Variable-frequency electromagnetic heating device for small-batch forging of workpieces

Abstract

The utility model belongs to the technical field of electromagnetic heating of small-batch forged workpieces, and discloses a variable-frequency electromagnetic heating device for small-batch forged workpieces, which is characterized in that a refractory table is fixedly arranged at the central position of the upper part of a bracket; the synchronous lifting mechanisms are fixedly arranged on the left side and the right side of the fireproof table. The variable-frequency controller is fixedly arranged on the front side surface of the left side of the synchronous lifting mechanism; the sliding plates are symmetrically arranged on the inner sides of the synchronous lifting mechanisms. The fixing rings are arranged on the inner side surface of the sliding plate in parallel up and down; the electromagnetic heating cylinder is fixedly arranged at the central position of the fixing ring; the fixed flange is a ceramic flange and is fixed at the top of the electromagnetic heating cylinder through a bolt, the concentric positive electrode connector is fixedly mounted on an upper positive electrode of the electromagnetic heating cylinder, and the concentric negative electrode connector is fixedly mounted on an upper negative electrode of the electromagnetic heating cylinder. The utility model has the beneficial effects that the energy consumption for heating the forging workpiece is reduced, and the heating efficiency of the forging workpiece is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electromagnetic heating technical field of small batch forging workpiece, specifically relates to a kind of electromagnetic heating device of variable frequency small batch forging workpiece. BACKGROUND

[0002] Forging workpiece needs to be heated before stamping forging or ring rolling forging. The purpose of heating forging workpiece before forging is to improve the plasticity of forging workpiece metal, reduce deformation resistance and obtain good post-forging structure. Therefore, pre-forging heating is an indispensable important link in many forging processes. The current forging workpiece heating method is to use a large electric furnace to heat the forging workpiece, and the heating temperature is generally controlled at 600°-800°. When heating the forging workpiece, the heating furnace is filled with a whole batch of forging workpiece, and after heating is completed, the whole batch of forging workpiece is forged and processed by stamping forging or ring rolling forging.

[0003] In the prior art, for small batch (usually less than ten pieces) forging workpiece, the main technical problem of using a large electric furnace to heat the forging workpiece is that small batch forging workpiece cannot fill the entire electric furnace, and using a large electric furnace to heat small batch forging workpiece increases power consumption, causing the technical problem of increasing the cost of forging workpiece heating, and the large electric furnace has low heating efficiency. The inventor developed a variable frequency electromagnetic heating device for small batch forging workpiece based on the above-mentioned defects in the prior art, which can well solve the above-mentioned technical problems in the prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a kind of electromagnetic heating devices of variable frequency small batch forging workpiece, its structure design is simple, scientific and reasonable, can realize the rapid heating of small batch forging workpiece;The utility model can solve the technical problem that large electric furnace, small batch forging workpiece heating power consumption is high, forging workpiece heating cost increases, and also solve the problem of low heating efficiency for small batch forging workpiece.

[0005] The utility model adopts the technical scheme: a kind of electromagnetic heating device of frequency conversion small batch forging workpiece, including support, frequency converter, forging workpiece;Support is the cuboid with four support columns, refractory table is fixedly arranged in the upper center position of support, and forging workpiece is placed in the upper center of refractory table;Synchronous lifting mechanism is fixedly arranged in the left and right side positions of refractory table, and the synchronous lifting mechanism is used to make electromagnetic heating cylinder up and down position lifting movement;The frequency converter is fixedly arranged on the front side of the left side of synchronous lifting mechanism, and the frequency converter is used to provide the heating power of variable frequency to the electromagnetic heating cylinder;Sliding plate is symmetrically arranged in the inside position of synchronous lifting mechanism;Fixed ring is provided with two, and fixed ring is arranged in the inside of sliding plate Upper and lower parallel;The electromagnetic heating cylinder is fixedly arranged in the center position of fixed ring, and electromagnetic heating cylinder is used to quickly electromagnetic heating to forging workpiece;Fixed flange is ceramic flange, and fixed flange is fixed on the top of electromagnetic heating cylinder by bolt, concentric positive electrode connector is fixedly installed on the upper positive electrode of electromagnetic heating cylinder, and concentric negative electrode connector is fixed on the upper negative electrode of electromagnetic heating cylinder.

[0006] The frequency converter includes a frequency converter body, which is hollow and cuboid-shaped. An on-off switch is arranged at the lower right side of the bottom of the frequency converter body. A positive output end is fixedly arranged at the left lower part of the on-off switch. A negative output end is arranged at the left upper part of the on-off switch. A display screen is arranged on the upper front side of the frequency converter body. The frequency converter body is fixedly connected with the power supply through connecting wires.

[0007] The forging workpiece is cylindrical or annular.

[0008] The refractory table includes a refractory table body, which is cylindrical. A sealing groove is arranged on the upper circumferential edge of the refractory table body. The diameter of the sealing groove is larger than the diameter of the electromagnetic heating cylinder.

