Quenching device for camshaft

Abstract

The utility model discloses a quenching device for a camshaft, which relates to the technical field of heat treatment equipment and comprises a first box body and a second box body, induction coils are mounted at the top ends of the side walls of the first box; a lead screw assembly is installed on the top face of the second box body, a transverse supporting arm is installed at the movable end of the lead screw assembly, and a clamping jaw is installed on the transverse supporting arm. An electric sliding rail is installed on the side wall of the second box body, and a bearing plate is installed at the movable end of the electric sliding rail. And a bearing hole is formed in the bearing plate. During quenching machining, the bearing plate, the machined part, the clamping jaw and the transverse supporting arm synchronously and longitudinally move, so that the bearing plate can apply supporting force to the machined part, the situation that the machined part is pulled and deformed under the action of self weight is avoided, and therefore the product quality is improved; after quenching machining is completed, the bearing plate stops moving longitudinally, the clamping jaw moves upwards, the machined part can be pulled out of the induction coil, compared with the scheme that in the prior art, the machined part can be pulled out only after a lower clamping jaw is loosened, operation is more convenient, and the manufacturing cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment equipment, in particular to a quenching device for a camshaft. Background Art

[0002] Induction hardening (HIH) is a metal heat treatment method that generates a certain amount of induced current on the surface of a workpiece, rapidly heating the part surface and then rapidly quenching it. The HIH device typically includes an induction coil that is placed around the periphery of the workpiece. When energized, the coil uses the principle of magnetic induction to generate heat on the workpiece surface for quenching.

[0003] In order to prevent the workpiece from bending and deforming under the action of its own weight after heating, traditional high-frequency quenching equipment usually clamps the camshaft as the workpiece longitudinally. However, the diameter uniformity of the camshaft is low, which causes the camshaft to produce slight deformation along the axial direction under the action of its own weight. For example, clamping the top end of the camshaft will cause the camshaft to elongate, and clamping the bottom end of the camshaft will cause the camshaft to shorten, thereby reducing the dimensional accuracy of the camshaft. Summary of the Invention

[0004] In order to overcome the problem in the above background technology that "longitudinal clamping during high-frequency quenching will cause slight deformation of the workpiece along the axial direction, resulting in reduced product quality", the utility model provides a camshaft quenching device.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A quenching device for a camshaft, comprising a first box body and a second box body that serve as structural supports, a receiving gap for processing operations being provided between the first box body and the second box body; an induction coil is installed at the top end of the side wall of the first box body near the receiving gap; a screw rod assembly is installed on the top surface of the second box body, a cross support arm is installed at the movable end of the screw rod assembly, a clamping claw is installed on the cross support arm, and the clamping claw is located directly above the induction coil; an electric slide rail is installed at the side wall of the second box body near the receiving gap, and a supporting plate that can move longitudinally synchronously with the cross support arm is installed at the movable end of the electric slide rail; a dust box is placed at the bottom end of the receiving gap, and the supporting plate is Z-shaped to adapt to the inner cavity of the dust box; the supporting plate is provided with a receiving hole, and the receiving hole is placed directly below the induction coil.

[0007] As a further optimization solution of the present invention, the inner side wall of the receiving hole is stepped to adapt to the lower end portions of different workpieces.

[0008] As a further optimization solution of the present invention, a rubber layer is provided in the inner cavity of the receiving hole.

[0009] As a further optimization solution of the present invention, the supporting plate includes a bottom supporting plate and side supporting plates that can rotate with each other and lock with each other, and the receiving hole is opened at the upper surface position of the bottom supporting plate.

[0010] As a further optimization solution of the present invention, a transverse plug-in shaft is fixedly connected to the end position of the bottom support plate, and the end of the plug-in shaft away from the bottom support plate is plugged into the end of the side support plate, and the plug-in shaft and the side support plate are connected through a bearing.

[0011] As a further optimization scheme of the present invention, the screw assembly includes four columns and a screw, the bottom ends of the columns are fixedly connected to the second box body, and the top ends of the columns are connected in pairs through two cross beams; a screw motor is provided between the two cross beams, and the output shaft of the screw motor is connected to the top end of the screw; the bottom end of the screw is connected to the box body through a bearing; the screw assembly also includes a drive block, and the four corners of the drive block are respectively provided with mounting holes sleeved on the surface of the column, and the middle part of the drive block is provided with a screw hole, and the screw is inserted into the screw hole and cooperates with each other through threads.

[0012] As a further optimized solution of the present invention, the cross bracing arm is fixedly connected to the side wall of the driving block.

