Double-station vertical cylindrical grinding machine

Abstract

The utility model discloses a double-station vertical cylindrical grinding machine which comprises a machine body and a stand column vertically arranged on the machine body. A vertical grinding wheel assembly is arranged in the middle of the machine body, two sides of the grinding wheel assembly are respectively provided with a group of feeding mechanisms, each feeding mechanism comprises an X-axis carriage and a Z-axis carriage which are vertically arranged, the X-axis carriages are slidably mounted on the stand columns through horizontal guide rail mechanisms, and first linear driving mechanisms are arranged between the X-axis carriages and the stand columns; the Z-axis carriage is slidably mounted on the X-axis carriage through a vertical guide rail mechanism, and a second linear driving mechanism is arranged between the Z-axis carriage and the X-axis carriage; a headstock assembly and a tailstock assembly which are used for clamping a workpiece are vertically arranged on the Z-axis carriage in a manner of facing each other; a grinding wheel capable of rotating horizontally is arranged at the upper end of the grinding wheel assembly, and the two sides of the grinding wheel protrude relative to the grinding wheel assembly towards the corresponding feeding mechanisms. The grinding tool has the advantages of being reasonable in structural design, capable of improving machining efficiency, beneficial to improving grinding precision and the like.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, and in particular to a dual-station vertical cylindrical grinding machine. Background Technology

[0002] External cylindrical grinding machines are used to process the outer surfaces and shoulder end faces of workpieces formed by the generatrices of cylindrical, conical, or other shapes. Among all grinding machines, external cylindrical grinding machines are the most widely used type of machine tool. They are generally composed of a cast iron bed as the base, a worktable, a headstock and tailstock that support and drive the workpiece rotation, a grinding wheel head (grinding head) that mounts the grinding wheels, a transverse feed mechanism that controls the dimensions of the workpiece being ground, and electrical and hydraulic devices that control the movement of the machine tool's moving parts.

[0003] Traditional cylindrical grinding machines have a horizontal structure, where the workpiece is horizontally clamped by a chuck for grinding. When machining long shaft-like parts, the horizontally placed shafts are affected by the bending moment due to their own weight, which affects the grinding accuracy. In addition, existing cylindrical grinding machines can only grind one shaft-like workpiece at a time, resulting in low processing efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: how to provide a dual-station vertical cylindrical grinding machine with a reasonable structural design that can improve processing efficiency and improve grinding accuracy.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A dual-station vertical cylindrical grinding machine includes a bed and a column vertically mounted on the bed, the column extending along the length of the back side of the bed; a vertically mounted grinding wheel assembly is located in the middle of the bed, and a set of feed mechanisms is provided on each side of the grinding wheel assembly, the feed mechanism including a vertically mounted X-axis slide and a Z-axis slide, the X-axis slide being slidably mounted on the column via a horizontal guide rail mechanism, and a first linear drive mechanism being provided between the X-axis slide and the column; the Z-axis slide being slidably mounted on the X-axis slide via a vertical guide rail mechanism, and a second linear drive mechanism being provided between the Z-axis slide and the X-axis slide; a headstock assembly and a tailstock assembly for clamping workpieces are vertically aligned opposite each other on the Z-axis slide; a horizontally rotatable grinding wheel is provided at the upper end of the grinding wheel assembly, and the two sides of the grinding wheel protrude relative to the grinding wheel assembly towards the corresponding feed mechanisms.

[0007] In the above structure, the grinding wheel assembly is positioned in the middle of the bed, and a set of feed mechanisms is set on each side of the grinding wheel assembly. This allows the grinding wheel on the grinding wheel assembly to simultaneously perform external cylindrical grinding on the workpieces on the two feed mechanisms, greatly improving processing efficiency. The workload of two traditional external cylindrical grinding machines can be completed on a single external cylindrical grinding machine. Compared with traditional grinding machines, it saves the overall floor space of the bed, improves the input-output ratio per unit area, and helps reduce costs. In addition, the headstock assembly and tailstock assembly are arranged vertically opposite each other, so that the workpiece is clamped vertically, thereby avoiding the bending moment generated by the weight of the workpiece from affecting the grinding accuracy and helping to ensure machining accuracy.

[0008] Furthermore, the horizontal guide rail mechanism includes a supporting guide rail disposed on the top of the column and an auxiliary guide rail disposed on the front side of the column; the upper end of the X-axis slide plate has a supporting block protruding towards the column, and the bottom of the supporting block is mounted on the slider of the supporting guide rail; the lower end of the X-axis slide plate is mounted on the slider of the auxiliary guide rail on the side facing the column.

[0009] In this way, the protruding support block forms a "7" shaped structure. A support guide rail is set between the bottom of the support block and the top of the column, so that the weight of the feed mechanism is mainly applied to the column through the support block. This can greatly improve the service life of the auxiliary guide rail and the support guide rail, and also improve the overall rigidity of the feed mechanism, which is conducive to ensuring grinding accuracy.

