Induction heating device for crankshaft

Abstract

The utility model discloses an induction heating device for a crankshaft, and relates to the technical field of induction heating of complex metal parts. The induction heating device comprises a base, a three-jaw chuck, a linear motor, a first electric push rod, a second electric push rod and an induction coil, firstly, a crankshaft is installed in the three-jaw chuck, then the crank is shaken to enable the lead screw to drive the jacking block to jack the crankshaft, then the induction coil is started through the controller for heating, and the controller controls the linear motor, the first electric push rod and the second electric push rod to execute different formula motions according to the specification and size of the crankshaft. And the center of the induction coil is always overlapped with the center of each section of the crankshaft under the linkage of the movement mechanism, so that the crankshaft is uniformly heated. The positions of the induction coil in the horizontal direction and the vertical direction are adjusted through the linear motor, the first electric push rod and the second electric push rod, so that the center of the induction coil coincides with the center of each section of the crankshaft, and the crankshaft is heated more uniformly.

Description

TECHNICAL FIELD

[0001] The utility model relates to complex metal parts induction heating technical field, specifically for a kind of induction heating device for crankshaft. BACKGROUND

[0002] Crankshaft is the core component of automobile engine, as one of the "skeleton" of engine, withstands cylinder inside combustion gas explosion pressure, reciprocating inertia force, rotational inertia force and other aspects of load, thus often need to quench the crankshaft to improve its strength, hardness and wear resistance, thereby prolong its service life and improve motion stability. Traditional quenching heating efficiency is low, uneven, therefore, it is very necessary to develop a kind of induction heating device for crankshaft.

[0003] At present, the existing Chinese patent publication number CN116083692A discloses a crankshaft induction heating quenching device, the device is provided with a supporting mechanism above the cooling tank to support and position the crankshaft, and then the open-close induction device is used to inductively heat the connecting rod journal, and the heated crankshaft is lowered into the cooling tank for quenching, which can effectively avoid the risk of scalding caused by hoisting after heating. However, during the heating process of the crankshaft, the device cannot adjust the position to ensure that the axis of the induction coil coincides with the axis of each section of the crankshaft, so that the surface of the crankshaft is unevenly heated, affecting the quenching effect.

[0004] In summary, although the existing induction heating device applied to crankshaft can realize induction heating of crankshaft to some extent, there are still many deficiencies, therefore, we have developed an induction heating device for crankshaft. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide an induction heating device for crankshaft, which adjusts the position of the induction coil in the horizontal direction by using a linear motor and a first electric push rod, adjusts the position of the induction coil in the vertical direction by using a second electric push rod, so that the center of the induction coil coincides with the center of each section of the crankshaft, thereby making the heating of the crankshaft more uniform. The crankshaft is positioned and clamped by the three-jaw chuck and the jacking block, so that the positioning accuracy is high and the fixation is firm. In summary, the induction heating device has high positioning accuracy and uniform heating, and can effectively solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an induction heating device for crankshaft, comprising a base, a three-jaw chuck, a linear motor, a first electric push rod, a second electric push rod and an induction coil.

[0007] The base is screw-connected with a three-jaw chuck on one side, and is screw-connected with a lead screw on the other side opposite to the three-jaw chuck, one end of the lead screw is welded with a pressing block towards the three-jaw chuck, the other end of the lead screw is key-connected with a crank handle, the base is screw-connected with the linear motor above the three-jaw chuck, the slider of the linear motor is welded with the first electric push rod, the telescopic end of the first electric push rod is welded with a clamp, the clamp is internally screw-locked with the second electric push rod, the telescopic end of the second electric push rod is screw-connected with an induction coil fixing plate, the induction coil fixing plate is clamped with the induction coil below, and the induction coil is sleeved on the outer side of the crankshaft.

[0008] Preferably, the end of the pressing block is in a dome shape, and is in point contact with the end of the crankshaft.

[0009] Preferably, the length direction of the linear motor is perpendicular to the length direction of the crankshaft, the first electric push rod is perpendicular to the welding surface of the slider of the linear motor, and the axis of the clamp is perpendicular to the axis of the first electric push rod.

[0010] Preferably, the second electric push rod penetrates through the clamp, and the axis of the second electric push rod is perpendicular to the axis of the crankshaft.