[0013] As a further optimization scheme of the present invention, the bottom support plate is fixedly installed with a bottom support rib on the side wall of the bottom end, and the side support plate is fixedly installed with a side support rib on the bottom surface; the support plate also includes a limiting push block that can be clamped between the bottom support rib and the side support rib.

[0014] As a further optimization solution of the present invention, a gripping bar hole is provided at the bottom of the position-limiting push block.

[0015] As a further optimization solution of the present invention, the clamping jaws are electric or manual three-jaw chucks.

[0016] In summary, the benefits of the present invention are:

[0017] The utility model has a simple structure and reliable function. During the quenching process, the supporting plate, the workpiece, the clamping claws and the cross-bracing arms move longitudinally synchronously, so that the supporting plate can exert a supporting force on the workpiece, avoiding the workpiece from being tensilely deformed under the action of its own weight, thereby improving product quality. After the quenching process is completed, the supporting plate stops moving longitudinally, and the clamping claws move upward to extract the workpiece from the induction coil. Compared with the traditional technology in which the lower clamping claws need to be loosened before the workpiece can be extracted, the operation is more convenient and has a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described below with reference to the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the vertical section structure of the support plate;

[0021] Figure 3 Schematic diagram of the structure of the screw rod assembly;

[0022] Figure 4 This is a schematic diagram of the installation position and structure of the limit push block;

[0023] Figure 5 Schematic diagram of the relative rotation state of the bottom support plate;

[0024] Figure 6 This is a schematic diagram of the left-side view of the limit push block.

[0025] Description of reference numerals:

[0026] In the figure,

[0027] 0. Workpiece; 1. First box; 2. Second box; 3. Induction coil;

[0028] 4. Screw assembly; 41. Column; 42. Beam; 43. Drive block; 44. Screw;

[0029] 5. Cross support arm; 6. Clamping claw; 7. Electric slide rail;

[0030] 8. Support plate; 801. Socket hole; 802. Rubber layer; 81. Bottom support plate; 811. Bottom support rib; 82. Side support plate; 821. Side support rib; 822. Magnetic plate; 83. Connecting shaft; 84. Limit push block; 841. Gripping bar hole;

[0031] 9. Dust box. DETAILED DESCRIPTION

[0032] Based on the above structural features of the present application, the implementation methods of the present application are further described:

[0033] Reference Figures 1 to 5 This embodiment provides a camshaft quenching device, comprising a first housing 1 and a second housing 2, which serve as structural supports. A clearance for machining is defined between the first and second housings 1 and 2. The clearance has a rectangular cross-section and provides space for a longitudinally positioned workpiece 0. Both the first and second housings 1 and 2 are fixedly mounted on a workbench in a machining workshop, ensuring the clearance has a fixed width.

[0034] Reference Figure 1An induction coil 3 is installed on the top of the side wall of the first box body 1 close to the accommodating gap. After the induction coil 3 is energized, it is used to heat the workpiece 0 to achieve quenching.

[0035] Reference Figure 1 A screw assembly 4 is mounted on the top surface of the second housing 2. A cross arm 5 is mounted on the movable end of the screw assembly 4. A clamping claw 6 is mounted on the cross arm 5. The clamping claw 6 is located directly above the induction coil 3. The clamping claw 6 is used to clamp the top of the workpiece 0. The screw assembly 4 can drive the cross arm 5, clamping claw 6, and workpiece 0 to move downward or upward synchronously, thereby achieving the purpose of the induction coil 3 being arranged around the periphery of the workpiece 0 and moving longitudinally, further increasing the coverage area of ​​the quenching zone.

[0036] Reference Figure 1 An electric slide 7 is mounted on the side wall of the second housing 2 near the receiving gap. A support plate 8 is mounted on the movable end of the electric slide 7, capable of longitudinal movement synchronously with the cross-bracing arm 5. The track of the electric slide 7 is fixedly connected to the second housing 2 by bolts, and the slider of the electric slide 7 is fixedly connected to the support plate 8 by bolts. The electric slide 7 can drive the support plate 8 to move longitudinally.

[0037] Reference Figure 1 A dust box 9 is placed at the bottom of the receiving gap, and the supporting plate 8 is Z-shaped to fit the inner cavity of the dust box 9. The dust box 9 is used to collect dust that falls into the receiving gap during the processing operation. The user can pour out the dust by pulling out the dust box 9 horizontally.