[0009] The synchronous lifting mechanism comprises a base fixedly arranged at the bottom of the hollow vertical steel and used for fixing the hollow vertical steel to the upper portion of the support; two hollow vertical steels are symmetrically arranged left and right; a sliding groove for sliding of a sliding block is formed in the inner side surface of the hollow vertical steel; a hollow horizontal steel is fixed horizontally at the upper portion of the hollow vertical steel and has a length greater than that of the hollow vertical steel; a connecting port is formed at the connection between the hollow vertical steel and the hollow horizontal steel; a spacer plate is uniformly and equidistantly arranged at the inner intermediate position of the hollow horizontal steel; an auxiliary bearing is mounted at the center of the side surface of the spacer plate; a first screw rod is arranged inside the left hollow vertical steel; the bottom of the first screw rod is mounted on a screw rod shaft seat fixedly arranged at the bottom center of the left hollow vertical steel; the upper end of the first screw rod is fixed to the bottom of the left hollow horizontal steel through the screw rod shaft seat and the connecting port; a horizontal bevel gear is fixedly mounted on the upper portion of the first screw rod; a second screw rod is arranged inside the right hollow vertical steel; the bottom of the second screw rod is fixed to the bottom center of the right hollow vertical steel through the screw rod shaft seat; the upper end of the second screw rod is fixed to the bottom of the right hollow horizontal steel through the screw rod shaft seat and the connecting port; a first synchronous shaft is horizontally mounted on the auxiliary bearing of the spacer plate; a second horizontal bevel gear is fixedly mounted on the left end of the first synchronous shaft; a third horizontal bevel gear is fixedly mounted on the right end of the first synchronous shaft; the gear face of the second horizontal bevel gear faces the left side; the gear face of the third horizontal bevel gear faces the right side; the second horizontal bevel gear on the left end of the first synchronous shaft is in meshing transmission with the right side of the horizontal bevel gear on the upper portion of the first screw rod; the third horizontal bevel gear on the right end of the first synchronous shaft is in meshing transmission with the horizontal bevel gear on the upper portion of the second screw rod; the right end of a second synchronous shaft extends to the inside of the hollow horizontal steel through the left end of the hollow horizontal steel; the left end of the second synchronous shaft extends to the left end of the hollow horizontal steel; a first horizontal bevel gear is fixedly mounted on the right end of the second synchronous shaft; the first horizontal bevel gear is in meshing transmission with the left side of the horizontal bevel gear on the upper portion of the first screw rod; a fixed plate is fixedly arranged at the upper portion of the hollow horizontal steel; a motor mounting frame is L-shaped; the motor mounting frame is fixedly arranged at the left end of the fixed plate; a stepping motor is mounted on the motor mounting frame; the power output shaft on the right end of the stepping motor is fixedly connected with the left end of the second synchronous shaft; two sliding blocks are symmetrically arranged left and right; screw holes are formed in the upper portion of the sliding blocks; the sliding blocks are respectively mounted on the first screw rod and the second screw rod through the screw holes; the sliding blocks extend to the outside of the hollow vertical steel through the sliding grooves in the inner side surface of the hollow vertical steel.

[0010] The stepping motor is fixedly connected with the control switch and the power supply through wires.

[0011] The fixed ring comprises a fixed ring body which is square-shaped; a fixed hole for fixedly mounting an electromagnetic heating cylinder is formed at the center of the fixed ring body; the diameter of the fixed hole is greater than that of the cylinder body of the electromagnetic heating cylinder; fixed bodies are symmetrically fixedly arranged at the intermediate positions of the left and right end surfaces of the fixed ring body.

[0012] The sliding plate is vertically installed on the inner side of the sliding block, and the fixing body fixedly arranged at the middle position of the left and right end faces of the fixing ring body is fixedly connected with the upper inner side of the sliding plate.

[0013] The electromagnetic heating cylinder comprises a cylinder body fixedly arranged in the fixing hole, the cylinder body is a cylinder with a closed upper portion and an open lower portion, the refractory cylinder is a cylinder with a closed upper portion and an open lower portion, the diameter of the refractory cylinder is smaller than that of the cylinder body, the refractory cylinder is fixedly installed in concentric cooperation with the cylinder body; the electromagnetic coil is a cylinder formed by winding copper wires, the positive wire end and the negative wire end of the electromagnetic coil are arranged at the upper portion of the electromagnetic coil, the positive wire end and the negative wire end of the electromagnetic coil are sleeved with insulating materials, the positive wire end and the negative wire end of the electromagnetic coil pass through the top of the refractory cylinder and the cylinder body and extend out by a certain height, the fixed flanges are respectively fixedly sleeved on the positive wire end and the negative wire end, and the top of the cylinder body is fixed by bolts; the concentric positive connector is fixedly installed on the positive wire end, and the concentric negative connector is installed on the negative wire end; the electromagnetic heating cylinder further comprises a temperature detection device arranged in the inside of the electromagnetic heating cylinder, which is used for detecting the temperature in the inside of the electromagnetic heating cylinder in real time.

