Keyway milling device for shaft workpieces

Abstract

The utility model relates to a milling keyway processing device for shaft workpieces, which comprises a base, a linear guide rail, a first clamping mechanism and a second clamping mechanism, the linear guide rail is arranged on the base, the first clamping mechanism is arranged at one end of the linear guide rail, the first clamping mechanism is fixed on the linear guide rail, and the second clamping mechanism is arranged on the linear guide rail in a sliding manner; the first clamping mechanism comprises a clamp seat, a left adjusting rod and a right adjusting rod are arranged at the left end and the right end of the clamp seat respectively, the left adjusting rod is hinged to a movable pressing plate, and the right end of the movable pressing plate can ascend and descend on the right adjusting rod to adjust the height. According to the utility model, the labor-hour waste caused by frequent tool replacement due to remodeling is effectively reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a keyway milling processing device for shaft workpieces. Background Art

[0002] Keyway milling is a process of milling a keyway on the surface of a workpiece with a milling cutter. The workpiece needs to be clamped and milled with a milling cutter. During the processing, the keyway accuracy is required to be high; and when the keyway is milled on a shaft workpiece, the workpiece needs to be fixed and clamped and the keyway accuracy is required to be higher. When clamping keyways of workpieces with different diameters, if ordinary flat-nose pliers are used, the symmetry between the keyway and the workpiece diameter needs to be readjusted, and the center height of ordinary flat-nose pliers clamping workpieces of different diameters will change. Therefore, the alignment device of the end face cavity needs to be readjusted in height, which is time-consuming and labor-intensive and affects the processing accuracy.

[0003] The commonly used method of milling keyways for shaft workpieces is to use two V-shaped irons to support the shaft workpiece and calibrate the side busbar and the upper busbar. Figure 1 , Figure 1 The schematic diagram of the structure of the existing tooling for milling keyways for shaft workpieces is shown. However, due to the lack of shaft segments with the same shaft diameter, shaft workpieces can only select shaft segments with similar sizes to mount V-shaped irons. When clamping the shaft segment with a small diameter, it is necessary to install equal height blocks to ensure that it is at the same height as the center line of the other shaft segment. At the same time, the side busbar and upper busbar runout are corrected to ≤0.02mm before keyway processing is performed. Due to the different shaft diameters of shaft workpieces, this method requires frequent replacement of V-shaped irons of different sizes when changing to different shaft diameters during processing in a machining center. At the same time, it is also necessary to correct the side busbar and upper busbar of the shaft. The changeover time is long and the changeover process is cumbersome, which reduces production efficiency. Summary of the invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a keyway milling processing device for shaft workpieces, which ensures the keyway quality by fixing the tooling and improving the tooling accuracy, while achieving processing convenience.

[0005] The purpose of the utility model is achieved in this way:

[0006] A device for milling keyway of shaft workpieces, comprising a base, a linear rail, a first clamping mechanism and a second clamping mechanism, wherein the base is provided with a linear rail, one end of the linear rail is provided with a first clamping mechanism, the first clamping mechanism is fixed on the linear rail, and the second clamping mechanism is slidably arranged on the linear rail; the first clamping mechanism comprises a clamp seat, and the left and right ends of the clamp seat are respectively provided with a left adjustment rod and a right adjustment rod;

[0007] A hinge seat is sleeved on the top end of the left adjusting rod, and the top end of the left adjusting rod is inserted into the bottom of the hinge seat. The hinge seat can move up and down to adjust the height. After reaching the determined height, it is tightened and fixed by the bolts on the left adjusting rod; the hinge seat is hinged to the left end of the movable pressure plate, and the right end of the movable pressure plate is provided with a through hole for inserting the right adjusting rod. The right end of the movable pressure plate can be raised and lowered on the right adjusting rod to adjust the height. After reaching the determined height, it is tightened and fixed by the bolts on the right adjusting rod, so that the left and right ends of the movable pressure plate are at the same height; the structure of the second clamping mechanism is the same as the first clamping mechanism.

