High-precision numerical control machine tool

Abstract

The utility model discloses a high-precision numerical control machine tool which comprises a machine tool body, a guide rail arranged on the machine tool body and a tailstock assembly arranged on the guide rail. The tailstock assembly comprises a bottom plate installed on the guide rail in a sliding mode, a tailstock frame fixedly connected with the bottom, a locking plate located below the bottom plate and a locking mechanism driving the locking plate. The locking mechanism comprises a crankshaft with the axis arranged in the length direction of the guide rail, two pull rods which are arranged in the length direction of the locking plate at intervals and penetrate through the bottom plate, a trigger piece fixedly connected with one end of the crankshaft, and a ring sleeve fixedly connected to the upper ends of the pull rods and rotationally arranged on the crankshaft in a sleeving mode. The crankshaft is rotationally mounted on the tailstock frame; when the crankshaft is rotated, the two pull rods synchronously move up and down. The utility model has the advantages that the problem of non-uniform distribution of locking force possibly caused by the traditional single-point driving is avoided, so that the overall uniformity and reliability of the locking force are obviously improved, and the stability and the machining precision of a workpiece in the use process are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to machining equipment technical field, especially a kind of high-precision numerical control machine tool. BACKGROUND

[0002] Numerical control machine tool is a kind of machine tool equipment widely used in mechanical manufacturing industry, the main feature of numerical control lathe among them is that its main shaft and tool are located on the same horizontal line, such design makes machine tool can be more conveniently to workpiece radial and axial cutting operation in the operation process, greatly improves processing efficiency and precision. In order to adapt to the processing needs of large workpiece, numerical control lathe is usually equipped with tailstock, this tailstock can effectively support long workpiece in the processing process, prevent the bending or vibration caused by workpiece too long, so as to affect the processing quality. At the same time, numerical control lathe has larger bearing capacity, which not only enables it to carry heavy workpiece, but also ensures the smooth completion of large-size workpiece processing task under the requirement of high precision. For oversized workpiece, tailstock can be adjusted by increasing the base to meet the processing requirements of different heights, and is equipped with a special locking mechanism to fix the position of tailstock, to ensure the stability in the processing process. The locking mode of existing tailstock is prone to uneven locking force distribution, which will affect the machining accuracy of workpiece, so the locking mode of tailstock still needs to be further improved. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a high-precision numerical control machine tool.

[0004] In order to solve the above technical problems, the technical scheme of the utility model is as follows:

[0005] A high-precision numerical control machine tool, comprising a bed, a guide rail arranged on the bed, and a tailstock assembly arranged on the guide rail; the tailstock assembly comprises a bottom plate slidingly mounted on the guide rail, a tailstock frame fixed to the bottom, a locking plate located below the bottom plate, and a locking mechanism for driving the locking plate; the locking mechanism comprises a crankshaft with its axis arranged along the length direction of the guide rail, two pull rods arranged along the length direction of the locking plate and penetrating through the bottom plate, a handle fixed to one end of the crankshaft, and a ring sleeve fixed to the upper end of the pull rod and rotatably sleeved on the crankshaft; the crankshaft is rotatably mounted on the tailstock frame; when the crankshaft is rotated, the two pull rods move up and down synchronously.

[0006] Preferably, a limiting pin for limiting the rotation progress of the handle is fixed to the bed.

[0007] Preferably, a lower support block protruding upward is fixed to the bottom plate, and a lower groove for the crankshaft to pass through is arranged at the upper end of the lower support block; an upper support block corresponding to the lower support block is arranged in the tailstock frame, and an upper groove corresponding to the lower groove is arranged at the upper end of the upper support block.

[0008] Preferably, the lower end of the tailstock is provided with a positioning groove, and the upper end of the bottom plate is provided with a positioning protrusion matched with the positioning groove.

[0009] Preferably, the lathe bed further comprises a cooling liquid collecting tray, and the lower part of the lathe bed is provided with two symmetrical guide grooves, and two sides of the cooling liquid collecting tray are respectively slidably installed on the guide grooves of the corresponding sides.

[0010] The above technical scheme has the following advantages:

[0011] 1. The utility model discloses a crankshaft synchronous drive two pull rods for lifting movement, and then indirectly drive the up-down movement of the locking plate to realize the locking function. The two pull rods of the utility model are arranged along the length direction of the locking plate, and such a layout mode can effectively distribute the pulling force evenly on the locking plate, avoids the uneven distribution of locking force caused by the traditional single-point drive, thereby significantly improving the overall uniformity and reliability of the locking force, and ensuring the stability and machining precision of the workpiece in the use process. In addition, another advantage of the utility model lies in the simple operation. When locking or opening the locking plate, the operator only needs to rotate the crankshaft once to complete the whole action, without repeated operation, which greatly improves the work efficiency and reduces the failure rate in the operation steps, making the whole locking process fast and convenient.

