Background
The vertical machining center is a machining center with a main shaft in a vertical state, is mainly a fixed upright column in structural form, is rectangular, has no indexing rotation function, is suitable for machining disc, sleeve and plate parts, generally has three linear motion coordinate axes, can be provided with a rotary table rotating along a horizontal axis, and is used for machining spiral line parts.
The Chinese patent with the application number of 2016111880589 discloses a direct-drive exchange workbench based on positioning and locking, which comprises a machine tool workbench, a DD motor driving mechanism, an exchange workbench, an exchange base, a DD motor brake positioning oil cylinder, a DD motor rotor, a hydraulic expansion sleeve, an exchange workbench body, a DD motor stator, a floating oil cylinder, a clamp oil way distributor, a rotating shaft and a shifting fork, wherein the rotating shaft is arranged in the DD motor driving mechanism, the floating oil cylinder and the clamp oil way distributor are arranged below the exchange workbench body, the floating oil cylinder is connected with the rotating shaft, the rotating shaft is connected with the shifting fork, the DD motor rotor rotates 180 degrees to rotatably exchange the positions of the machine tool workbench and the exchange workbench, and the hydraulic expansion sleeve expands after being filled with oil and locks the DD motor rotor. The exchange workbench has no mechanical transmission structure, is positioned and locked by the hydraulic expansion sleeve, can be directly driven to position, has no reverse clearance, has excellent servo system responsiveness, and realizes quick and high-precision positioning.
The above patent and the prior art have more structures for driving the two work tables to exchange positions, but how to quickly combine the work tables with the saddle, and how to ensure the connection of the negative pressure of the adsorption holes on the adsorption type work table is the technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a can be quick align change table and saddle, realize the automatic direction assembly, raise the efficiency.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a workstation exchange structure of vertical machining center, includes saddle, base and two change table, is provided with lifting and drop rotating mechanism between two change table, and two change table are located saddle and base respectively, be provided with a plurality of bellied frustum that make progress on the saddle, change table's bottom be provided with frustum complex awl section of thick bamboo.
Further a plurality of absorption holes have been seted up to change table upper surface, have seted up the vacuum cavity in the change table, be provided with the vacuum opening with the vacuum cavity intercommunication on the awl section of thick bamboo, be provided with the absorption passageway with the vacuum opening intercommunication on the frustum, the absorption passageway extends to the saddle lateral surface.
And an upward boss is arranged on one side of the lifting and rotating mechanism, which faces the exchange workbench, and a hook groove which is matched with the boss and faces downwards is arranged on the exchange workbench.
Further, a guide positioning groove is formed in the boss, and a guide positioning rod is arranged in the hook groove.
The side surface of the boss is an inclined surface.
Further lifting and rotating mechanism includes the bottom plate, is provided with the lift cylinder on the bottom plate, is provided with the rotary cylinder on the lift cylinder, and the boss sets up on the rotary cylinder.
Compared with the prior art, the beneficial effects of the utility model are that: the exchange workbench and the saddle are guided and positioned by the aid of the frustum and the cone cylinder, workpieces to be machined can be adsorbed by the aid of negative pressure, and meanwhile the stability of combination of the exchange workbench and the saddle is improved; when the exchange workbench is taken and placed by the lifting and rotating mechanism, the boss can extend into the hook groove to lift the exchange workbench, put down or drive the exchange workbench to rotate, the guide positioning groove and the guide positioning rod can be used for guaranteeing smooth matching of the boss and the hook groove, the exchange workbench is prevented from being separated from the lifting and rotating mechanism, and the precision is improved.
Detailed Description
In the description of the present invention, it should be noted that, for the orientation words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and the positional relationship are indicated based on the orientation or the positional relationship shown in the drawings, and the description is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and "a plurality" or "a plurality" in the description of the invention means two or more unless a specific definition is explicitly provided.
The utility model provides a workstation exchange structure of vertical machining center, includes saddle 3, base 2 and two change table 1, is provided with lifting and drop rotating mechanism 4 between two change table 1, and two change table 1 are located saddle 3 and base 2 respectively, be provided with a plurality of bellied frustum 31 that make progress on the saddle 3, the bottom of change table 1 be provided with frustum 31 complex awl section of thick bamboo 12.
The base 2 is used for temporarily supporting the exchange workbench 1, and the saddle 3 is used for driving the exchange workbench 1 to move so as to process products.
As shown in fig. 6, in the present embodiment, a frustum 31 is respectively disposed on the periphery of the saddle 3, and four conical cylinders 12 are correspondingly disposed on the exchange workbench 1, so that when the exchange workbench 1 is replaced by the lifting and rotating mechanism 4, the new exchange workbench 1 can ensure stable and accurate matching with the saddle 3.
In this embodiment, preferably, the exchange workbench 1 has a plurality of adsorption holes 11 on the upper surface thereof, the exchange workbench 1 has a vacuum cavity 13 therein, the conical cylinder 12 has a vacuum port 121 communicated with the vacuum cavity 13, the conical table 31 has an adsorption passage 311 communicated with the vacuum port 121, and the adsorption passage 311 extends to the outer side surface of the saddle 3.
By connecting the adsorption channel 311 with a negative pressure device, a product to be processed is fixed on the exchange workbench 1 and is placed on the saddle 3, the adsorption channel 311 on the frustum 31 is communicated with the vacuum cavity 13 on the exchange workbench 1 through the vacuum port 121, so that the product can be adsorbed on the exchange workbench 1, and meanwhile, the adsorption can assist the exchange workbench 1 to be fixed on the saddle 3, thereby improving the stability; when changing change table 1, only need stop negative pressure equipment, time absorption hole 11 does not produce the adsorption affinity, promotes change table 1 on the saddle 3 and can shift this change table 1, does not have extra trachea to connect, and is very convenient.
In the preferred embodiment, an upward boss 41 is disposed on one side of the lifting and rotating mechanism 4 facing the exchange workbench 1, and a hook groove which is engaged with the boss 41 and faces downward is disposed on the exchange workbench 1.
As shown in fig. 2 and 3, the hook slot is composed of a buckle plate 5, and an opening is arranged only below the hook slot, when the boss 41 rises, the boss can extend into the hook slot to clamp the whole exchange workbench 1, so that the exchange workbench 1 rises integrally to separate from the saddle 3 and the base 2, then the two exchange workbench 1 positions are changed by rotating 180 degrees smoothly, the exchange workbench 1 can be placed on the saddle 3 and the base 2 when the boss falls to the lowest position, the boss 41 can separate from the hook slot, and the saddle 3 can drive the exchange workbench 1 to move transversely.
In this embodiment, a guide positioning slot 411 is disposed on the boss 41, a guide positioning rod 51 is disposed in the hook slot, the boss 41 can be smoothly matched with the hook slot by the guide positioning rod 51 and the guide positioning slot 411, wherein the guide positioning rod 51 can be horizontal, one side of the guide positioning rod 51 facing the boss 41 is arc-shaped, or vertical, and one side of the guide positioning rod 51 facing the boss 41 is pointed.
In this embodiment, the side surface of the boss 41 is preferably a slope.
In this embodiment, the preferred lifting and rotating mechanism 4 includes a bottom plate, a lifting cylinder is disposed on the bottom plate, a rotating cylinder is disposed on the lifting cylinder, and the boss 41 is disposed on the rotating cylinder.
Of course, the lifting and rotating mechanism 4 may also take other forms, such as an angle cylinder.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.