[0008] A keyway milling device for shaft workpieces, wherein a V-shaped or arc-shaped jaw is provided between a left adjusting rod and a right adjusting rod for supporting the shaft workpiece.

[0009] A keyway milling processing device for shaft workpieces, wherein a cushion block is arranged on the surface of the jaws.

[0010] A keyway milling processing device for shaft workpieces, wherein a pressure cover is provided on the bottom surface of the movable pressure plate.

[0011] A device for milling key grooves of shaft workpieces, wherein the pressure cover comprises a connecting plate and side plates at the left and right ends of the connecting plate, and the side plates are inclined outwards and are in an open shape, so as to facilitate the pressing of the shaft workpiece.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model adopts a linear guide rail, a fixed clamping mechanism and a movable clamping mechanism on the base, and a movable pressure plate which can be adjusted up and down is arranged on the clamping mechanism, which effectively reduces the time waste of frequent replacement of tooling caused by model change. At the same time, the high-precision guide rail effectively eliminates the correction action of the generatrix on the part, which can save a lot of alignment time when aligning the axis of the part and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an existing tooling for milling keyways of shaft workpieces according to the utility model.

[0015] Figure 2 It is a structural schematic diagram of the utility model.

[0016] Figure 3 It is a side view of the utility model.

[0017] Figure 4 It is a top view of the utility model.

[0018] in:

[0019] Base 1, linear rail 2, first clamping mechanism 3, clamp seat 31, left adjusting rod 32, hinge seat 33, right adjusting rod 34, movable pressing plate 35, pressing cover 36, cushion block 37, second clamping mechanism 4, shaft workpiece 5. Implementation

[0020] In order to better understand the technical solution of the present invention, the following will be described in detail in conjunction with the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention, and are only implementations that can be adopted by the technical solution of the present invention. It should be noted that the description of the positional relationship of each component in this article, such as component A being located above component B, is based on the description of the relative positions of the components in the illustration, and is not intended to limit the actual positional relationship of the components. Example 1

[0021] See also Figure 1-Figure 4 , Figure 1 A structural schematic diagram of a milling keyway processing device for shaft workpieces is drawn. As shown in the figure, a milling keyway processing device for shaft workpieces of the utility model comprises a base 1, a linear rail 2, a first clamping mechanism 3 and a second clamping mechanism 4, the linear rail 2 is provided on the base 1, one end of the linear rail 2 is provided with a first clamping mechanism 3, the first clamping mechanism 3 is fixed on the linear rail 2, and the second clamping mechanism 4 is slidably arranged on the linear rail 2.

[0022] The first clamping mechanism 3 includes a clamp seat 31, and a left adjusting rod 32 and a right adjusting rod 34 are respectively provided at the left and right ends of the clamp seat 31. A V-shaped or arc-shaped jaw is provided between the left adjusting rod 32 and the right adjusting rod 34 for supporting the shaft workpiece 5; a pad 37 is provided on the surface of the jaw.

[0023] A hinge seat 33 is sleeved on the top end of the left adjusting rod 32, and the top end of the left adjusting rod 32 is inserted into the bottom of the hinge seat 33. The hinge seat 33 can be moved up and down to adjust the height. After reaching a certain height, it is tightened and fixed by the bolts on the left adjusting rod 32; the hinge seat 33 is hinged to the left end of the movable pressure plate 35, and the right end of the movable pressure plate 35 is provided with a through hole for inserting the right adjusting rod 34. The right end of the movable pressure plate 35 can be raised and lowered on the right adjusting rod 34 to adjust the height. After reaching a certain height, it is tightened and fixed by the bolts on the right adjusting rod 34, so that the left and right ends of the movable pressure plate 35 are at the same height.

[0024] A pressure cover 36 is provided on the bottom surface of the movable pressure plate 35 . The pressure cover 36 includes a connecting plate and side plates at the left and right ends of the connecting plate. The side plates are inclined outward and are open to facilitate pressing the shaft workpiece 5 .