[0014] The concentric positive connector is fixedly connected with the positive output end through wires, and the concentric negative connector is fixedly connected with the negative output end through wires.

[0015] The working process of the electromagnetic heating device for variable frequency small-batch forging workpieces is as follows: firstly, the on-off switch of the frequency converter is opened, the frequency converter is in a working state, the output frequency is adjusted to 1kHz-10kHz (medium frequency) or 10kHz-1MHz (high frequency) through frequency conversion according to the required heating speed of the forging workpiece, at this time, the electromagnetic coil of the electromagnetic heating cylinder generates an alternating magnetic field; then the forging workpiece is placed on the upper center position of the refractory table through the forklift, at this time, the operator starts the stepping motor of the synchronous lifting mechanism through the control switch, the clockwise rotation of the stepping motor drives the clockwise rotation of the synchronous shaft two, the clockwise rotation of the synchronous shaft two drives the clockwise rotation of the horizontal conical gear one, and the horizontal conical gear one, the horizontal conical gear two and the horizontal conical gear one are in transmission engagement through the upper horizontal conical gear of the lead screw one, so that the lead screw one is driven to rotate counterclockwise and the synchronous shaft two is driven to rotate clockwise synchronously, at the same time, the horizontal conical gear is driven to rotate clockwise and the upper horizontal conical gear of the lead screw two is in engagement transmission, so that the lead screw two is driven to rotate counterclockwise synchronously, at this time, the lead screw one and the lead screw two rotate counterclockwise synchronously through the screw shaft seat, in the process of the synchronous counterclockwise rotation of the lead screw one and the lead screw two, the sliding block along the screw hole of the lead screw one and the lead screw two is driven to move downward along the screw hole of the lead screw one and the lead screw two through the counterclockwise rotation engagement of the outer threads of the lead screw one and the lead screw two, the synchronous downward movement of the sliding block drives the downward movement of the sliding plate, the fixed ring and the electromagnetic heating cylinder, when the cylinder body of the electromagnetic heating cylinder moves and falls into the sealing groove of the refractory table, the operator turns off the stepping motor through the control switch, at this time, the forging workpiece generates electromagnetic eddy current through the electromagnetic coil alternating magnetic field and the electromagnetic eddy current of the forging workpiece, so that the purpose of high-speed electromagnetic heating of the forging workpiece is achieved; whether the forging workpiece reaches the required heating temperature is judged through the temperature detection device inside the electromagnetic heating cylinder, when the forging workpiece is heated, the electromagnetic heating cylinder is lifted through the synchronous lifting mechanism, and the heated forging workpiece is taken off from the refractory table through the forklift. When another forging workpiece needs to be heated, the above operation can be repeated.

[0016] The utility model discloses the beneficial effects of: through the setting of frequency converter, refractory table, synchronous lifting mechanism, sliding plate, fixed ring, electromagnetic heating cylinder, electromagnetic coil, make electromagnetic heating cylinder realize the action of lifting under the action of lifting of synchronous lifting mechanism, be applicable to the forging heating of small -batch forging workpiece, reduced the energy consumption of forging workpiece heating, improved the heating efficiency of forging workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model;

[0018] Figure 2 It is the bottom enlarged schematic diagram of frequency converter of the utility model;

[0019] Figure 3 It is the section view of the utility model;

[0020] Figure 4 It is the structure schematic view of the fixed ring of the utility model;

[0021] Figure 5 It is the structure schematic view of the electromagnetic coil of the utility model;

[0022] Marked in the drawing: 1, support, 2, frequency conversion controller, 21, shell, 22, on-off switch, 23, positive output end, 24, negative output end, 25, display screen, 3, forged workpiece, 4, refractory platform, 41, refractory platform body, 42, sealing groove, 5, synchronous lifting mechanism, 51, base, 52, hollow vertical steel, 53, hollow horizontal steel, 54, connecting port, 55, spacing plate, 56, auxiliary bearing, 57, screw rod one, 58, screw rod two, 59, screw rod shaft seat, 510, horizontal bevel gear, 511, horizontal bevel gear one, 512, horizontal bevel gear two, 513, horizontal bevel gear three, 514, synchronous shaft one, 515, synchronous shaft two, 516, fixed plate, 517, motor mounting frame, 518, stepper motor, 519, sliding block, 6, sliding plate, 7, fixed ring, 71, fixed ring body, 72, fixed hole, 73, fixed body, 8, electromagnetic heating cylinder, 81, cylinder body, 82, refractory cylinder, 83, electromagnetic coil, 84, positive wire end, 85, negative wire end, 9, fixed flange, 10, concentric positive joint, 11, concentric negative joint. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are further explained in detail below in combination with the drawings.