[0010] Furthermore, the X-axis slide plate has two vertically extending guide blocks protruding from the side opposite to the column. The vertical guide rail mechanism includes two vertical guide rails disposed on the guide blocks, with the two vertical guide rails located on opposite sides of the two guide blocks. The Z-axis slide plate has support blocks protruding towards the X-axis slide plate on both sides in the lateral direction, with the opposite sides of the two support blocks respectively mounted on the sliders of the corresponding vertical guide rails.

[0011] In this way, the two support blocks of the Z-axis slide form a "[" shape, which on the one hand can wrap the two vertical guide rails inside, so that the guide rails are in a relatively closed space, which is conducive to improving the working environment of the guide rails; on the other hand, it can make the force applied by the Z-axis slide be in the sliding direction and width direction of the slider, avoiding the flipping of the Z-axis slide, thereby ensuring the reliable movement of the Z-axis slide.

[0012] Furthermore, the Z-axis slide plate has a vertically extending mounting platform protruding from the side opposite to the X-axis slide plate, and the mounting platform has a relatively protruding mounting surface; the head frame assembly and the tail frame assembly are mounted on the mounting surface.

[0013] By placing the mounting surface relatively prominently on the mounting platform, the flatness and surface roughness of the mounting surface can be guaranteed, which is beneficial to ensuring the clamping accuracy of the head frame assembly and tail frame assembly.

[0014] Furthermore, the tailstock assembly includes a track plate vertically mounted on the Z-axis slide plate, on which the tailstock is slidably mounted via a vertically arranged tailstock guide rail mechanism, and a third linear drive mechanism is provided between the tailstock and the track plate.

[0015] Furthermore, a protruding mounting block is provided vertically in the middle of the track plate, and the tailstock guide rail mechanism includes two tailstock guide rails provided on both sides of the mounting block; both sides of the tailstock in the lateral direction have track blocks protruding towards the track plate, and the opposite sides of the two track blocks are respectively mounted on the sliders of the two tailstock guide rails.

[0016] Furthermore, the tailstock has a vertically extending mounting hole; the third linear drive mechanism includes a lead screw passing through the mounting hole, and a nut on the lead screw is fixed to the mounting hole; the upper end of the lead screw is connected to a clamping drive mechanism, and the clamping drive mechanism is fixed to the track plate.

[0017] Furthermore, the clamping drive mechanism includes a reducer mounted on the track plate via a bracket, the output end of the reducer being coaxially connected to the lead screw, and the input end being connected to a clamping motor.

[0018] Furthermore, the grinding wheel assembly includes a grinding wheel base, within which a vertically arranged grinding wheel frame is provided, and the grinding wheel is mounted on the grinding wheel shaft of the grinding wheel frame.

[0019] Furthermore, the first linear drive mechanism and the second linear drive mechanism are lead screw and nut mechanisms, and a drive motor is connected to the lead screw and nut mechanism; a dressing motor is installed on the side of the feed mechanism facing the grinding wheel, and a dressing wheel is installed on the output shaft of the dressing motor.

[0020] In summary, this utility model has the advantages of reasonable structural design, improved processing efficiency, and improved grinding accuracy. Attached Figure Description

[0021] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of this embodiment.

[0022] Figure 3 This is a schematic diagram of the feed mechanism.

[0023] Figure 4 This is a structural schematic diagram of the tailstock assembly. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments.

[0025] In practical implementation: such as Figures 1-4 As shown, a dual-station vertical cylindrical grinding machine includes a bed 1 and a column 2 vertically mounted on the bed 1. The column 2 extends along the length of the back side of the bed 1. A vertically mounted grinding wheel assembly 3 is located in the middle of the bed 1. A set of feed mechanisms 4 is provided on each side of the grinding wheel assembly 3. Each feed mechanism 4 includes a vertically mounted X-axis slide 41 and a Z-axis slide 42. The X-axis slide 41 is slidably mounted on the column 2 via a horizontal guide rail mechanism 43. A first [missing information - likely a type of gap] is provided between the X-axis slide 41 and the column 2. A linear drive mechanism (not shown in the figure) is included. The Z-axis slide plate 42 is slidably mounted on the X-axis slide plate 41 via a vertical guide rail mechanism 44. A second linear drive mechanism (not shown in the figure) is provided between the Z-axis slide plate 42 and the X-axis slide plate 41. A headstock assembly 45 and a tailstock assembly 46 for clamping workpieces are vertically aligned on the Z-axis slide plate 42. A horizontally rotatable grinding wheel 31 is provided at the upper end of the grinding wheel assembly 3. The two sides of the grinding wheel 31 protrude relative to the corresponding feed mechanism 4. Specifically, the grinding wheel assembly 3 includes a grinding wheel base 32, which has a vertically arranged grinding wheel frame. The grinding wheel 31 is mounted on the grinding wheel shaft of the grinding wheel frame. A dressing motor 5 is mounted on the side of one of the feed mechanisms 4 facing the grinding wheel 31, and a dressing wheel is mounted on the output shaft of the dressing motor 5.

