Milling machine for machining key groove in crankshaft

Abstract

The utility model discloses a milling machine for machining a key groove in a crankshaft, which belongs to the technical field of milling machines and comprises a workbench and an L-shaped mounting frame, the workbench is arranged on one side of the L-shaped mounting frame, a milling cutter is mounted on the L-shaped mounting frame, a rotatable clamping device and a supporting component are mounted on the workbench, and the supporting component is mounted on the L-shaped mounting frame. The supporting assembly comprises a supporting plate and two second air cylinders driving the supporting plate to ascend and descend, a plurality of containing grooves are formed in the supporting plate, and a cooling device is further arranged on one side of the L-shaped mounting frame. The supporting assembly is arranged, the supporting plate is matched with the second air cylinder, so that the journal of the crankshaft can be placed in the containing grooves, the height and the position of the journal can be changed when the crankshaft is rotated, the height of the supporting plate can be adjusted through the second air cylinder, the containing grooves are suitable for the journals at different positions, and the crankshaft can be conveniently placed. Therefore, the crankshaft is supported and fixed, and the crankshaft can be placed more stably during machining.

Description

Technical Field

[0001] The utility model belongs to the technical field of milling machines, and particularly relates to a milling machine for machining keyways of crankshafts. Background Technique

[0002] A milling machine mainly refers to a machine tool for machining various surfaces of workpieces. Usually, the milling cutter rotates as the main motion, and the movement of the workpiece and the milling cutter is the feed motion. It can machine planes, grooves, and various curved surfaces, gears, etc.; a crankshaft is an important part on an engine, and its material is made of carbon structural steel or ductile iron. It has two important parts: the main journal and the connecting rod journal (and others); the main journal is installed on the cylinder block, the connecting rod journal is connected to the big end hole of the connecting rod, and the small end hole of the connecting rod is connected to the cylinder piston, which is a typical crank-slider mechanism. A milling machine is usually used for the crankshaft keyway.

[0003] In the Chinese utility model patent CN202321568356.6, with the patent name of a milling machine for machining keyways of crankshafts, an electric motor is used to rotate the mounting plate to rotate the crankshaft, thereby adjusting the machining surface of the crankshaft, and solving the problem that after the crankshaft is fixed in position during use, after machining one side, when machining the other side, it is necessary to remove the crankshaft and re-clamp it; however, in this patent, there is no setting for supporting and fixing the journal. When the keyway is being machined, the crankshaft is prone to rotation under the external force of the milling cutter, affecting the machining effect; and when the keyway is being machined, a large amount of heat is generated by the repeated grinding of the milling cutter and the crankshaft, which is likely to cause burns to the workpiece and affect the machining quality. Content of the Utility Model

[0004] The purpose of the utility model is to provide a milling machine for machining keyways of crankshafts to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A milling machine for machining keyways of crankshafts, including a workbench and an L-shaped mounting frame. The workbench is arranged on one side of the L-shaped mounting frame. A milling cutter is installed on the L-shaped mounting frame. A rotatable clamping device and a support assembly are installed on the workbench. The support assembly includes a support plate and two second cylinders for driving the support plate to lift. A plurality of placement grooves are opened on the support plate. A cooling device is also arranged on one side of the L-shaped mounting frame. The cooling device includes a spray head, a water pump and a water storage tank. The water inlet pipe of the water pump is fixedly connected to the water storage tank, and a connecting pipe is connected between the water pump and the spray head. A bracket is also installed on the top of the workbench, and the spray head is placed on the bracket.

[0006] Preferably, a waste material pool is opened in the workbench, and a drain port is arranged at the bottom of the waste material pool.

[0007] Preferably, the L-shaped mounting bracket includes a top plate and a side plate. A moving plate is mounted on the top plate, and the milling cutter is disposed on the moving plate.

[0008] Preferably, the clamping device includes clamping plates, a first cylinder for driving the clamping plates to move, and a rotating plate. Fixed clamps are mounted on the inner sides of the clamping plates and the rotating plate. Two fixing plates are also mounted on the workbench. The first cylinder is mounted on one of the fixing plates, and the rotating plate is rotatably mounted on the other fixing plate.

[0009] Preferably, the clamping device further includes a motor and a gearbox. The motor and the gearbox are both mounted on one side of the fixing plate. The motor is rotationally connected to the gearbox, and the output shaft of the gearbox is connected to the first cylinder.