[0011] Preferably, the clamped position of the induction coil and the induction coil fixing plate is insulated, and the axis of the induction coil coincides with the overall axis of the crankshaft.

[0012] Preferably, the material of the induction coil fixing plate is nickel-based alloy, and the second electric push rod has a self-locking function and will not slide downward under the pulling force of the induction coil fixing plate and the induction coil.

[0013] Preferably, the front end of the base is screw-connected with a controller, the controller is electrically connected with the linear motor, the first electric push rod and the second electric push rod and controls corresponding actions.

[0014] Compared with the prior art, the beneficial effects of the utility model are that: the position of the induction coil in the horizontal direction is adjusted through the linear motor and the first electric push rod, the position of the induction coil in the vertical direction is adjusted through the second electric push rod, the center of the induction coil coincides with the center of each section of the crankshaft, so that the crankshaft is heated more uniformly; the crankshaft is positioned and clamped through the three-jaw chuck and the pressing block, the positioning precision is high, and the fixation is firm; the start and stop of the induction coil and the movement of the linear motor, the first electric push rod and the second electric push rod are controlled through the controller, and the degree of automation is high. In summary, the induction heating device has the advantages of simple structure, high positioning precision and high degree of automation, and the heating is uniform. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the axonometric view of the utility model;

[0016] Figure 2 is a front view of the utility model;

[0017] Figure 3 is a top view of the utility model;

[0018] Figure 4 is a local enlarged view of the utility model.

[0019] In the figure: 1 is a machine base, 2 is a three-jaw chuck, 3 is a controller, 4 is a lead screw, 5 is a clamping block, 6 is a crank handle, 7 is a linear motor, 8 is a first electric push rod, 9 is a clamp, 10 is a second electric push rod, 11 is an induction coil fixing plate, 12 is an induction coil, 13 is a crankshaft. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: an induction heating device for crankshaft, including machine base 1, three-jaw chuck 2, linear motor 7, first electric push rod 8, second electric push rod 10 and induction coil 12;

[0022] Three-jaw chuck 2 is screwed on one side of machine base 1, and lead screw 4 is connected by screw thread on the other side of machine base 1 relative to three-jaw chuck 2, and clamping block 5 is welded on the end of lead screw 4 towards three-jaw chuck 2, and crank handle 6 is keyed on the other end of lead screw 4, and linear motor 7 is screwed on the top of three-jaw chuck 2 corresponding to machine base 1, and first electric push rod 8 is welded on the slider of linear motor 7, and clamp 9 is welded on the telescopic end of first electric push rod 8, and second electric push rod 10 is locked by screw on the inner side of clamp 9, and induction coil fixing plate 11 is screwed on the telescopic end of second electric push rod 10, and induction coil 12 is clamped on the lower side of induction coil fixing plate 11, and induction coil 12 is sleeved on the outer side of crankshaft 13;

[0023] It can be understood that the lead screw 4 is rotated by rotating the handle 6, the lead screw 4 drives the top block 5 to move and tightly press one end of the crankshaft 13, the other end of the crankshaft 13 is clamped and fixed by the three-jaw chuck 2, the three-jaw chuck 2 and the top block 5 are used to position and clamp the crankshaft 13, the positioning accuracy is high, and the fixation is firm; after the crankshaft 13 is clamped and fixed, the position of the induction coil 12 in the horizontal direction is adjusted by the linear motor 7 and the first electric push rod 8, that is, the linear motor 7 drives the first electric push rod 8 to move forward and backward, and the first electric push rod 8 drives the induction coil 12 to move left and right, so that the movement of the induction coil 12 in the horizontal direction is realized, the position of the induction coil 12 in the vertical direction is adjusted by the second electric push rod 8, the XYZ-axis movement of the induction coil 12 is realized, and then the center of the induction coil 12 can coincide with the center of each heating part of the crankshaft 13, so that the crankshaft 13 is heated more uniformly and efficiently, and the automation degree is high;

[0024] Further, the end of the top block 5 is dome-shaped and in point contact with the end of the crankshaft 13, the end of the crankshaft 13 has a process blind hole for cooperating with the top block 5 to realize point positioning and ensure accurate positioning;