[0038] Reference Figure 1 and Figure 2 The support plate 8 is provided with a receiving hole 801, which is located directly below the induction coil 3. The inner wall of the receiving hole 801 is stepped to accommodate the lower end of different workpieces 0. During use, the lower end of the workpiece 0 is inserted into the receiving hole 801. While the support plate 8 applies a supporting force to the workpiece 0, the receiving hole 801 can also radially restrain the workpiece 0, preventing radial bending deformation caused by localized heating and cooling of the workpiece 0, thereby achieving higher straightness of the workpiece 0.

[0039] Reference Figure 1 and Figure 2 The inner cavity of the receiving hole 801 is provided with a rubber layer 802. The rubber layer 802 is fixedly installed in the inner cavity of the receiving hole 801 by bonding or bolting and is adapted to the side wall and bottom surface of the inner cavity of the receiving hole 801 to reduce collision and wear between the workpiece 0 and the receiving hole 801.

[0040] Reference Figure 2 、 Figure 4 and Figure 5 The support plate 8 includes a bottom support plate 81 and side support plates 82 that can rotate and lock with each other. The receiving hole 801 is provided on the upper surface of the bottom support plate 81. The user releases the lock and rotates the bottom support plate 81 so that the receiving hole 801 faces downward, and the dust in the receiving hole 801 can be poured out.

[0041] Reference Figure 4 and Figure 5 The end position of the bottom support plate 81 is fixedly connected with a horizontal plug-in shaft 83 (for example, fixed by bolts or fixed by an integral type), and the end of the plug-in shaft 83 away from the bottom support plate 81 is inserted into the end of the side support plate 82, and the plug-in shaft 83 is connected to the side support plate 82 through a bearing.

[0042] Reference Figure 3 The screw assembly 4 includes four columns 41 and a screw 44. The bottom ends of the columns 41 are fixedly connected to the second box body 2 (for example, fixedly connected by bolts), and the top ends of the columns 41 are connected in pairs by two crossbeams 42. The two crossbeams 42 are both upright and parallel to each other. A screw motor is provided between the two crossbeams 42. The side walls of the two crossbeams 42 are respectively fixedly connected to the housing of the screw motor by bolts. The output shaft of the screw motor is connected to the top end of the screw 44 (for example, fixedly connected by bolts). The top of the screw 44 is connected to the bearing frame through a bearing, and the bearing frame is fixedly connected to the crossbeam 42 by bolts. The bottom end of the screw 44 is connected to the box body through a bearing. The screw assembly 4 also includes a drive block 43. The four corners of the drive block 43 are respectively provided with mounting holes sleeved on the surface of the side wall of the column 41. The middle part of the drive block 43 is provided with a screw hole. The screw 44 is inserted into the screw hole and cooperates with each other through threads. The screw motor drives the screw 44 to rotate, which can drive the driving block 43 to move longitudinally, and further drive the cross arm 5, the clamping claw 6 and the workpiece 0 to move longitudinally.

[0043] Reference Figure 3 The cross bracing arm 5 is fixedly connected to the side wall of the driving block 43 by bolts.

[0044] Reference Figure 4The bottom sidewall of the bottom support plate 81 is fixedly mounted with a bottom support rib 811 (for example, by bolts or an integral fixed connection), and the bottom surface of the side support plate 82 is fixedly mounted with a side support rib 821 (for example, by bolts or an integral fixed connection). The support plate 8 also includes a limiting push block 84 that can be clamped between the bottom support rib 811 and the side support rib 821. When a user inserts the limiting push block 84 between the bottom support rib 811 and the side support rib 821, a lock is achieved to prevent the bottom support plate 81 and the side support plate 82 from rotating relative to each other. When the user pulls out the limiting push block 84, the lock is released.

[0045] Reference Figure 4 A gripping hole 841 is provided at the bottom of the limit push block 84, and the bottom surface of the gripping hole 841 is wavy to fit the user's fingers for easy gripping.

[0046] Reference Figure 1 The clamping jaws 6 are electric or manual three-jaw chucks.

[0047] Reference Figure 6 A magnetic plate 822 is bolted to one side of the lower surface of the side support plate 82. The magnetic plate 822 is made of a permanent magnetic material (e.g., an Alnico permanent magnetic alloy, an FeCrCo permanent magnetic alloy, or a permanent ferrite). The stopper block 84 is made of a ferrous metal (e.g., No. 45 steel). Once the stopper block 84 is inserted, the magnetic plate 822 adheres to the stopper block 84, preventing it from accidentally falling out.

