Double-end planet inner hole grinding machine

Abstract

The utility model discloses a double-head planet inner hole grinding machine, which relates to the technical field of grinding machines and comprises a machine body, and a working table for fixing a workpiece and two grinding devices are arranged on the machine body. The grinding devices are arranged on the two sides of the working table. A first guide rail is arranged on the lathe bed; the first guide rail faces the working table; the first platform is slidably fixed on the first guide rail; a second guide rail is arranged on the first platform; the second guide rail extends horizontally and linearly and is perpendicular to the first guide rail. The second platform is slidably fixed on the second guide rail; a third guide rail is arranged on the second platform; the extending direction of the third guide rail is inclined relative to the horizontal plane; the grinding wheel assembly is slidably fixed to the third guide rail. The grinding wheel axis is parallel to the extension direction of the first guide rail. According to the double-end planetary inner hole grinding machine, the problem that a workpiece with large-diameter inner circles on the two sides cannot be machined through a double-end inner circle grinding machine is solved, and high-precision grinding machining can be conducted on the workpiece with the large-diameter inner circles on the two ends.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding machines, in particular to a double-head planetary internal hole grinding machine. Background Technique

[0002] A double-head internal hole grinding machine is a device that, after fixing a workpiece, simultaneously grinds the internal hole of the workpiece from both sides of the workpiece. Since only one clamping is required during the machining process to machine the workpiece from both sides of the workpiece, errors generated during multiple clampings of the workpiece can be avoided, thereby improving the coaxiality accuracy of the inner circles machined on both sides of the workpiece.

[0003] In the prior art, for example, a numerically controlled double-head internal hole grinding machine disclosed in Chinese Patent Application No. 201710772420.5 can clamp a workpiece and perform internal hole grinding on the workpiece from both sides of the workpiece. However, since the existing double-head internal hole grinding machines are usually used to machine specific parts, the axis of the grinding wheel shaft for grinding is collinear with the axis of the hole to be machined on the workpiece in advance at the beginning of internal hole grinding. Therefore, during the grinding process, only by controlling the grinding wheel to move along the axis of the grinding wheel rotation while the grinding wheel rotates can the grinding wheel extend into and leave the inner circle to be machined on the workpiece.

[0004] However, for workpieces with large-diameter inner circles on both sides, the common grinding wheel diameter is not sufficient to grind the large-diameter inner circles, and the production demand for these workpieces with large-diameter inner circles may be small. Customizing grinding wheels specifically for them will greatly increase the machining cost of the workpieces. Summary of the Utility Model

[0005] In view of the above technical problems, the double-head planetary internal hole grinding machine provided by the utility model can enable the grinding wheel to machine an internal hole with a diameter larger than the diameter of the grinding wheel when performing double-head machining on a workpiece.

[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0007] The double - head planetary internal hole grinding machine provided by the utility model includes a bed body, on which a workbench surface for fixing workpieces and two grinding devices are arranged; the grinding device includes a first platform, a second platform and a grinding wheel assembly; two first guide rails are arranged on the bed body; the extending direction of the first guide rail is a horizontal straight line; the two first guide rails are respectively arranged on both sides of the workbench surface; the extending directions of the two first guide rails are parallel; the first guide rail faces the workbench surface; the first platform is respectively slidably fixed on the first guide rail; a second guide rail is arranged on the first platform; the extending direction of the second guide rail is a horizontal straight line; the extending direction of the second guide rail is perpendicular to the extending direction of the first guide rail; the second platform is slidably fixed on the second guide rail; a third guide rail is arranged on the second platform; the extending direction of the third guide rail is inclined with respect to the horizontal plane; the grinding wheel assembly is slidably fixed on the third guide rail; the grinding wheel assembly includes a rotatable grinding wheel; the axis of the grinding wheel is parallel to the extending direction of the first guide rail.

[0008] The double - head planetary internal hole grinding machine provided by the utility model, preferably, the grinding wheel assembly includes a slide plate, a tool setter and a motor; the slide plate is slidably fixed on the third guide rail; the tool setter is fixed on the slide plate; the motor is fixed on the slide plate; the output shaft of the motor is fixed with the grinding wheel; the rotation axis of the grinding wheel is collinear with the axis of the output shaft of the motor; the tool setter is telescopic; the telescopic direction of the tool setter is parallel to the axis of the grinding wheel.

[0009] The double - head planetary internal hole grinding machine provided by the utility model, preferably, the angle between the extending direction of the third guide rail and the horizontal plane is 45°.

