction coil 30 to the diameter of the rod 01 is preferably less than 2; that is, the axial height of the induction coil 30 is significantly smaller than the length of the rod 01.

[0048] The lifting device 40 is used to support the induction coil 30 and drive the induction coil 30 to move along the extension direction of the rod 01;

[0049] The controller is connected to the upper anvil 20 , the induction coil 30 and the lifting device 40 , and is used to control the upsetting pressure of the upper anvil 20 , the power of the induction coil 30 , and the moving speed and direction of the lifting device 40 .

[0050] Specifically, the cross section of the rod 01 can be circular, square or elliptical, and is usually used to process circular rods 01; when the cross section of the rod 01 is square, the diameter of the rod 01 refers to the diameter of the inscribed circle; when the cross section of the rod 01 is elliptical, the diameter of the rod 01 refers to the length of the minor axis of the ellipse; the induction coil 30 is used to rapidly heat the local area of ​​the rod 01 from bottom to top, so that the heated metal area of ​​the rod 01 is softened, and the upper limit of the heating speed is not greater than the heating speed at which cracks occur in the metal of the rod 01; and The height-to-diameter ratio of the heated metal area on the rod 01 corresponding to the induction coil 30 is less than 3, and then it is roughened. After the roughening of the heated metal area is completed, the next area is gradually transferred to be heated and roughened, and finally the roughening of the entire length of the rod 01 is completed; the induction coil 30 is moved from bottom to top because after the lower part of the rod 01 is roughened, the entire rod 01 will not be unstable on the lower anvil 10 due to the removal of the upper anvil 20, which improves reliability. Of course, if conditions permit, the induction coil 30 can also be moved from top to bottom. Further, the controller can control the roughening pressure of the upper anvil 20, the power of the induction coil 30, and the moving speed and direction of the lifting device 40 according to the roughening process of the rod 01, so as to meet the roughening process requirements and improve the processing accuracy; regarding the setting principle of the roughening process, the roughening process of the rod 01 with a height-to-diameter ratio of less than 3 in the relevant technology can be referred to.

[0051] The rod 01 upsetting device provided by the present invention utilizes the arrangement of the induction coil 30 and the lifting device 40, and utilizes the controller to control the lifting device 40, so as to drive the induction coil 30 to move along the extension direction of the rod 01, thereby realizing the segmented upsetting of the rod 01. Since the heating of the rod 01 by the induction coil 30 is local, the rod 01 is partially upset under the action of the lower flat anvil 10 and the upper flat anvil 20. As the induction coil 30 moves, various parts of the rod 01 are gradually upset, and there is no need to make The roughing mold is used to reduce costs and improve efficiency. Since the ratio of the axial height of the induction coil 30 to the diameter of the rod 01 is less than 3, only the position on the rod 01 corresponding to the induction coil 30 is roughened, avoiding problems such as double drum, instability, longitudinal bending, folding or center of gravity shift that occur when the ultra-large aspect ratio rod 01 is roughened. It can meet the roughing processing requirements of the ultra-large aspect ratio rod 01 with a height and diameter ratio greater than or equal to 3, and is suitable for scenes in the aerospace field and other fields that have high requirements on the performance of the aluminum alloy rod 01.

[0052] In some embodiments, the lifting device 40 includes a power component 41 and a bracket 42 installed on the power component 41. The induction coil 30 is located on the bracket 42. The power component 41 drives the bracket 42 to rise and fall, thereby driving the induction coil 30 to rise and fall. Specifically, the power component 41 can be a motor, a cylinder or other component, and any method that can push the bracket 42 to move can be used, or a manual method can be used, that is, the power component 41 is a hand crank, which is connected to the bracket 42, and the lifting of the bracket 42 is manually controlled, thereby driving the induction coil 30 to rise and fall.