[0025] Further, the length direction of the linear motor 7 is perpendicular to the length direction of the crankshaft 13, the first electric push rod 8 is perpendicular to the sliding block welding surface of the linear motor 7, the axis of the clamp 9 is perpendicular to the axis of the first electric push rod 8, and the second electric push rod 10 penetrates the clamp 9, and the axis of the second electric push rod 10 is perpendicular to the axis of the crankshaft 13, so that the induction coil 12 can only move along the XYZ-axis;

[0026] Further, the joint between the induction coil 12 and the induction coil fixing plate 11 is insulated to avoid electric leakage, and the axis of the induction coil 12 coincides with the overall axis of the crankshaft 13 to ensure that the center of the induction coil 12 can coincide with the center of the crankshaft 13 without deflection;

[0027] Further, the material of the induction coil fixing plate 11 is nickel-based alloy, and the second electric push rod 10 has a self-locking function and will not slide downward under the tension of the induction coil fixing plate 11 and the induction coil 12, so as to avoid the influence of the heating effect caused by the fact that the center of the induction coil 12 does not coincide with the center of the crankshaft 13 when sliding;

[0028] In addition, the front end of the machine base 1 is screwed with a controller 3, the controller 3 is electrically connected with the linear motor 7, the first electric push rod 8 and the second electric push rod 10 and controls corresponding actions; for different specifications of the crankshaft 13, the linear motor 7, the first electric push rod 8 and the second electric push rod 10 perform corresponding action trajectories, and the motion points are stored in the controller 3 in the form of a formula to realize automatic induction heating.

[0029] Working principle: in use, first, the crankshaft 13 is installed in the three-jaw chuck 2, then the crankshaft 13 is clamped by the lead screw 4 with the top block 5 through shaking the handle 6, so as to realize the positioning and clamping of the crankshaft 13, then the inductor coil 12 is heated by starting the controller 3, and the controller 3 controls the linear motor 7, the first electric push rod 8 and the second electric push rod 10 to execute different formula movements according to the specification size of the crankshaft 13, so that the center of the inductor coil 12 is always coincided with the center of each section of the crankshaft 13 under the linkage of the above-mentioned movement mechanism, thereby the crankshaft 13 is uniformly heated; after the heating of the crankshaft 13 is completed, the three-jaw chuck 2 is loosened and the handle 6 is shaken in the reverse direction, so as to unload the heated crankshaft 13, thus the induction heating of the crankshaft 13 is completed.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be changed, modified, replaced and varied in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An induction heating device for a crankshaft, characterized by: The utility model relates to a three-jaw chucking device, including base (1), three-jaw chuck (2), linear motor (7), first electric push rod (8), second electric push rod (10) and induction coil (12). The utility model discloses a three-jaw chucking device, including base (1), three-jaw chuck (2), linear motor (7), first electric push rod (8), second electric push rod (10) and induction coil (12).

2. An induction heating device for a crankshaft according to claim 1, characterized in that: The end of the top tight block (5) is dome-shaped, and the end of the crankshaft (13) is point contact.

3. An induction heating device for a crankshaft as defined in claim 1, characterized in that: The length direction of the linear motor (7) and the length direction of the crankshaft (13) are perpendicular, the first electric push rod (8) is perpendicular to the slider welding surface of the linear motor (7), and the axis of the clamp (9) is perpendicular to the axis of the first electric push rod (8).

4. An induction heating device for a crankshaft as defined in claim 1, wherein: The second electric push rod (10) penetrates the clamp (9), and the axis of the second electric push rod (10) is perpendicular to the axis of the crankshaft (13).

5. An induction heating device for a crankshaft as defined in claim 1, wherein: The induction coil (12) and the induction coil fixing plate (11) are insulated at the clamping position, and the axis of the induction coil (12) coincides with the overall axis of the crankshaft (13).

6. An induction heating device for a crankshaft as defined in claim 1, wherein: The material of the induction coil fixing plate (11) is nickel-based alloy, the second electric push rod (10) has a self-locking function, and will not slide downward under the tension of the induction coil fixing plate (11) and the induction coil (12).

7. An induction heating device for a crankshaft as defined in claim 1, wherein: The front end of the base (1) is screwed with a controller (3), and the controller (3) is electrically connected with the linear motor (7), the first electric push rod (8) and the second electric push rod (10) and controls corresponding actions.

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