[0010] Preferably, it further includes a base. The workbench and the L-shaped mounting bracket are both mounted on the top of the base, and the water storage tank is disposed on one side of the base.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] (1) By providing a support assembly in the present utility model, through the cooperation of the support plate and the second cylinder, the journal of the crankshaft can be placed in the placement groove. When the crankshaft rotates, the height and position of the journal will also change. The height of the support plate can be adjusted by the second cylinder, and multiple placement grooves are suitable for journals in different positions, thereby supporting and fixing the crankshaft to ensure that it is placed more stably during processing.

[0013] (2) Through the cooperation of the spray head, the water pump and the water storage tank in the present utility model, the water pump pumps the water in the water storage tank into the spray head and sprays it on the milling cutter and the crankshaft, thereby reducing the heat generated when the milling cutter cuts the keyway and ensuring the processing quality of the crankshaft. At the same time, the iron chips generated during processing can also be flushed into the waste pool together and discharged from the drain port to ensure the cleanliness of the milling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is a right view of the present utility model;

[0016] Figure 3 is a top view of the workbench of the present utility model;

[0017] Figure 4 is a schematic structural view of the support assembly of the present utility model.

[0018] In the figure: 1 - milling cutter; 2 - L-shaped mounting bracket; 3 - clamping plate; 4 - fixing plate; 5 - first cylinder; 6 - motor; 7 - workbench; 8 - drain outlet; 9 - base; 10 - second cylinder; 11 - moving plate; 12 - rotating plate; 13 - fixing clamp; 14 - spray head; 15 - support bracket; 16 - connecting pipe; 17 - water pump; 18 - water storage tank; 19 - support plate; 191 - placement groove; 20 - waste pool. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1 - 4 As shown, the present invention provides the following technical solution: A milling machine for machining keyways of a crankshaft, including a workbench 7 and an L-shaped mounting bracket 2. The workbench 7 is arranged on one side of the L-shaped mounting bracket 2. A milling cutter 1 is installed on the L-shaped mounting bracket 2. A rotatable clamping device and a support assembly are installed on the workbench 7. The support assembly includes a support plate 19 and two second cylinders 10 for driving the support plate 19 to lift. A plurality of placement grooves 191 are formed on the support plate 19. A cooling device is also arranged on one side of the L-shaped mounting bracket 2. The cooling device includes a spray head 14, a water pump 17 and a water storage tank 18. The water storage tank 18 can also be set as a cooling water device. The water inlet pipe of the water pump 17 is fixedly connected to the water storage tank 18, and a connecting pipe 16 is connected between the water pump 17 and the spray head 14. A support bracket 15 is also installed on the top of the workbench 7, and the spray head 14 is placed on the support bracket 15;

[0021] A waste pool 20 is opened inside the workbench 7, and a drain outlet 8 is arranged at the bottom of the waste pool 20;

[0022] The L-shaped mounting bracket 2 includes a top plate and a side plate. A moving plate 11 is installed on the top plate, and the milling cutter 1 is arranged on the moving plate 11. The specific structures of the moving plate 11 and the driving of the milling cutter 1 have been shown in the patent CN201821972485.0.

[0023] In view of the above, when using this milling machine for machining keyways of a crankshaft, the crankshaft is clamped by the clamping device, the second cylinder 10 is started, so that the support plate 19 at the top of the second cylinder 10 approaches the crankshaft until the placement groove 191 abuts against the crankshaft journal, supporting the journal and preventing it from rotating during the machining process. After being supported, the crankshaft is machined for keyways by the milling cutter 1;

[0024] During processing, the water pump 17 can be started. The water in the water storage tank 18 is pumped into the nozzle 14 through the water pump 17. The nozzle 14 sprays the water on the milling cutter 1 and the crankshaft being processed to cool them, reducing the heat generated during the grinding process of the milling cutter 1 and ensuring that the crankshaft is not damaged. At the same time, the iron filings generated during processing can be flushed into the waste pool 20 together, and the waste water is discharged from the drain port 8 at the bottom of the waste pool 20.