[0053] In some embodiments, the power component 41 includes a motor and a hand-cranked component, and either the motor or the hand-cranked component drives the longitudinal connecting rod 421; that is, the lifting and lowering of the bracket 42 can be carried out in both electric and manual ways. For example, when the induction coil 30 moves to the two ends of the rod 01 and approaches the upper anvil 20 or the lower anvil 10, it can be switched to manual mode to reduce the risk of collision between the induction coil 30 and the upper anvil 20 or the lower anvil 10. Of course, all motor control can also be adopted to reduce interference from human factors.

[0054] In some embodiments, the bracket 42 includes two groups of longitudinal connecting rods 421 and transverse connecting rods 422. The longitudinal connecting rods 421 and the transverse connecting rods 422 can be perpendicular to each other. A group of transverse connecting rods 422 are connected to each side of the induction coil 30. The transverse connecting rods 422 are installed on the longitudinal connecting rods 421. The power component 41 is connected to the longitudinal connecting rods 421 to drive the longitudinal connecting rods 421 to rise and fall, thereby driving the transverse connecting rods 422 to rise and fall, and then driving the induction coil 30 to rise and fall; through the arrangement of the longitudinal connecting rods 421 and the transverse connecting rods 422, the arrangement of the induction coil 30 can be facilitated to avoid interference with the rod member 01.

[0055] In some embodiments, the bracket 42 is detachably connected to the induction coil 30, and the induction coil 30 of different heights and diameters can be selected as needed. The induction coil 30 is detachably connected to the bracket 42, which is convenient for disassembly and assembly, thereby meeting the roughening requirements of rods 01 of different sizes or types, thereby improving the scope of application.

[0056] In some embodiments, an infrared thermometer is further included to obtain the real-time temperature of the position on the rod 01 corresponding to the induction coil 30; a controller is connected to the infrared thermometer, and the controller is also used to control the movement of the lifting device 40 when the real-time temperature is ≥ the roughening temperature; the infrared thermometer can play a detection role and provide feedback on the movement of the induction coil 30. Of course, it is also possible to determine whether the induction coil 30 needs to be moved based on the heating time of the induction coil 30; it is preferred to use an infrared thermometer, which is more accurate.

[0057] In some embodiments, a position detection component 50 is further included. The position detection component 50 is installed on the induction coil 30 to obtain the position of the induction coil 30. The position detection component 50 can be a position sensor installed at the axial upper end of the induction coil 30. Of course, the position detection component 50 can also be set at the axial lower end of the induction coil 30 to detect whether the induction coil 30 is close to the upper anvil 20 or the lower anvil 10.

[0058] The controller is connected to the position detection component 50, and the controller is also used to obtain detection information of the position detection component 50, and control the power component 41 to drive in reverse when the induction coil 30 is in contact with the upper anvil 20; because when the induction coil 30 moves to the upper end of the rod 01, the upper anvil 20 moves downward and interferes with the induction coil 30. Therefore, in order to avoid interference between the upper anvil 20 and the induction coil 30, when the position detection component 50 obtains that the induction coil 30 is in contact with the upper anvil 20, the power component 41 can be controlled to drive the induction coil 30 to move downward; at this time, it is necessary to synchronously perform temperature detection on the position corresponding to the induction coil 30 on the rod 01, and when the temperature of the position corresponding to the induction coil 30 on the rod 01 is ≥ the roughening temperature, the induction coil 30 is controlled to be powered off, and there is no need to continue heating the rod 01.

[0059] In some embodiments, the position detection component 50 is an in-position sensor, which is installed on the side of the induction coil 30 close to the upper anvil 20; or, the position detection component 50 is a laser sensor, which is installed on the side of the induction coil 30 close to the rod body, and the position of the induction coil 30 is determined by manually observing the position of the laser point.