[0024] The utility model provides a kind of electromagnetic heating device of frequency conversion small batch forging workpiece:

[0025] As Figure 1 Or Figure 2 As shown, frequency conversion controller 2 is fixedly arranged on the front side of the left side of the synchronous lifting mechanism 5, and the frequency conversion controller 2 is used to provide variable frequency heating power supply for the electromagnetic heating cylinder 8;Frequency conversion controller 2 includes frequency conversion controller body 21, and the frequency conversion controller body 21 is hollow cuboid, and the on-off switch 22 is arranged at the lower right side of the bottom of the frequency conversion controller body 21, the positive output end 23 is fixedly arranged at the left lower part of the on-off switch 22, the negative output end 24 is arranged at the left upper part of the on-off switch 22, and the display screen 25 is arranged on the upper part of the front side of the frequency conversion controller body 21.

[0026] The rear part of the above-mentioned frequency conversion controller 2 is fixedly connected with three-phase power supply through wire. The above-mentioned positive output end 23 and negative output end 24 are concentric cable joints.

[0027] The variable frequency controller body 21 can provide the electromagnetic coil of the electromagnetic heating cylinder 8 with medium frequency or high frequency heating power by changing the frequency of the power supply.

[0028] As shown in Figure 1 The forged workpiece 3 is placed in the upper center of the refractory table 4, and the forged workpiece 3 is cylindrical or annular. When the forged workpiece 3 is cylindrical, a punch forging machine can be used for forging processing; when the forged workpiece 3 is annular, a ring rolling machine can be used for forging processing. The forged workpiece 3 can be placed in the upper center of the refractory table 4 by a forklift.

[0029] As shown in Figure 1 The refractory table 4 includes a refractory table body 41, which is cylindrical, and a sealing groove 42 is formed in the upper circumferential edge of the refractory table body 41. The diameter of the sealing groove 42 is greater than the diameter of the cylinder body 81 of the electromagnetic heating cylinder 8. The provision of the refractory table body 41 and the sealing groove 42 provides a platform for placing the forged workpiece 3, and the contact and cooperation of the sealing groove 42 and the cylinder body 81 can prevent heat loss in the cylinder body 81 and improve the electromagnetic heating efficiency of the forged workpiece 3.

[0030] As shown in Figure 1 The synchronous lifting mechanism 5 is fixedly arranged on the left and right sides of the refractory table 4, and is used for lifting the electromagnetic heating cylinder 8 up and down. The synchronous lifting mechanism 5 can realize the synchronous lifting of the electromagnetic heating cylinder 8, which can ensure the alternating magnetic field of the electromagnetic coil 83 to generate electromagnetic eddy current for heating the forged workpiece 3, and facilitate the placement and removal of the forged workpiece 3.

[0031] As shown in Figure 3As shown, the synchronous lifting mechanism 5 comprises a base 51 fixedly arranged at the bottom of the hollow vertical steel 52, which is used to fix the hollow vertical steel 52 at the upper part of the support 1; the hollow vertical steel 52 is arranged symmetrically on the left and right sides, and the inner side of the hollow vertical steel 52 is provided with a sliding groove for sliding of the sliding block 519; the hollow transverse steel 53 is fixed horizontally at the upper part of the hollow vertical steel 52, and the length of the hollow transverse steel 53 is greater than that of the hollow vertical steel 52; the connection between the hollow vertical steel 52 and the hollow transverse steel 53 is provided with a connecting port 54; the spacer plate 55 is arranged uniformly and equidistantly at the inner middle position of the hollow transverse steel 53, and the side center of the spacer plate 55 is provided with an auxiliary bearing 56; the lead screw one 57 is arranged inside the left hollow vertical steel 52, and the bottom of the lead screw one 57 is arranged on the lead screw shaft seat 59 fixed at the bottom center inside the left hollow vertical steel 52; the upper end of the lead screw one 57 penetrates through the connecting port 54 and is fixed to the bottom inside the left hollow transverse steel 53 through the lead screw shaft seat 59; the upper part of the lead screw one 57 is fixedly provided with the horizontal bevel gear 510; the lead screw two 58 is arranged inside the right hollow vertical steel 52, and the bottom of the lead screw two 58 is fixed to the bottom center inside the right hollow vertical steel 52 through the lead screw shaft seat 59; the upper end of the lead screw two 58 penetrates through the connecting port 54 and is fixed to the bottom inside the right hollow transverse steel 53 through the lead screw shaft seat 59; the synchronous shaft one 514 is horizontally arranged on the auxiliary bearing 56 of the spacer plate 55, and the left end of the synchronous shaft one 514 is fixedly provided with the horizontal bevel gear two 512, and the right end of the synchronous shaft one 514 is fixedly provided with the horizontal bevel gear three 513; the gear face of the horizontal bevel gear two 512 faces the left side, and the gear face of the horizontal bevel gear three 513 faces the right side; the horizontal bevel gear two 512 at the left end of the synchronous shaft one 514 is in meshing transmission with the right side of the horizontal bevel gear 510 at the upper part of the lead screw one 57, and the horizontal bevel gear three 513 at the right end of the synchronous shaft one 514 is in meshing transmission with the horizontal bevel gear 510 at the upper part of the lead screw two 58; the right end of the synchronous shaft two 515 penetrates through the left end of the hollow transverse steel 53 and extends to the inside of the hollow transverse steel 53, and the left end of the synchronous shaft two 515 extends to the left end of the hollow transverse steel 53; the right end of the synchronous shaft two 515 is fixedly provided with the horizontal bevel gear one 511, which is in meshing transmission with the left side of the horizontal bevel gear 510 at the upper part of the lead screw one 57; the fixed plate 516 is fixedly arranged at the upper part of the hollow transverse steel 53, the motor mounting frame 517 is L-shaped, the motor mounting frame 517 is fixedly arranged at the left end of the fixed plate 516, the stepping motor 518 is arranged on the motor mounting frame 517, and the right end power output shaft of the stepping motor 518 is fixedly connected with the left end of the synchronous shaft two 515; the sliding block 519 is arranged symmetrically on the left and right sides, and the upper part of the sliding block 519 is provided with a threaded hole penetrating therethrough; the sliding block 519 is respectively arranged on the lead screw one 57 and the lead screw two 58 through the threaded hole, and the sliding block 519 extends to the outside of the hollow vertical steel 52 through the sliding groove in the inner side of the hollow vertical steel 52.