[0025] The structure of the second clamping mechanism 4 is the same as that of the first clamping mechanism 3 , except that the clamp seat 31 of the first clamping mechanism 3 is fixed on the linear rail 2 , and the clamp seat of the second clamping mechanism 4 is slidably disposed on the linear rail 2 .

[0026] Working principle:

[0027] The utility model provides a milling keyway processing device for shaft workpieces, which adopts V-shaped iron center height positioning. The right V-shaped iron positions one end of the shaft, and the moving distance is short, and it can also be fixed, basically maintaining parallelism with the machine tool; the left V-shaped iron can move a long distance to reach the support range of the shaft, ensuring the support and positioning of the other end of the shaft. For the convenience of adjustment, a load-bearing linear guide pair is used for guiding movement, and a high-precision screw is used for adjustment to ensure that the overall positioning accuracy of the fixture is maintained at ≤0.015mm during adjustment. Considering the universal processing of multiple varieties, the output shaft is firmly fixed with an upper pressure plate, and a high-frequency quenching heat-treated pad is used in the positioning V-groove. The thickness is 10MM, and there are 16 pieces in total to consider the support of shafts of different diameters. The upper pressure plate can be adjusted up and down and pressed and fixed.

[0028] When changing the output shaft type, the operation is as follows: the V-shaped iron on the right side generally does not move, and the V-shaped iron support shaft on the left side is adjusted to leave an axial 2MM gap at the shaft shoulder for easy lifting, or add a 10MM shim to ensure clamping.

[0029] Operation when milling keyway: After the fixture is adjusted for normal use, hoist the shaft parts, and manually shake the tail top to position it axially, and then fix it on the pressure plate. If the keyway is processed on the outside of the V-shaped iron, use the handwheel to tighten the support contact force to prevent the workpiece from hanging in the air and vibrating the cutter during processing. Otherwise, rotate the support, loosen the tail top, and lift the workpiece away.

[0030] The above are only specific application examples of the utility model, and do not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A keyway milling device for shaft workpieces, characterized in that: The invention comprises a base (1), a linear rail (2), a first clamping mechanism (3) and a second clamping mechanism (4); the base (1) is provided with a linear rail (2); one end of the linear rail (2) is provided with a first clamping mechanism (3); the first clamping mechanism (3) is fixed on the linear rail (2); the second clamping mechanism (4) is slidably arranged on the linear rail (2); the first clamping mechanism (3) comprises a clamp seat (31); a left adjustment rod (32) and a right adjustment rod (34) are respectively arranged at the left and right ends of the clamp seat (31); A hinge seat (33) is sleeved on the top end of the left adjusting rod (32), and the top end of the left adjusting rod (32) is inserted into the bottom end of the hinge seat (33). The hinge seat (33) can be moved up and down to adjust the height. After reaching a certain height, it is tightened and fixed by the bolts on the left adjusting rod (32); the hinge seat (33) is hinged to the left end of the movable pressure plate (35), and the right end of the movable pressure plate (35) is provided with a through hole for inserting the right adjusting rod (34). The right end of the movable pressure plate (35) can be raised and lowered on the right adjusting rod (34) to adjust the height. After reaching a certain height, it is tightened and fixed by the bolts on the right adjusting rod (34), so that the left and right ends of the movable pressure plate (35) are at the same height; the structure of the second clamping mechanism (4) is the same as that of the first clamping mechanism (3).

2. The keyway milling device for shaft workpieces according to claim 1, characterized in that: A V-shaped or arc-shaped jaw is provided between the left adjustment rod (32) and the right adjustment rod (34) for supporting a shaft-like workpiece (5).

3. The keyway milling device for shaft workpieces according to claim 2, characterized in that: A cushion block (37) is provided on the surface of the jaws.

4. The keyway milling device for shaft workpieces according to claim 1, characterized in that: A pressure cover (36) is provided on the bottom surface of the movable pressure plate (35).

5. The keyway milling device for shaft workpieces according to claim 4, characterized in that: The pressure cover (36) comprises a connecting plate and side plates at the left and right ends of the connecting plate, the side plates being inclined outwards and in an open shape to facilitate pressing the shaft workpiece (5).

Images