[0060] In some embodiments, the induction coil 30 is cylindrical, the rod 01 is a round rod, and the diameter of the induction coil 30 is 1.5-3 times the diameter of the rod 01; the diameter of the induction coil 30 should refer to the power of the induction coil 30. The greater the power of the induction coil 30, the larger the diameter of the induction coil 30 can be; the smaller the power of the induction coil 30, the smaller the diameter of the induction coil 30 can be.

[0061] In addition to the above-mentioned rod 01 roughening device, the present invention also provides a rod 01 roughening method, which can use the above-mentioned rod 01 roughening device or other devices that can perform the rod 01 roughening method. Figure 4 , Figure 4 This is a flow chart of the method for roughening the rod 01 provided by the present invention.

[0062] The rod 01 roughening method comprises the following steps:

[0063] Step S1: Control the induction coil 30 to move to the bottom of the rod 01 and energize the induction coil 30;

[0064] Step S2: Control the upper anvil 20 to move toward the lower anvil 10, and control the upper anvil 20 to apply a preset pressure to the rod 01;

[0065] Step S3: obtaining the real-time temperature of the position on the rod 01 corresponding to the induction coil 30, and when the real-time temperature is greater than or equal to the upsetting temperature, controlling the induction coil 30 to move from the bottom to the top of the rod 01 at a target speed;

[0066] Step S4: acquiring the position of the induction coil 30 , and controlling the induction coil 30 to move in the reverse direction when the induction coil 30 contacts the upper anvil 20 .

[0067] Specifically, the upper anvil 20 and the lower anvil 10 are fixed on the forging machine, the rod 01 is placed between the upper anvil 20 and the lower anvil 10 , and the upper anvil 20 applies a preset pressure on the upper end of the rod 01 . The method for roughing the rod 01 utilizes an induction coil 30 to heat a local position of the rod 01, and by adjusting the position of the induction coil 30, the heating position of the induction coil 30 is changed, and a preset pressure is applied to the rod 01 by the upper flat anvil 20. When the preset pressure remains unchanged, when the real-time temperature of the position on the rod 01 corresponding to the induction coil 30 is greater than or equal to the roughing temperature, the position on the rod 01 corresponding to the induction coil 30 will be deformed to achieve the purpose of roughing; then, by moving the induction coil 30, continuous roughing of the rod 01 is achieved, avoiding the use of roughing molds, reducing costs and improving efficiency; at the same time, by obtaining the position of the induction coil 30 and controlling the induction coil 30 to move in the opposite direction when the induction coil 30 contacts the upper flat anvil 20, the upper flat anvil 20 is avoided from affecting the position of the induction coil 30, ensuring smooth roughing processing of the rod 01 at various positions, and high reliability.

[0068] In some implementations, step S3 further includes:

[0069] The rod 01 is a round rod. When the material of the round rod is a steel alloy: the inner diameter of the induction coil 30 is 1.5 to 2.8 times the diameter of the round rod, the target speed is 20 to 30 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the round rod;

[0070] When the round rod is made of copper alloy: the inner diameter of the induction coil 30 is 1.4 to 2.5 times the diameter of the round rod, the target speed is 15 to 30 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod 01;

[0071] When the round rod is made of aluminum alloy: the inner diameter of the induction coil 30 is 1.4 to 2.0 times the diameter of the round rod, the target speed is 5 to 10 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod 01.

[0072] Specifically, in a specific embodiment, when the material of the round rod is a steel alloy: the inner diameter of the induction coil 30 is 1.5 to 2.8 times the diameter of the round rod, and the specific size should refer to the power of the induction coil 30. The larger the power, the larger the diameter of the induction coil 30. The target speed is 20 to 30 cm / min, which is affected by the power of the induction coil 30. The preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod 01, and the deformation temperature is 1100°C ± 50°C.

[0073] When the round rod is copper alloy: the inner diameter of the induction coil 30 is 1.4 to 2.5 times the diameter of the round rod. The specific size should refer to the power of the induction coil 30. The larger the power, the larger the diameter of the induction coil 30. The target speed is 15 to 30 cm / min. This parameter is affected by the power of the induction coil 30. The preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod 01. The deformation temperature is 850°C ± 50°C.