[0025] Specifically, as Figure 1 and Figure 3 shown, in one embodiment, regarding the above clamping device:

[0026] The clamping device includes a clamping plate 3, a first cylinder 5 for driving the clamping plate 3 to move, and a rotating plate 12. Fixed clamps 13 are installed on the inner sides of the clamping plate 3 and the rotating plate 12. The fixed clamp 13 is set as a fixed cylinder. Two fixing plates 4 are also installed on the workbench 7. The first cylinder 5 is installed on one of the fixing plates 4, and the rotating plate 12 is rotatably installed on the other fixing plate 4;

[0027] The clamping device further includes a motor 6 and a gearbox. The motor 6 and the gearbox are both installed on one side of the fixing plate 4. The motor 6 is rotationally connected to the gearbox, and the output shaft of the gearbox is connected to the first cylinder 5. A driving gear and a driven gear are arranged in the gearbox. The motor 6 is rotationally connected to the driving gear, and the driving gear meshes with the driven gear for transmission. The output shaft of the driven gear is connected to the first cylinder 5, so as to realize the motor 6 driving the clamping plate 3 and the rotating plate 12 to rotate.

[0028] In view of the above, when using this clamping device, the main shaft end of the crankshaft is placed in the fixed clamp 13 on one side of the rotating plate 12. The first cylinder 5 is started, and the first cylinder 5 drives the clamping plate 3 and the fixed clamp 13 on the clamping plate 3 to move towards the fixed clamp 13 on one side of the rotating plate 12 until the other main shaft end of the crankshaft is fixed in the fixed clamp 13 on the clamping plate 3, so that the two fixed clamps 13 clamp the crankshaft;

[0029] After one side of the crankshaft is processed, the motor 6 drives the clamping plate 3 and the rotating plate 12 to rotate, turning the crankshaft to the other side to be processed, without manual turning, which is more convenient to use.

[0030] In addition, as Figure 1 and Figure 2 shown, in the present invention, it further includes a base 9. The workbench 7 and the L-shaped mounting bracket 2 are both installed on the top of the base 9, and the water storage tank 18 is arranged on one side of the base 9. The base 9 is used to support and install the workbench 7 and the L-shaped mounting bracket 2.

[0031] And the relevant electrical components in the present invention are all controlled and started by an external controller.

[0032] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A milling machine for machining keyways of crankshafts, characterized in that: The invention comprises a workbench (7) and an L-shaped mounting frame (2), wherein the workbench (7) is arranged on one side of the L-shaped mounting frame (2), a milling cutter (1) is installed on the L-shaped mounting frame (2), a rotatable clamping device and a support assembly are installed on the workbench (7), the support assembly comprises a support plate (19) and two second cylinders (10) for driving the support plate (19) to rise and fall, a plurality of placement grooves (191) are provided on the support plate (19), a cooling device is also arranged on one side of the L-shaped mounting frame (2), the cooling device comprises a nozzle (14), a water pump (17) and a water storage tank (18), a water inlet pipe of the water pump (17) is fixedly connected to the water storage tank (18), and a connecting pipe (16) is connected between the water pump (17) and the nozzle (14), and a bracket (15) is also installed on the top of the workbench (7), and the nozzle (14) is placed on the bracket (15).

2. A milling machine for machining keyways of crankshafts according to claim 1, characterized in that: A waste pool (20) is provided in the workbench (7), and a drainage outlet (8) is provided at the bottom of the waste pool (20).

3. A milling machine for machining keyways of crankshafts according to claim 1, characterized in that: The L-shaped mounting frame (2) comprises a top plate and side plates, a movable plate (11) is mounted on the top plate, and the milling cutter (1) is arranged on the movable plate (11).

4. A milling machine for machining keyways of crankshafts according to claim 1, characterized in that: The clamping device comprises a clamping plate (3), a first cylinder (5) for driving the clamping plate (3) to move, and a rotating plate (12); a fixing clamp (13) is installed on the inner side of each of the clamping plate (3) and the rotating plate (12); two fixing plates (4) are also installed on the workbench (7); the first cylinder (5) is installed on one of the fixing plates (4), and the rotating plate (12) is rotatably installed on the other fixing plate (4).

5. A milling machine for machining keyways of crankshafts according to claim 4, characterized in that: The clamping device also includes a motor (6) and a gear box, wherein the motor (6) and the gear box are both mounted on one side of the fixed plate (4), the motor (6) is rotationally connected to the gear box, and the output shaft of the gear box is connected to the first cylinder (5).

6. A milling machine for machining keyways of crankshafts according to claim 1, characterized in that: It also comprises a base (9), the workbench (7) and the L-shaped mounting frame (2) are both mounted on the top of the base (9), and the water storage tank (18) is arranged on one side of the base (9).

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