[0012] 2. The utility model discloses a crankshaft synchronous drive two pull rods for lifting movement, and then indirectly drive the up-down movement of the locking plate to realize the locking function. The two pull rods of the utility model are arranged along the length direction of the locking plate, and such a layout mode can effectively distribute the pulling force evenly on the locking plate, avoids the uneven distribution of locking force caused by the traditional single-point drive, thereby significantly improving the overall uniformity and reliability of the locking force, and ensuring the stability and machining precision of the workpiece in the use process. In addition, another advantage of the utility model lies in the simple operation. When locking or opening the locking plate, the operator only needs to rotate the crankshaft once to complete the whole action, without repeated operation, which greatly improves the work efficiency and reduces the failure rate in the operation steps, making the whole locking process fast and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the front view of the utility model, and partial section is carried out therein;

[0014] Figure 2 It is the front view of the utility model, and partial section is carried out therein; Figure 1 It is the enlarged view of A part in the utility model;

[0015] Figure 3 It is the right view of the utility model; Figure 1

[0016] ​Figure 4 is Figure 3 enlarged view of part B in the figure;

[0017] Figure 5 is Figure 1 rear view;

[0018] Figure 6 is Figure 1 top view;

[0019] Figure 7 is Figure 1 perspective view;

[0020] Figure 8 is an enlarged view of part C in the figure;

[0021] Figure 9 is a perspective enlarged view of the bottom plate;

[0022] in the figure:

[0023] 1 - bed, 2 - guide rail, 3 - bottom plate, 4 - tailstock frame, 5 - locking plate, 6 - crankshaft, 7 - pull rod, 8 - handle, 9 - ring sleeve, 10 - limit pin, 11 - lower support block, 12 - lower groove, 13 - upper support block, 14 - positioning groove, 15 - positioning protrusion, 16 - cooling liquid collection disc, 17 - guide groove. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be further described with reference to the drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] As shown in the drawings, a high-precision numerical control machine tool comprises a bed 1, a guide rail 2 arranged on the bed 1, and a tailstock assembly arranged on the guide rail 2; the tailstock assembly comprises a bottom plate 3 slidingly mounted on the guide rail 2, a tailstock frame 4 fixed to the bottom, a locking plate 5 located below the bottom plate 3, and a locking mechanism for driving the locking plate 5; the locking mechanism comprises a crankshaft 6 arranged along the length direction of the guide rail 2, two pull rods 7 arranged along the length direction of the locking plate 5 and penetrating through the bottom plate 3, a handle 8 fixed to one end of the crankshaft 6, and a ring sleeve 9 fixed to the upper end of the pull rod 7 and rotatably sleeved on the crankshaft 6; the hole diameter of the sleeve ring 9 is larger than the diameter of the connection between the sleeve ring 9 and the crankshaft 6, so as to ensure that the pull rod 7 moves vertically without deflection; the crankshaft 6 is rotatably mounted on the tailstock frame 4; when the crankshaft 6 is rotated, the two pull rods 7 move up and down synchronously.

[0026] As a further improved technical solution of the embodiment, the bed body 1 is fixedly connected with a limiting pin 10 for limiting the rotation progress of the handle 8, and when the handle 8 is in contact with the limiting pin 10, the locking position of the locking plate 5 is limited, that is, when the handle 8 is in contact with the limiting pin 10, the pull rod 6 moves upward to drive the locking plate 5 to contact the lower edge of the guide rail 2 to realize locking. By arranging the limiting pin 10, the locking force of the locking plate 5 can meet the use requirement, and the locking force is prevented from being too large or insufficient.

[0027] As a further improved technical solution of the embodiment, the bottom plate 3 is fixedly connected with a downward extending lower support block 11, and the upper end of the lower support block 11 is provided with a lower groove 12 for the crankshaft 6 to pass through; the tail seat frame 4 is provided with an upper support block 13 corresponding to the lower support block 11, and the upper end of the upper support block 13 is provided with an upper groove (not shown in the figure) corresponding to the lower groove 12. By arranging the lower support block 11 and the middle support block 13, the rotation of the crankshaft 6 can be effectively supported, the stability of the crankshaft 6 is improved, and the locking force is prevented from being weakened due to deformation of the crankshaft 6.