[0026] The horizontal guide rail mechanism 43 includes a supporting guide rail 431 disposed on the top of the column 2 and an auxiliary guide rail 432 disposed on the front side of the column 2; the upper end of the X-axis slide plate 41 has a supporting block 411 protruding towards the column 2, and the bottom of the supporting block 411 is mounted on the slider of the supporting guide rail 431; the lower end of the X-axis slide plate 41 is mounted on the slider of the auxiliary guide rail 432 on the side facing the column 2. Thus, the protruding supporting block forms a "7"-shaped structure and hangs on the column, such as... Figure 2 and Figure 3 As shown, the weight of the feed mechanism is applied to the support rail 431 through the front of the protruding support block, and is ultimately borne by the column, which reduces the lateral load on the guide rail. This greatly improves the service life of the auxiliary guide rail and the support rail, and also improves the overall rigidity of the feed mechanism, which is beneficial to ensuring grinding accuracy.

[0027] The X-axis slide plate 41 has two vertically extending guide blocks 412 protruding from the side opposite to the column 2. The vertical guide rail mechanism 44 includes two vertical guide rails mounted on the guide blocks 412, with the two vertical guide rails located on opposite sides of the two guide blocks 412. The Z-axis slide plate 42 has support blocks 421 protruding towards the X-axis slide plate 41 on both sides in the lateral direction. The opposite sides of the two support blocks 421 are respectively mounted on the sliders of the corresponding vertical guide rails. The Z-axis slide plate 42 has a vertically extending mounting platform 422 protruding from the side opposite to the X-axis slide plate 41. The mounting platform 422 has relatively protruding mounting surfaces. The head frame assembly 45 and the tail frame assembly 46 are mounted on the mounting surfaces.

[0028] The two support blocks of the Z-axis slide are shaped like an "[". This serves two purposes: firstly, it encloses the two vertical guide rails, placing them in a relatively enclosed space, which helps ensure a better working environment for the guide rails; secondly, it ensures that the force applied by the Z-axis slide is concentrated in both the sliding and width directions of the slider, preventing the Z-axis slide from flipping over and thus guaranteeing reliable movement. Furthermore, the mounting surface is positioned relatively prominently on the mounting platform, ensuring its flatness and surface roughness, which helps guarantee the clamping accuracy of the headstock and tailstock assemblies.

[0029] like Figure 4 As shown, the tailstock assembly 46 includes a track plate 461 vertically mounted on the Z-axis slide plate 42. A tailstock 463 is slidably mounted on the track plate 461 via a vertically arranged tailstock guide rail mechanism 462. A third linear drive mechanism 464 is provided between the tailstock 463 and the track plate 461.

[0030] In this embodiment, the tailstock 463 has a vertically extending mounting hole; the third linear drive mechanism 464 includes a lead screw passing through the mounting hole, and a nut on the lead screw is fixed to the mounting hole; the upper end of the lead screw is connected to a clamping drive mechanism, which is fixed to the track plate 461; the clamping drive mechanism includes a reducer mounted on the track plate 461 via a bracket, the output end of the reducer is coaxially connected to the lead screw, and the input end is connected to a clamping motor. A protruding mounting block extends vertically from the center of the track plate 461; the tailstock guide rail mechanism 462 includes two tailstock guide rails disposed on both sides of the mounting block; the tailstock 463 has track blocks protruding towards the track plate 461 on both sides in the lateral direction, and the opposite sides of the two track blocks are respectively mounted on the sliders of the two tailstock guide rails.

[0031] In specific implementation, the first linear drive mechanism and the second linear drive mechanism can be a lead screw and nut mechanism, or a cylinder or hydraulic cylinder, etc.