[0074] When the round rod is made of aluminum alloy: the inner diameter of the induction coil 30 is 1.4 to 2.0 times the diameter of the round rod. The specific size should refer to the power of the induction coil 30. The larger the power, the larger the diameter of the induction coil 30. The target speed is 5 to 10 cm / min. This parameter is affected by the power of the induction coil 30. The preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod 01. The deformation temperature is 420°C ± 50°C.

[0075] Of course, the target speed corresponding to round rods of different materials is mainly affected by factors such as the heating power of the induction coil 30, the material deformation speed, and the height of the induction coil 30. The above data is for reference only and can be set according to actual processing requirements and is not limited to the method given in this embodiment.

[0076] In some embodiments, when it is a steel alloy, the roughening temperature is 1000-1200°C; when it is a copper alloy, the roughening temperature is 700-800°C; when it is an aluminum alloy, the roughening temperature is 350-450°C; the metal of the rod 01 has good plasticity within the roughening temperature range, that is, within the deformation temperature range, and is not prone to cracks.

[0077] In some embodiments, the heating rates of rods 01 made of different metal materials are different. Aluminum alloys and copper alloys are smaller than steel or high-temperature alloys. The maximum heating rate of steel or high-temperature alloys is approximately 400°C / min. The maximum heating rate of aluminum alloys can be selected to be no greater than 100°C / min. If the heating rate of rod 01 is too low, it will not only affect the efficiency, but also cause the metal temperature of rod 01 outside the heating area of ​​induction coil 30 to rise due to metal heat transfer, resulting in uncontrollable deformation or double drum phenomenon.

[0078] In some embodiments, during the process of heating and softening the rod 01, for different metals, if the deformation resistance is reduced to 10%~20% of the strength at room temperature, it can be considered that the heating and softening of the rod 01 has met the requirements. Of course, specific tests on different metals can be used to accurately obtain the data, and this data can be ignored in actual operation. During operation, as long as a certain pressure is applied to the upper anvil 20, the metal temperature of the heating section will automatically be roughened after reaching the deformation condition. After the roughening is completed, the coil slowly moves upward to heat and roughen the lower section.

[0079] In some embodiments, when a preset pressure is applied to the upper anvil 20, the preset pressure is determined according to the deformation resistance and diameter of different materials at deformation temperatures. The metal at the position corresponding to the induction coil 30 on the rod 01 is heated to the upsetting temperature and automatically upset. When the diameter reaches -50 mm to -80 mm of the inner diameter of the induction coil 30, the coil is slowly moved upward to perform the next stage of heating and upsetting. This arrangement is to avoid the rod 01 having an upsetting diameter that is too small, resulting in low efficiency, and at the same time to avoid the rod 01 having an upsetting diameter that is too large, close to the inner diameter of the induction coil 30, which may damage the induction coil 30.

[0080] In some embodiments, the target speed is 20-30 cm / min, and the target speed is affected by the power of the induction coil 30; when the power of the induction coil 30 is large, the target speed can be appropriately increased, and when the power of the induction coil 30 is small, the target speed can be appropriately reduced.

[0081] In some embodiments, the preset pressure is ≤ the deformation resistance of the rod 01 material at the deformation temperature × the cross-sectional area of ​​the rod 01, so as to ensure the roughening quality of the rod 01 and reduce problems such as double drum, instability, longitudinal bending, folding or center of gravity shift caused by excessive preset pressure.