[0010] The double - head planetary internal hole grinding machine provided by the utility model, preferably, the workbench surface includes a workpiece pressing mechanism and a workpiece positioning mechanism; a plurality of vertically - arranged grooves are formed on the workpiece positioning mechanism; the workpiece pressing mechanism includes a plurality of vertically - telescopic claws.

[0011] The double - head planetary internal hole grinding machine provided by the utility model, preferably, further includes a first electric cylinder, a second electric cylinder and a third electric cylinder; the first electric cylinder is fixed on the bed body; the first electric cylinder can drive the first platform to slide relative to the first guide rail; the second electric cylinder is fixed on the first platform; the second electric cylinder can drive the second platform to slide relative to the second guide rail; the third electric cylinder is fixed on the second platform; the third electric cylinder can drive the grinding wheel assembly to slide relative to the third guide rail.

[0012] The above - mentioned technical solution has the following advantages or beneficial effects:

[0013] The utility model discloses a double - head planetary internal hole grinding machine, which relates to the technical field of grinding machines and comprises a bed body. A workbench surface for fixing a workpiece and two grinding devices are arranged on the bed body. The grinding device comprises a first platform, a second platform and a grinding wheel assembly. Two first guide rails are arranged on the bed body. The extending direction of the first guide rail is a horizontal straight line. The two first guide rails are respectively arranged on both sides of the workbench surface. The extending directions of the two first guide rails are parallel. The first guide rail faces the workbench surface. The first platform is respectively slidably fixed on the first guide rail. A second guide rail is arranged on the first platform. The extending direction of the second guide rail is a horizontal straight line. The extending direction of the second guide rail is perpendicular to the extending direction of the first guide rail. The second platform is slidably fixed on the second guide rail. A third guide rail is arranged on the second platform. The extending direction of the third guide rail is inclined with respect to the horizontal plane. The grinding wheel assembly is slidably fixed on the third guide rail. The grinding wheel assembly comprises a rotatable grinding wheel. The axis of the grinding wheel is parallel to the extending direction of the first guide rail. The double - head planetary internal hole grinding machine provided by the utility model solves the problem that workpieces with large - diameter inner circles on both sides cannot be processed by a double - head internal hole grinding machine, and can perform high - precision grinding processing on workpieces with large - diameter inner circles at both ends. Brief Description of the Drawings

[0014] By reading the detailed description of the non - restrictive embodiments with reference to the following drawings, the present utility model and its features, appearance and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the focus is on showing the gist of the present utility model.

[0015] Figure 1 It is a schematic diagram of the overall structure when clamping a workpiece of the double - head planetary internal hole grinding machine provided in Embodiment 1 of the present utility model. Detailed Embodiments

[0016] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. It should be noted that the terms used in the present utility model are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application.

[0017] The following will describe the technical solutions in the embodiments of the present invention with reference to 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. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

[0018] Embodiment 1:

[0019] The double-headed planetary internal hole grinding machine provided in Embodiment 1 of the present invention, as Figure 1 shown, includes a bed body 1 and two grinding devices 2. A workbench surface 11 for fixing a workpiece is provided on the bed body 1; the grinding device 2 includes a first platform 21, a second platform 22 and a grinding wheel assembly 23; two first guide rails 12 are provided on the bed body 1; the extending direction of the first guide rail 12 is a horizontal straight line; the two first guide rails 12 are respectively arranged on both sides of the workbench surface 11; the extending directions of the two first guide rails 12 are parallel; the first guide rail 12 faces the workbench surface 12; the first platform 21 is respectively slidably fixed on the first guide rail 12; a second guide rail 211 is provided on the first platform 21; the extending direction of the second guide rail 211 is a horizontal straight line; the extending direction of the second guide rail 211 is perpendicular to the extending direction of the first guide rail 12; the second platform 22 is slidably fixed on the second guide rail 211; a third guide rail 221 is provided on the second platform 22; the extending direction of the third guide rail 221 is inclined with respect to the horizontal plane; the grinding wheel assembly 23 is slidably fixed on the third guide rail 221; the grinding wheel assembly 23 includes a rotatable grinding wheel 231; the axis of the grinding wheel 231 is parallel to the extending direction of the first guide rail 12.