[0032] The interval plate 55 is evenly and equidistantly arranged in the middle of the hollow transverse steel 53, and the side center of the interval plate 55 is provided with an auxiliary bearing 56, and the main purpose of the arrangement is: on the one hand, the synchronous shaft two 515 is fixed and supported; on the other hand, the synchronous shaft two 515 is assisted to rotate, the rotating resistance is reduced, and the screw rod one 57 and the screw rod two 58 can realize synchronous counterclockwise or clockwise rotation.

[0033] The screw rod one 57 is arranged in the hollow vertical steel 52 on the left, the bottom of the screw rod one 57 is arranged on the screw rod shaft seat 59, the screw rod shaft seat 59 is fixed on the bottom center of the hollow vertical steel 52 on the left, the upper end of the screw rod one 57 is fixed on the bottom of the hollow transverse steel 53 through the screw rod shaft seat 59, and the upper part of the screw rod one 57 is fixedly arranged with a horizontal bevel gear 510; the screw rod two 58 is arranged in the hollow vertical steel 52 on the right, the bottom of the screw rod two 58 is fixed on the bottom center of the hollow vertical steel 52 on the right through the screw rod shaft seat 59, the upper end of the screw rod two 58 is fixed on the bottom of the hollow transverse steel 53 through the screw rod shaft seat 59, the right end of the synchronous shaft one 514 is fixedly arranged with a horizontal bevel gear two 512, the right end of the synchronous shaft one 514 is fixedly arranged with a horizontal bevel gear three 513, the gear face of the horizontal bevel gear two 512 faces the left side, the gear face of the horizontal bevel gear three 513 faces the right side, the horizontal bevel gear two 512 on the left end of the synchronous shaft one 514 is meshed and driven with the right side of the horizontal bevel gear 510 on the upper part of the screw rod one 57, and the horizontal bevel gear three 513 on the right end of the synchronous shaft one 514 is meshed and driven with the horizontal bevel gear 510 on the upper part of the screw rod two 58; the right end of the synchronous shaft two 515 passes through the left end of the hollow transverse steel 53 and extends to the inside of the hollow transverse steel 53, the left end of the synchronous shaft two 515 extends to the left end of the hollow transverse steel 53, and the right end of the synchronous shaft two 515 is fixedly arranged with a horizontal bevel gear one 511, which is meshed and driven with the left side of the horizontal bevel gear 510 on the upper part of the screw rod one 57; the main purpose of the arrangement is: on the one hand, the horizontal bevel gear 510 on the upper part of the screw rod one 57, the horizontal bevel gear two 512 and the horizontal bevel gear one 511 are meshed and driven, and the horizontal bevel gear three 513 is clockwise rotated to be meshed and driven with the horizontal bevel gear 510 on the upper part of the screw rod two 58, so that the screw rod one 57 and the screw rod two 58 can realize synchronous counterclockwise or clockwise rotation, thereby realizing the synchronous lifting action of the sliding plate 6, the fixed ring 7 and the electromagnetic heating cylinder 8. On the other hand, the screw rod one 57 and the screw rod two 58 are meshed with the sliding block 519, and the lifting position of the electromagnetic heating cylinder 8 is mechanically locked.

[0034] As Figure 1 , 3As shown in FIGS. 5, the electromagnetic heating cylinder 8 comprises a cylinder body 81 fixedly arranged in the fixing hole 72, the cylinder body 81 is a cylinder with a closed upper portion and an open lower portion, a fireproof cylinder 82 is a cylinder with a closed upper portion and an open lower portion, the diameter of the fireproof cylinder 82 is smaller than that of the cylinder body 81, and the fireproof cylinder 82 is fixedly installed in concentric cooperation with the cylinder body 81; the electromagnetic coil 83 is a cylinder formed by winding copper wires, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 are arranged at the upper portion of the electromagnetic coil 83, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 are sleeved with insulating materials, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 pass through the top of the fireproof cylinder 82 and the cylinder body 81 and extend to a certain height, and the fixed flanges 9 are fixedly sleeved on the positive wire end 84 and the negative wire end 85 and fixedly connected to the top of the cylinder body 81 by bolts; the concentric positive connector 10 is fixedly installed on the positive wire end 84, and the concentric negative connector 11 is installed on the negative wire end 85; the inside of the electromagnetic heating cylinder 8 is also provided with a temperature detection device for real-time detection of the temperature inside the electromagnetic heating cylinder 8.