[0082] In a specific embodiment, when preparing for upsetting, the round rod is first placed vertically on the lower flat anvil 10, and the induction coil 30 is encircled around the round rod, not close to it, and is located at the lower end of the round rod; after the upsetting work is ready, the induction coil 30 is located at the lowest point of the round rod; then the induction coil 30 is energized to rapidly heat up the metal round rod; the round rod partially reaches the upsetting temperature, and the pressure applied by the flat anvil 20 on the forging machine to upsetting the round rod reaches a preset pressure; because the heated area will soften at this time, the metal fluidity increases; the strength of the unheated area is still relatively high, and the metal does not deform; at this time, the heated area is easily upset, while the unheated area will not be upset; because the height-to-diameter ratio of the heated metal area is less than 3, the deformed metal will not produce problems such as double drum, instability, longitudinal bending, folding or center of gravity shift; after upsetting, the diameter of the deformed area becomes larger and the length becomes shorter.

[0083] Further, the forging machine applies force downward, and the upper anvil 20 continues to press downward slowly; the position of the induction coil 30 moves slowly upward, and while moving, the round rod is quickly heated; because the induction coil 30 heats up quickly, as the induction coil 30 moves upward, the places covered by the induction coil 30 will reach the process upsetting temperature, the metal in the heated area will soften, and when the temperature of the area heated by the induction coil 30 reaches the highest, the metal deformation resistance is the lowest at this time, and this area is most susceptible to deformation at this time; and because the forging machine continues to apply force, there will always be a downward force F, and the heated area can quickly deform to the deformation limit under the action of the force F; and as the induction coil 30 moves upward, the part that has been deformed in place by the forging press will exchange with the ambient temperature because there is no induction coil 30 to heat it, the temperature will drop, and the deformation resistance will increase. Because the deformation degree has reached the limit under the same pressure, it will not be deformed in the subsequent continuous upsetting; then repeat this step, so that the whole round rod is gradually upset until the upsetting of the round rod is completed.

[0084] According to the ratio of height to diameter of the round bar, the following three steps can be repeated to complete the upsetting of the round bar:

[0085] The induction coil 30 heats the round rod, and the forging press presses upward to give a constant force F to deform the heated area. Then the induction coil 30 gradually moves upward vertically, and the round rod area that is rapidly heated begins to gradually deform under the force F given by the hydraulic press. The roughening of this deformed area complies with the roughening principle, and the height-to-diameter ratio is not greater than 3, so there will be no problems such as double drum shape, instability, longitudinal bending, folding or center of gravity shift; the roughening is gradually performed until the full length of the round rod is roughened.

[0086] Principle of the method: The method of rapidly heating the induction coil 30 is used to heat the round rod locally for roughening. The area of ​​the round rod that is not heated has a large deformation resistance. During roughening, the cross-section of the heated area and the cross-section of the non-heated area are both subjected to the force F of the forging machine. The forces are the same, and the heated area is deformed and roughened first. At this time, the height-to-diameter ratio of the heated area is less than 3, which conforms to the conventional roughening principle and can be roughened normally. As the induction coil 30 gradually moves upward, the heating area changes accordingly. The heated area has reached the deformation limit under the force F, so it will not deform subsequently.

[0087] The rod 01 roughing device and method provided by the present invention solves the problems of double drum shape, instability, longitudinal bending, folding or center of gravity shift of the round rod when the ratio of height to diameter exceeds 3; improves production efficiency, reduces production costs, shortens production cycle, and improves market supply capacity; and is suitable for roughing processing of all metal round rods.

[0088] The above is a detailed introduction to the rod roughening device and method provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A rod roughening device for roughening a rod (01) with a height-to-diameter ratio ≥ 3, characterized in that: include: A lower flat anvil (10) for supporting the rod (01); An upper anvil (20) for applying pressure to the rod (01), the upper anvil (20) being located above the lower anvil (10); an induction coil (30) for heating the rod (01), the induction coil (30) being located between the lower flat anvil (10) and the upper flat anvil (20), the rod (01) being located inside the induction coil (30), and the ratio of the axial height of the induction coil (30) to the diameter of the rod (01) being less than 3; A lifting device (40) used for supporting the induction coil (30) and driving the induction coil (30) to move along the extension direction of the rod (01); A controller is connected to the upper anvil (20), the induction coil (30) and the lifting device (40), and is used to control the roughening pressure of the upper anvil (20), control the power of the induction coil (30), and control the moving speed and moving direction of the lifting device (40).