[0048] The present invention further includes an electrical cabinet, which is bolted to the outer wall of the second housing 2. The screw motor, electric slide 7, induction coil 3, and electric three-jaw chuck are connected to the electrical cabinet via wires and signal lines. The electrical cabinet is also connected to an external power supply and an external computer via wires and signal lines. The computer controls the start and stop of the screw motor, electric slide 7, induction coil 3, and electric three-jaw chuck through the electrical cabinet. The electrical cabinet can also control whether the cross brace arm 5 and the support plate 8 move longitudinally in sync.

[0049] The utility model has a simple structure and reliable function. During the quenching process, the supporting plate 8, the workpiece 0, the clamping claw 6 and the cross-bracing arm 5 move longitudinally synchronously, so that the supporting plate 8 can exert a supporting force on the workpiece 0 to prevent the workpiece 0 from being tensilely deformed under the action of its own weight. After the quenching process is completed, the supporting plate 8 stops moving longitudinally, and the clamping claw 6 moves upward to extract the workpiece 0 from the induction coil 3. Compared with the traditional technology in which the lower clamping claw needs to be loosened before the workpiece 0 can be extracted, the operation is more convenient and the demand for the lower clamping claw is reduced, thereby having a lower cost.

[0050] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0051] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0052] To sum up, for those skilled in the art, according to the guidance of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, replacements and deformations made to this utility model still fall within the scope of protection of this utility model.

Claims

1. A camshaft quenching device, characterized in that: It comprises a first box body (1) and a second box body (2) that play a structural supporting role, and a receiving gap for processing operations is provided between the first box body (1) and the second box body (2); An induction coil (3) is installed on the top of the side wall of the first box (1) close to the accommodating gap; A screw assembly (4) is installed on the top surface of the second box body (2), a cross bracing arm (5) is installed on the movable end of the screw assembly (4), a clamping claw (6) is installed on the cross bracing arm (5), and the clamping claw (6) is located directly above the induction coil (3); The second box (2) is provided with an electric slide rail (7) mounted on a side wall close to the accommodation gap, and a supporting plate (8) capable of longitudinally moving synchronously with the cross bracing arm (5) is mounted on the movable end of the electric slide rail (7); A dust box (9) is placed at the bottom end of the accommodating gap, and the supporting plate (8) is Z-shaped to fit the inner cavity of the dust box (9); The supporting plate (8) is provided with a receiving hole (801), and the receiving hole (801) is placed directly below the induction coil (3).

2. The camshaft quenching device according to claim 1, characterized in that: The inner side wall of the receiving hole (801) is stepped to adapt to the lower end of different workpieces (0).

3. The camshaft quenching device according to claim 2, characterized in that: The inner cavity of the receiving hole (801) is provided with a rubber layer (802).

4. The camshaft quenching device according to claim 3, characterized in that: The supporting plate (8) comprises a bottom supporting plate (81) and a side supporting plate (82) that can rotate with each other and lock with each other, and the receiving hole (801) is opened at a position on the upper surface of the bottom supporting plate (81).

5. The camshaft quenching device according to claim 4, characterized in that: A transverse plug-in shaft (83) is fixedly connected to the end of the bottom support plate (81), and one end of the plug-in shaft (83) away from the bottom support plate (81) is plugged into the end of the side support plate (82), and the plug-in shaft (83) and the side support plate (82) are connected via a bearing.

6. The camshaft quenching device according to claim 5, characterized in that: The screw assembly (4) includes four columns (41) and a screw (44), the bottom ends of the columns (41) are fixedly connected to the second box (2), and the top ends of the columns (41) are connected in pairs through two cross beams (42); a screw motor is provided between the two cross beams (42), and the output shaft of the screw motor is connected to the top end of the screw (44); the bottom end of the screw (44) is connected to the box through a bearing; the screw assembly (4) also includes a driving block (43), and the four corners of the driving block (43) are respectively provided with mounting holes sleeved on the surface of the column (41), and the middle part of the driving block (43) is provided with a screw hole, and the screw (44) is inserted into the screw hole and cooperates with each other through threads.

7. The camshaft quenching device according to claim 6, characterized in that: The cross bracing arm (5) is fixedly connected to the side wall of the driving block (43).

8. The camshaft quenching device according to claim 7, characterized in that: A bottom support rib (811) is fixedly mounted on the bottom side wall of the bottom support plate (81), and a side support rib (821) is fixedly mounted on the bottom surface of the side support plate (82); the support plate (8) further comprises a limiting push block (84) capable of being clamped between the bottom support rib (811) and the side support rib (821).

9. The camshaft quenching device according to claim 8, characterized in that: A gripping hole (841) is provided at the bottom of the position-limiting push block (84).

10. The camshaft quenching device according to claim 9, characterized in that: The clamping claw (6) is an electric or manual three-jaw chuck.

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