[0028] As a further improved technical solution of the embodiment, the lower end of the tail seat frame 4 is provided with a positioning groove 14, and the upper end of the bottom plate 3 is provided with a positioning protrusion 15 matched with the positioning groove 14. The relative position of the tail seat frame 4 and the bottom plate 3 can be quickly positioned, and the assembly precision and efficiency are improved. The tail seat frame 4 and the bottom plate 3 can be connected by bolts, and by replacing the bottom plate 3 with different thicknesses, the height of the tail seat frame 4 can be quickly adjusted.

[0029] As a further improved technical solution of the embodiment, it further comprises a cooling liquid collecting disc 16, and the lower part of the bed body 1 is provided with two symmetrical guide grooves 17, and the two sides of the cooling liquid collecting disc 16 are respectively slidably installed on the corresponding side guide grooves 17. The cooling liquid collecting disc 16 can be pulled out for easy cleaning and maintenance of the cooling liquid collecting disc 16.

[0030] The utility model adopts the crankshaft 6 to drive two pull rods 7 to move synchronously, can ensure that two pull rods 7 always keep synchronization when executing lifting action, thereby effectively guarantee the consistency of the force of two pull rods 7 in the working process. Because two pull rods 7 can keep the same force state in the whole movement process, this makes them can evenly transmit the force to the locking plate 5 when driving the locking plate 5 to lift, and further ensures that the locking force applied by the locking plate 5 when locking the workpiece has high uniformity. This uniform locking force distribution not only can enhance the stability and reliability of the whole system, but also can significantly improve the precision control in the machining process, and avoid the problems of workpiece deviation or deformation caused by uneven local force.

[0031] The embodiments of the present application are described in detail in combination with the drawings, but the present application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the present application, and still fall within the protection scope of the present application.

Claims

1. A high-precision CNC machine tool, comprising a bed (1), a guide rail (2) disposed on the bed (1), and a tailstock assembly disposed on the guide rail (2); the tailstock assembly comprises a base plate (3) slidably mounted on the guide rail (2), a tailstock frame (4) fixedly connected to the bottom, a locking plate (5) located below the base plate (3), and a locking mechanism for driving the locking plate (5); characterized in that: The locking mechanism includes a crankshaft (6) with its axis along the length of the guide rail (2), two pull rods (7) spaced apart along the length of the locking plate (5) and penetrating the base plate (3), a lever (8) fixed to one end of the crankshaft (6), and a ring sleeve (9) fixed to the upper end of the pull rod (7) and rotatably fitted onto the crankshaft (6); the crankshaft (6) is rotatably mounted on the tailstock frame (4); when the crankshaft (6) is rotated, the two pull rods (7) move up and down synchronously.

2. The high-precision CNC machine tool according to claim 1, characterized in that: A limiting pin (10) is fixedly connected to the bed (1) to limit the rotation progress of the lever (8).

3. The high-precision CNC machine tool according to claim 1 or 2, characterized in that: A lower support block (11) extending upward is fixed to the base plate (3). The upper end of the lower support block (11) is provided with a lower groove (12) through which the crankshaft (6) passes. An upper support block (13) corresponding to the lower support block (11) is provided in the tailstock frame (4). The upper end of the upper support block (13) is provided with an upper groove corresponding to the lower groove (12).

4. The high-precision CNC machine tool according to claim 1 or 2, characterized in that: The lower end of the tailstock frame (4) is provided with a positioning groove (14), and the upper end of the base plate (3) is provided with a positioning protrusion (15) that cooperates with the positioning groove (14).

5. The high-precision CNC machine tool according to claim 3, characterized in that: The lower end of the tailstock frame (4) is provided with a positioning groove (14), and the upper end of the base plate (3) is provided with a positioning protrusion (15) that cooperates with the positioning groove (14).

6. The high-precision CNC machine tool according to claim 1 or 2, characterized in that: It also includes a coolant collection tray (16), and two symmetrical guide grooves (17) are provided on the lower part of the bed (1). The two sides of the coolant collection tray (16) are slidably installed on the guide grooves (17) on the corresponding sides.

7. The high-precision CNC machine tool according to claim 3, characterized in that: It also includes a coolant collection tray (16), and two symmetrical guide grooves (17) are provided on the lower part of the bed (1). The two sides of the coolant collection tray (16) are slidably installed on the guide grooves (17) on the corresponding sides.

8. The high-precision CNC machine tool according to claim 4, characterized in that: It also includes a coolant collection tray (16), and two symmetrical guide grooves (17) are provided on the lower part of the bed (1). The two sides of the coolant collection tray (16) are slidably installed on the guide grooves (17) on the corresponding sides.

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