2. The rod roughening device according to claim 1, characterized in that: The lifting device (40) comprises a power component (41) and a bracket (42) mounted on the power component (41); the induction coil (30) is located on the bracket (42); the power component (41) drives the bracket (42) to rise and fall, thereby driving the induction coil (30) to rise and fall.

3. The rod roughening device according to claim 2, characterized in that: The bracket (42) comprises two groups of longitudinal connecting rods (421) and transverse connecting rods (422); one group of transverse connecting rods (422) is connected to each side of the induction coil (30); the transverse connecting rods (422) are mounted on the longitudinal connecting rods (421); and the power component (41) is connected to the longitudinal connecting rods (421) to drive the longitudinal connecting rods (421) to rise and fall.

4. The rod roughening device according to claim 1, characterized in that: It also includes an infrared thermometer for obtaining the real-time temperature of a position on the rod (01) corresponding to the induction coil (30); the controller is connected to the infrared thermometer, and the controller is further used to control the lifting device (40) to operate when the real-time temperature is greater than or equal to the roughening temperature.

5. The rod roughening device according to any one of claims 1 to 4, characterized in that: It also includes a position detection component (50), wherein the position detection component (50) is mounted on the induction coil (30) and is used to obtain the position of the induction coil (30); The controller is connected to the position detection component (50), and is further used to obtain detection information of the position detection component (50), and to control the power component (41) to drive in the reverse direction when the induction coil (30) is in contact with the upper flat anvil (20).

6. The rod roughening device according to claim 5, characterized in that: The position detection component (50) is an in-place sensor, and the in-place sensor is installed on a side of the induction coil (30) close to the upper anvil (20).

7. The rod roughening device according to any one of claims 1 to 4, characterized in that: The induction coil (30) is cylindrical, the rod (01) is a round rod, and the diameter of the induction coil (30) is 1.5 to 3 times the diameter of the rod (01).

8. A rod roughening method, using the rod roughening device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1: controlling the induction coil (30) to move to the bottom of the rod (01), and energizing the induction coil (30); Step S2: controlling the upper anvil (20) to move in the direction of the lower anvil (10), and controlling the upper anvil (20) to apply a preset pressure to the rod (01); Step S3: obtaining a real-time temperature of a position on the rod (01) corresponding to the induction coil (30), and when the real-time temperature is greater than or equal to the upsetting temperature, controlling the induction coil (30) to move from the bottom to the top of the rod (01) at a target speed; Step S4: obtaining the position of the induction coil (30), and controlling the induction coil (30) to move in the reverse direction when the induction coil (30) contacts the upper anvil (20).

9. The rod roughening method according to claim 8, characterized in that: The step S3 further comprises: The rod (01) is a round rod. When the material of the round rod is a steel alloy: the inner diameter of the induction coil (30) is 1.5 to 2.8 times the diameter of the round rod, the target speed is 20 to 30 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the round rod; When the round rod is made of copper alloy: the inner diameter of the induction coil (30) is 1.4 to 2.5 times the diameter of the round rod, the target speed is 15 to 30 cm / min; the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod (01); When the round rod is made of aluminum alloy: the inner diameter of the induction coil (30) is 1.4 to 2.0 times the diameter of the round rod, the target speed is 5 to 10 cm / min; and the preset pressure is ≤ the deformation resistance of the material at the deformation temperature × the cross-sectional area of ​​the rod (01).

10. The rod roughening method according to claim 8, characterized in that: When the material is a steel alloy, the roughening temperature is 1000-1200°C; when the material is a copper alloy, the roughening temperature is 700-800°C; when the material is an aluminum alloy, the roughening temperature is 350-450°C.

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