[0020] When the double - head planetary internal hole grinding machine provided in Embodiment 1 of the present utility model is working, it is necessary to fix the workpiece to be processed on the workbench surface 11 (the workpiece to be processed needs to process the coaxial inner circles on the opposite sides, and the diameter of the grinding wheel 231 is smaller than the diameter of the inner circle), so that the axis of the inner circle of the workpiece is horizontal. Control the two grinding devices 2 to grind the two inner circles of the workpiece respectively. The axis of the grinding wheel 231 is horizontal. By controlling the sliding of the first platform 21 relative to the first guide rail 12, all the structures fixed on the first platform 21 including the grinding wheel 231 move towards the workpiece. By controlling the movement of the second platform 22 relative to the second guide rail 211, adjust all the structures fixed on the second platform 22 including the grinding wheel 231 to perform a horizontal movement perpendicular to the axis of the grinding wheel 231, so as to change the distance between the axis of the grinding wheel 231 and the axis of the inner circle of the workpiece. By controlling the sliding of the grinding wheel assembly 23 relative to the third guide rail 221, control the non - horizontal movement of the grinding wheel 231 fixed on the grinding wheel assembly 23; The movement of the second platform 22 relative to the second guide rail 211 and the movement of the grinding wheel assembly 23 relative to the third guide rail 221 work together to adjust the distance between the axis of the grinding wheel 231 and the axis of the inner circle of the workpiece, so as to ensure that the grinding wheel 231 is tangent to the inner circle of the workpiece (realized by controlling the constancy of the axis of the grinding wheel 231 and the axis of the inner circle of the workpiece). Thus, the grinding of the inner circle of the workpiece is realized by the rotation of the grinding wheel 231; Compared with the prior art method that requires a grinding wheel 231 with the same size as the inner circle of the workpiece for processing, the equipment provided in this embodiment only needs to clamp the workpiece once first, ensuring high precision of the coaxiality of the two inner circles on the opposite sides of the workpiece. Secondly, the structure provided in this embodiment allows a small - diameter grinding wheel to process a large - diameter inner circle, thus avoiding the need to specially produce a batch of customized grinding wheels when producing some large workpieces with low demand, thereby saving the overall processing cost of the workpiece. Since it can process a variety of workpieces with inner circles at both ends and different - diameter inner circles, the equipment provided in this embodiment is more versatile.

[0021] The double - head planetary internal hole grinding machine provided in Embodiment 1 of the present utility model solves the problem that workpieces with large - diameter inner circles on both sides cannot be processed by a double - head internal hole grinding machine, and can perform high - precision grinding on workpieces with large - diameter inner circles at both ends.

[0022] As a preferred solution, in this embodiment, the grinding wheel assembly 23 includes a slide plate 232, a tool setter 233, and a motor 234; the slide plate 232 is slidably fixed on the third guide rail 221; the tool setter 233 is fixed on the slide plate 232; the motor 234 is fixed on the slide plate 232; a grinding wheel 231 is fixed to the output shaft of the motor 234; the axis of the rotating shaft of the grinding wheel 231 is collinear with the axis of the output shaft of the motor 234; the tool setter 233 is telescopic; the telescopic direction of the tool setter 233 is parallel to the axis of the grinding wheel 231. The tool setter 233 can measure the axial position of the workpiece, which belongs to the prior art. The specific functions and structures have been disclosed in a numerically controlled double-head turning and grinding machine with Chinese Patent Application No. 202223387481.5, and will not be elaborated here.

[0023] As a preferred solution, in this embodiment, the extension direction of the third guide rail 221 forms an angle of 45° with respect to the horizontal plane.

[0024] To stably fix the workpiece and ensure the normal progress of workpiece processing, in this embodiment, the workbench surface 11 includes a workpiece pressing mechanism 111 and a workpiece positioning mechanism 112; a plurality of vertically arranged grooves are formed on the workpiece positioning mechanism 112; the workpiece pressing mechanism 111 includes a plurality of claws that can be telescopically extended in the vertical direction. The grooves on the workpiece positioning mechanism 112 are for facilitating the fixing of the workpiece on the workbench surface 11. The claws of the pressing mechanism 111 can apply a downward pressure on the workpiece in the vertical direction, so that the workpiece is provided with pressure in the vertical direction, thereby restricting the vertical movement of the workpiece and preventing the workpiece from disengaging from the grooves.

[0025] As a preferred solution, in this embodiment, it further includes a first electric cylinder 3, a second electric cylinder 4, and a third electric cylinder 5; the first electric cylinder 3 is fixed on the machine body 1; the first electric cylinder 3 can drive the first platform 21 to slide relative to the first guide rail 12; the second electric cylinder 4 is fixed on the first platform 21; the second electric cylinder 4 can drive the second platform 22 to slide relative to the second guide rail 211; the third electric cylinder 5 is fixed on the second platform 22; the third electric cylinder 5 can drive the grinding wheel assembly 23 to slide relative to the third guide rail 221. (In this embodiment, it is preferably to use electric cylinders to push the platforms to move relative to the guide rails, and each grinding device 2 is equipped with a first electric cylinder 3, a second electric cylinder 4, and a third electric cylinder 5) The first electric cylinder 3 pushes the first platform 21 to slide relative to the first guide rail 12, the second electric cylinder 4 pushes the second platform 22 to move relative to the second guide rail 211, and the third electric cylinder 5 pushes the grinding wheel assembly 23 to move relative to the third guide rail 221.