[0035] The cylinder body 81 is a cylinder with a closed upper portion and an open lower portion, the fireproof cylinder 82 is a cylinder with a closed upper portion and an open lower portion, the diameter of the fireproof cylinder 82 is smaller than that of the cylinder body 81, and the fireproof cylinder 82 is fixedly installed in concentric cooperation with the cylinder body 81. The main purpose of this arrangement is to use the fireproof cylinder 82 to protect the cylinder body 81 from high temperature on one hand, and to prevent heat conduction and loss when the forging workpiece 3 is heated by electromagnetism on the other hand.

[0036] The electromagnetic coil 83 is a cylinder formed by winding copper wires, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 are arranged at the upper portion of the electromagnetic coil 83, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 are sleeved with insulating materials, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 pass through the top of the fireproof cylinder 82 and the cylinder body 81 and extend to a certain height, and the fixed flanges 9 are fixedly sleeved on the positive wire end 84 and the negative wire end 85 and fixedly connected to the top of the cylinder body 81 by bolts; the concentric positive connector 10 is fixedly installed on the positive wire end 84, and the concentric negative connector 11 is installed on the negative wire end 85; the concentric positive connector 10 is fixedly connected to the positive output end 23 by wires, and the concentric negative connector 11 is fixedly connected to the negative output end 24 by wires. The main purpose of this arrangement is to adjust the output frequency of the frequency converter 2 to make it suitable for the frequency of electromagnetic heating of the forging workpiece 3, so as to generate an alternating magnetic field for electromagnetic heating in the electromagnetic coil 83.

[0037] As shown in FIGS. 5, the electromagnetic heating cylinder 8 comprises a cylinder body 81 fixedly arranged in the fixing hole 72, the cylinder body 81 is a cylinder with a closed upper portion and an open lower portion, a fireproof cylinder 82 is a cylinder with a closed upper portion and an open lower portion, the diameter of the fireproof cylinder 82 is smaller than that of the cylinder body 81, and the fireproof cylinder 82 is fixedly installed in concentric cooperation with the cylinder body 81; the electromagnetic coil 83 is a cylinder formed by winding copper wires, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 are arranged at the upper portion of the electromagnetic coil 83, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 are sleeved with insulating materials, the positive wire end 84 and the negative wire end 85 of the electromagnetic coil 83 pass through the top of the fireproof cylinder 82 and the cylinder body 81 and extend to a certain height, and the fixed flanges 9 are fixedly sleeved on the positive wire end 84 and the negative wire end 85 and fixedly connected to the top of the cylinder body 81 by bolts; the concentric positive connector 10 is fixedly installed on the positive wire end 84, and the concentric negative connector 11 is installed on the negative wire end 85; the inside of the electromagnetic heating cylinder 8 is also provided with a temperature detection device for real-time detection of the temperature inside the electromagnetic heating cylinder 8. Figures 1-5As shown, the working process of the electromagnetic heating device for variable frequency small batch forging workpieces is as follows: first, the on-off switch of the frequency converter 2 is opened, the frequency converter 2 is in a working state, the output frequency of the frequency converter 2 is adjusted to 1 kHz-10 kHz (medium frequency) or 10 kHz-1 MHz (high frequency) according to the required heating speed of the forging workpiece 3, at this time, the electromagnetic coil 83 of the electromagnetic heating cylinder 8 generates an alternating magnetic field; then the forging workpiece 3 is placed on the upper center position of the refractory table 4 by the forklift, at this time, the operator starts the stepping motor 518 of the synchronous lifting mechanism 5 through the control switch, the clockwise rotation of the stepping motor 518 drives the synchronous shaft two 515 to rotate clockwise, the clockwise rotation of the synchronous shaft two 515 drives the horizontal conical gear one 511 to rotate clockwise, and the horizontal conical gear two 512 and the horizontal conical gear one 511 are in transmission engagement through the upper horizontal conical gear 510 of the lead screw one 57 and the horizontal conical gear two 512, so that the lead screw one 57 and the synchronous shaft two 515 rotate synchronously counterclockwise, at the same time, the horizontal conical gear 513 is in meshing transmission with the upper horizontal conical gear 510 of the lead screw two 58 through the clockwise rotation of the horizontal conical gear 513, so that the lead screw two 58 rotates synchronously counterclockwise, at this time, the lead screw one 57 and the lead screw two 58 rotate synchronously counterclockwise through the synchronous lead screw shaft seat 59, in the process of synchronous counterclockwise rotation of the lead screw one 57 and the lead screw two 58, the sliding block 519 moves synchronously downward along the lead screw one 57 and the lead screw two 58 through the counterclockwise rotation meshing of the screw hole of the sliding block 519 and the external threads of the lead screw one 57 and the lead screw two 58, the synchronous downward movement of the sliding block 519 drives the sliding plate 6, the fixed ring 7 and the electromagnetic heating cylinder 8 to move downward, when the cylinder body 81 of the electromagnetic heating cylinder 8 moves and falls into the sealing groove 42 of the refractory table 4, the operator turns off the stepping motor 518 through the control switch, at this time, the electromagnetic eddy current is generated between the forging workpiece 3 and the alternating magnetic field of the electromagnetic coil 83 through the magnetic conductivity of the forging workpiece 3, so that the purpose of high-speed electromagnetic heating of the forging workpiece 3 is achieved; whether the forging workpiece 3 reaches the required heating temperature is judged through the temperature detection device inside the electromagnetic heating cylinder 8, when the forging workpiece is heated, the electromagnetic heating cylinder 8 is lifted through the synchronous lifting mechanism 5, and the heated forging workpiece 3 is taken off from the refractory table 4 through the forklift. When another forging workpiece 3 needs to be electromagnetically heated, the above-mentioned operation can be repeated.