[0032] In this embodiment, the grinding wheel assembly is positioned in the middle of the machine bed, and a set of feed mechanisms is provided on each side of the grinding wheel assembly. This allows the grinding wheel on the grinding wheel assembly to simultaneously perform external cylindrical grinding on the workpieces on the two feed mechanisms, greatly improving processing efficiency. The workload of two traditional external cylindrical grinding machines can be completed on a single external cylindrical grinding machine. Compared to traditional grinding machines, this saves on the overall floor space of the machine bed, increases the input-output ratio per unit area, and helps reduce costs. In addition, the headstock assembly and tailstock assembly are vertically aligned, allowing the workpiece to be clamped vertically, thereby avoiding the bending moment generated by the workpiece's own weight from affecting grinding accuracy and helping to ensure machining precision.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-station vertical cylindrical grinding machine, characterized in that, The device includes a bed (1) and a column (2) vertically mounted on the bed (1). The column (2) extends along the length of the back side of the bed (1). The bed (1) has a vertically mounted grinding wheel assembly (3) in the middle. Each side of the grinding wheel assembly (3) is provided with a set of feed mechanisms (4). The feed mechanism (4) includes a vertically mounted X-axis slide (41) and a Z-axis slide (42). The X-axis slide (41) is slidably mounted on the column (2) via a horizontal guide rail mechanism (43). A space is provided between the X-axis slide (41) and the column (2). A first linear drive mechanism is provided; the Z-axis slide plate (42) is slidably mounted on the X-axis slide plate (41) via a vertical guide rail mechanism (44); a second linear drive mechanism is provided between the Z-axis slide plate (42) and the X-axis slide plate (41); a headstock assembly (45) and a tailstock assembly (46) for clamping workpieces are vertically arranged opposite each other on the Z-axis slide plate (42); the upper end of the grinding wheel assembly (3) is provided with a horizontally rotatable grinding wheel (31), and the two sides of the grinding wheel (31) protrude relative to the grinding wheel assembly (3) towards the corresponding feed mechanism (4); The horizontal guide rail mechanism (43) includes a support guide rail (431) disposed on the top of the column (2) and an auxiliary guide rail (432) disposed on the front side of the column (2); the upper end of the X-axis slide plate (41) has a support block (411) protruding towards the column (2), and the bottom of the support block (411) is mounted on the slider of the support guide rail (431); the lower end of the X-axis slide plate (41) is mounted on the slider of the auxiliary guide rail (432) on the side facing the column (2).

2. The dual-station vertical cylindrical grinding machine as described in claim 1, characterized in that, The X-axis slide plate (41) has two vertically extending guide blocks (412) protruding from the side opposite to the column (2). The vertical guide rail mechanism (44) includes two vertical guide rails disposed on the guide blocks (412), and the two vertical guide rails are respectively located on opposite sides of the two guide blocks (412). The Z-axis slide plate (42) has support blocks (421) protruding towards the X-axis slide plate (41) on both sides in the lateral direction. The opposite sides of the two support blocks (421) are respectively mounted on the sliders of the corresponding vertical guide rails.

3. The dual-station vertical cylindrical grinding machine as described in claim 1, characterized in that, The Z-axis slide (42) is provided with a vertically extending mounting platform (422) on the side opposite to the X-axis slide (41), and the mounting platform (422) has a relatively protruding mounting surface; the head frame assembly (45) and the tail frame assembly (46) are mounted on the mounting surface.

4. The dual-station vertical cylindrical grinding machine as described in claim 1, characterized in that, The tailstock assembly (46) includes a track plate (461) vertically mounted on the Z-axis slide plate (42), and a tailstock (463) is slidably mounted on the track plate (461) via a vertically arranged tailstock guide rail mechanism (462). A third linear drive mechanism (464) is provided between the tailstock (463) and the track plate (461).

5. The dual-station vertical cylindrical grinding machine as described in claim 4, characterized in that, The track plate (461) has a protruding mounting block extending vertically in the middle. The tail frame guide rail mechanism (462) includes two tail frame guide rails arranged on both sides of the mounting block. The tail frame (463) has track blocks protruding towards the track plate (461) on both sides in the lateral direction. The opposite sides of the two track blocks are respectively mounted on the sliders of the two tail frame guide rails.

6. The dual-station vertical cylindrical grinding machine as described in claim 4, characterized in that, The tailstock (463) has a vertically through mounting hole; the third linear drive mechanism (464) includes a lead screw passing through the mounting hole, and a nut on the lead screw is fixed to the mounting hole; the upper end of the lead screw is connected to a clamping drive mechanism, and the clamping drive mechanism is fixed to the track plate (461).

7. The dual-station vertical cylindrical grinding machine as described in claim 6, characterized in that, The clamping drive mechanism includes a reducer mounted on the track plate (461) via a bracket. The output end of the reducer is coaxially connected to the lead screw, and the input end is connected to a clamping motor.

8. The dual-station vertical cylindrical grinding machine as described in claim 1, characterized in that, The grinding wheel assembly (3) includes a grinding wheel base (32), which has a vertically arranged grinding wheel frame inside, and the grinding wheel (31) is mounted on the grinding wheel shaft of the grinding wheel frame.

9. The dual-station vertical cylindrical grinding machine as described in claim 1, characterized in that, The first linear drive mechanism and the second linear drive mechanism are lead screw and nut mechanisms, and a drive motor is connected to the lead screw and nut mechanism; a dressing motor (5) is installed on the side of the feed mechanism (4) facing the grinding wheel (31), and a dressing wheel is installed on the output shaft of the dressing motor (5).

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