[0026] In summary, the present utility model discloses a double-headed planetary internal hole grinding machine, which relates to the technical field of grinding machines and includes a bed body. A workbench surface for fixing a workpiece and two grinding devices are arranged on the bed body. The grinding device includes a first platform, a second platform and a grinding wheel assembly. Two first guide rails are arranged on the bed body. The extending direction of the first guide rail is a horizontal straight line. The two first guide rails are respectively arranged on both sides of the workbench surface. The extending directions of the two first guide rails are parallel. The first guide rail faces the workbench surface. The first platform is respectively slidably fixed on the first guide rail. A second guide rail is arranged on the first platform. The extending direction of the second guide rail is a horizontal straight line. The extending direction of the second guide rail is perpendicular to the extending direction of the first guide rail. The second platform is slidably fixed on the second guide rail. A third guide rail is arranged on the second platform. The extending direction of the third guide rail is inclined with respect to the horizontal plane. The grinding wheel assembly is slidably fixed on the third guide rail. The grinding wheel assembly includes a rotatable grinding wheel. The axis of the grinding wheel is parallel to the extending direction of the first guide rail. The double-headed planetary internal hole grinding machine provided by the present utility model solves the problem that workpieces with large-diameter inner circles on both sides cannot be processed by a double-headed internal hole grinding machine, and can perform high-precision grinding processing on workpieces with large-diameter inner circles at both ends.

[0027] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the description and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A double-head planetary internal hole grinder, comprising a bed, on which a working table for fixing a workpiece is arranged; It is characterized in that Also included are two sanding units; The grinding device comprises a first platform, a second platform and a grinding wheel assembly; Two first guide rails are arranged on the bed; the extension direction of the first guide rails is a horizontal straight line; the two first guide rails are respectively arranged on both sides of the work surface; the extension directions of the two first guide rails are parallel; the first guide rails are arranged toward the work surface; The first platforms are slidably fixed on the first guide rails respectively; A second guide rail is provided on the first platform; the extension direction of the second guide rail is a horizontal straight line; the extension direction of the second guide rail is perpendicular to the extension direction of the first guide rail; The second platform can be slidably fixed on the second guide rail; A third guide rail is provided on the second platform; the extension direction of the third guide rail is inclined compared to the horizontal plane; The grinding wheel assembly can be slidably fixed on the third guide rail; The grinding wheel assembly comprises a rotatable grinding wheel; the axis of the grinding wheel is parallel to the extension direction of the first guide rail.

2. The double-head planetary internal hole grinder according to claim 1, characterized in that: The grinding wheel assembly comprises a slide plate, a tool setting instrument and a motor; The slide plate is slidably fixed on the third guide rail; the tool setting instrument is fixed on the slide plate; the motor is fixed on the slide plate; the grinding wheel is fixed on the output shaft of the motor; the rotating shaft of the grinding wheel is colinear with the axis of the output shaft of the motor; The tool setting instrument is retractable; the retracting direction of the tool setting instrument is parallel to the axis of the grinding wheel.

3. The double-head planetary internal hole grinder according to claim 1, characterized in that: The extension direction of the third guide rail is at an angle of 45° relative to the horizontal plane.

4. The double-head planetary internal hole grinder according to claim 1, characterized in that: The work surface includes a workpiece clamping mechanism and a workpiece positioning mechanism; The workpiece positioning mechanism is provided with a plurality of grooves arranged in the vertical direction; the workpiece clamping mechanism comprises a plurality of clamping claws which can be extended and retracted in the vertical direction.

5. The double-head planetary internal hole grinder according to claim 1, characterized in that: Also includes a first electric cylinder, a second electric cylinder and a third electric cylinder; The first electric cylinder is fixed on the bed; the first electric cylinder can drive the first platform to slide relative to the first guide rail; The second electric cylinder is fixed on the first platform; the second electric cylinder can drive the second platform to slide relative to the second guide rail; The third electric cylinder is fixed on the second platform; the third electric cylinder can drive the grinding wheel assembly to slide relative to the third guide rail.

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