[0038] Many modifications to the above-described embodiments will be apparent to those of ordinary skill in the art and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not to be limited to the embodiments set forth above but is to be accorded the widest scope consistent with the principles and novel features to the art disclosed.

Claims

1. A variable frequency electromagnetic heating device for small batch forging workpieces, comprising a support (1), a variable frequency controller (2), and a forging workpiece (3); the support (1) is a cuboid with four supporting columns, characterized in that: The refractory table (4) is fixedly arranged at the upper center of the support (1), and the forged workpiece (3) is placed at the upper center of the refractory table (4); the synchronous lifting mechanism (5) is fixedly arranged at the left and right sides of the refractory table (4), and is used for lifting the electromagnetic heating cylinder (8) up and down; the variable frequency controller (2) is fixedly arranged on the front side of the left side of the synchronous lifting mechanism (5), and is used for providing the electromagnetic heating cylinder (8) with a variable frequency heating power supply; the sliding plate (6) is symmetrically arranged at the inner side of the synchronous lifting mechanism (5); the fixed ring (7) is provided with two, and is arranged in parallel at the inner side of the sliding plate (6); the electromagnetic heating cylinder (8) is fixedly arranged at the center of the fixed ring (7), and is used for quickly electromagnetically heating the forged workpiece (3); the fixed flange (9) is a ceramic flange, and is fixed on the top of the electromagnetic heating cylinder (8) through bolts; the concentric positive electrode connector (10) is fixedly installed on the upper positive electrode of the electromagnetic heating cylinder (8); and the concentric negative electrode connector (11) is fixedly installed on the upper negative electrode of the electromagnetic heating cylinder (8).

2. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 1, characterized in that: The variable frequency controller (2) comprises a variable frequency controller body (21), which is a hollow cuboid, an on-off switch (22) is arranged at the bottom right side of the variable frequency controller body (21), a positive electrode output end (23) is fixedly arranged at the left lower part of the on-off switch (22), a negative electrode output end (24) is arranged at the left upper part of the on-off switch (22), and a display screen (25) is arranged on the front side of the upper part of the variable frequency controller body (21); and the variable frequency controller body (21) is fixedly connected with the power supply through connecting wires.

3. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 1, characterized in that: The refractory table (4) comprises a refractory table body (41), which is a cylinder, and a sealing groove (42) is formed in the upper circumferential edge of the refractory table body (41); the diameter of the sealing groove (42) is greater than that of the cylinder body (81) of the electromagnetic heating cylinder (8).

4. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 1, characterized in that: The synchronous lifting mechanism (5) comprises a base (51), which is fixedly arranged at the bottom of the hollow vertical steel (52) and is used for fixing the hollow vertical steel (52) to the upper part of the support (1); The hollow vertical steel (52) is provided with two hollow vertical steels (52) symmetrically left and right, the inner side of the hollow vertical steel (52) is provided with a sliding groove for sliding of the sliding block (519), the hollow transverse steel (53) is transversely fixed at the upper part of the hollow vertical steel (52), the length of the hollow transverse steel (53) is greater than the length of the hollow vertical steel (52), the connecting port (54) is arranged at the connecting position of the hollow vertical steel (52) and the hollow transverse steel (53); the spacer plate (55) is uniformly and equidistantly arranged at the inner middle position of the hollow transverse steel (53), the auxiliary bearing (56) is arranged at the side center of the spacer plate (55); the lead screw one (57) is arranged in the inside of the left hollow vertical steel (52), the bottom of the lead screw one (57) is arranged on the lead screw shaft seat (59), the lead screw shaft seat (59) is fixed at the bottom center in the left hollow vertical steel (52), the upper end of the lead screw one (57) is fixed with the hollow transverse steel (53) through the lead screw shaft seat (59) and the bottom left in the hollow transverse steel (53), the upper part of the lead screw one (57) is fixedly arranged with the horizontal bevel gear (510); the lead screw two (58) is arranged in the inside of the right hollow vertical steel (52), the bottom of the lead screw two (58) is fixed with the bottom center in the right hollow vertical steel (52) through the lead screw shaft seat (59), the upper end of the lead screw two (58) is fixed with the hollow transverse steel (53) through the lead screw shaft seat (59) and the bottom right in the hollow transverse steel (53); the synchronous shaft one (514) is transversely arranged on the auxiliary bearing (56) of the spacer plate (55), the left end of the synchronous shaft one (514) is fixedly arranged with the transverse bevel gear two (512), the right end of the synchronous shaft one (514) is fixedly arranged with the transverse bevel gear three (513), the gear face of the transverse bevel gear two (512) faces the left side, the gear face of the transverse bevel gear three (513) faces the right side, the transverse bevel gear two (512) at the left end of the synchronous shaft one (514) is meshed and driven with the right side of the horizontal bevel gear (510) at the upper part of the lead screw one (57), the transverse bevel gear three (513) at the right end of the synchronous shaft one (514) is meshed and driven with the horizontal bevel gear (510) at the upper part of the lead screw two (58); the right end of the synchronous shaft two (515) passes through the left end of the hollow transverse steel (53) and extends to the inside of the hollow transverse steel (53), the left end of the synchronous shaft two (515) extends to the left end of the hollow transverse steel (53), the right end of the synchronous shaft two (515) is fixedly arranged with the transverse bevel gear one (511), the transverse bevel gear one (511) is meshed and driven with the left side of the horizontal bevel gear (510) at the upper part of the lead screw one (57); the fixed plate (516) is fixedly arranged at the upper part of the hollow transverse steel (53), the motor mounting frame (517) is L-shaped, the motor mounting frame (517) is fixedly arranged at the left end of the fixed plate (516), the stepping motor (518) is arranged on the motor mounting frame (517), and the right end power output shaft of the stepping motor (518) is fixedly connected with the left end of the synchronous shaft two (515).The two symmetrical sliding blocks (519) are provided on the left and right, and a screw hole is formed in the upper part of the sliding block (519). The sliding block (519) is respectively matched and installed on the screw rod one (57) and the screw rod two (58) through the screw hole, and the sliding block (519) extends to the outside of the hollow vertical steel (52) through the inner side groove of the hollow vertical steel (52).

5. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 1, characterized in that: The fixed ring (7) comprises a fixed ring body (71), which is square, a fixed hole (72) for fixedly installing the electromagnetic heating cylinder (8) is formed in the center of the fixed ring body (71), and the diameter of the fixed hole (72) is greater than that of the cylinder body (81) of the electromagnetic heating cylinder (8); and fixed bodies (73) are symmetrically fixedly arranged at the intermediate positions of the left and right end faces of the fixed ring body (71).

6. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 4, characterized in that: The sliding plate (6) is vertically installed on the inner side of the sliding block (519), and the fixed bodies (73) fixedly arranged at the intermediate positions of the left and right end faces of the fixed ring body (71) are fixedly connected with the inner upper part of the sliding plate (6).

7. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 1, characterized in that: The electromagnetic heating cylinder (8) comprises a cylinder body (81) fixedly arranged in the fixing hole (72), the cylinder body (81) is a closed upper portion and an open lower portion cylindrical shape, the fireproof cylinder (82) is a closed upper portion and an open lower portion cylindrical shape, the diameter of the fireproof cylinder (82) is smaller than that of the cylinder body (81), and the fireproof cylinder (82) is fixedly installed in concentric cooperation with the cylinder body (81); the electromagnetic coil (83) is a cylindrical shape wound by copper wires, the positive wire end (84) and the negative wire end (85) of the electromagnetic coil (83) are arranged at the upper portion of the electromagnetic coil (83), the positive wire end (84) and the negative wire end (85) of the electromagnetic coil (83) are sleeved with insulating materials, the positive wire end (84) and the negative wire end (85) of the electromagnetic coil (83) pass through the top of the fireproof cylinder (82) and the cylinder body (81) and extend out by a certain height, and the fixed flange (9) is fixedly sleeved on the positive wire end (84) and the negative wire end (85) and fixedly connected to the top of the cylinder body (81) through bolts; the concentric positive electrode connector (10) is fixedly installed on the positive wire end (84), and the concentric negative electrode connector (11) is installed on the negative wire end (85); the electromagnetic heating cylinder (8) is further provided with a temperature detection device for detecting the temperature inside the electromagnetic heating cylinder (8) in real time.

8. The electromagnetic heating device for frequency conversion small-batch forging workpieces according to claim 2, characterized in that: The concentric positive electrode connector (10) is fixedly connected to the positive output end (23) through wires, and the concentric negative electrode connector (11) is fixedly connected to the negative output end (24) through wires.

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