Spindle box movable type numerical control core rod processing machine tool
By designing a CNC mandrel machining machine tool with a movable spindle box, and adopting structures such as a tailstock, spindle box, tool post, and center rest, the machine tool achieves full-process movement and high-precision machining, solving the problems of low concentricity adjustment efficiency and low production efficiency in existing technologies, and realizing efficient and accurate mandrel machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN JINGJIA EQUIPMENT CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-17
AI Technical Summary
In the existing technology, when mandrels are processed on general horizontal machine tools, the efficiency of adjusting the concentricity between the workpiece center and the spindle rotation axis is low, the concentricity error is large, resulting in large processing errors, and the workpiece needs to be turned around and clamped again, resulting in low production efficiency.
A CNC mandrel machining machine tool with a movable spindle box was designed. It adopts a structure including a tailstock, spindle box, tool post and center rest, so as to realize the movement of the workpiece within the whole range. The spindle box moves along the slide to perform machining, avoiding manual alignment. The support position has a high degree of concentricity with the spindle, and the machining can be completed in one loading.
It improves processing accuracy and efficiency, reduces manual operation, achieves high-precision and high-efficiency mandrel processing, and reduces labor intensity.
Smart Images
Figure CN224128617U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine tool technology, and in particular to a CNC mandrel machining machine tool with a movable spindle box. Background Technology
[0002] Mandrels are components of molds used to form contour surfaces in the pressing direction within a pressed or sintered body. Mandrels require CNC machine tools for machining during the production process.
[0003] In existing technologies, traditional machining is performed on general-purpose horizontal machine tools, which has some shortcomings. For example, when the workpiece is long, adjusting the concentricity between the workpiece center and the spindle rotation axis is inefficient and results in large concentricity errors, leading to significant machining errors. Furthermore, the mandrel ends have different machining requirements, necessitating workpiece reversal and secondary clamping to complete the machining of both ends, resulting in low production efficiency. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a CNC mandrel machining machine tool with a movable spindle box, which has the advantages of high processing efficiency and precision, and completes processing in one loading, thus solving the problems mentioned in the background technology.
[0005] This utility model provides the following technical solution: a CNC mandrel machining machine tool with a movable spindle box, including a bed, a slide rail on the top of the bed, and tailstocks symmetrically slidably installed inside the slide rail. The tailstocks include a left tailstock and a right tailstock, and the ends of the left and right tailstocks are provided with center points. A spindle box is slidably installed inside the slide rail between the left and right tailstocks. A tool post is slidably installed inside the slide rail on one side of the spindle box. A center frame is slidably installed in a linear array on the other side of the spindle box. A roller bracket is slidably installed inside the slide rail between the tool post and the left tailstock.
[0006] With the above structural design, in practical applications, the tailstock, spindle box, tool post, and center rest move independently without interfering with each other, allowing for movement throughout the entire range. The spindle box moves along the slide to meet the requirements of the machining process. In actual operation, the spindle box is driven to the clamping position of the center rest before turning is performed without manual alignment, and the support position has a high degree of concentricity with the spindle.
[0007] Preferably, the spindle box includes a base and a housing. The housing is fixedly installed on the top of the base. A through groove is opened inside the housing. Rings are fixedly installed on both sides of the housing. A chuck is provided inside the ring. The axial center of the ring and the chuck corresponds to the axial center of the through groove.
[0008] With the above structural design, the spindle box can slide inside the slideway during operation, and the workpiece can be clamped by the chucks on both sides, allowing the workpiece to pass through the through slot and between the chucks.
[0009] Preferably, the central frame includes a frame body, the frame body is C-shaped in general, a workbench is fixedly installed on the bottom top wall of the frame body, pads are symmetrically fixedly installed on the top of the workbench, a fixed plate is fixedly installed on the top of the frame body, a sliding column is slidably installed inside the fixed plate, a turntable is threaded inside the fixed plate, a threaded shaft is provided at the bottom of the turntable, and the bottom of the threaded shaft is rotatably connected to the top of the sliding column.
[0010] With the above structural setup, the center frame supports the workpiece through the pad strips during actual operation. Then, the turntable is rotated, causing the bottom drive column to move up and down inside the center frame. When the column moves down, it can clamp the outer surface of the workpiece.
[0011] Preferably, the roller bracket includes a base block and a bracket. The base block is fixedly installed on the top wall of the roller bracket, and the bracket is provided above the base block. Rollers are symmetrically and rotatably installed inside the bracket. A rotating shaft is fixedly installed at the bottom of the bracket. A threaded groove is formed between the outer rings of the rotating shaft. A torsion disc is rotatably installed on the top of the base block at the outer ring of the rotating shaft. The inner ring of the torsion disc is threadedly matched with the outer ring of the rotating shaft.
[0012] With the above structural design, the roller bracket can lift the workpiece in practical applications. When the workpiece is first lifted and placed in this device, it is supported by rollers, and the position of the rotating shaft inside the bottom block can be adjusted by rotating the torsion plate.
[0013] This utility model has the following advantages:
[0014] 1. This CNC mandrel machining machine tool with a movable spindle head achieves high machining accuracy through the design of a tailstock, spindle head, and center rest. The spindle head moves to the right to the left of the first center rest, and the workpiece is clamped inside the machine housing using a chuck. The spindle head is then started to rotate the workpiece at a low speed to machine the clamping surface of the first center rest. After machining, the chuck is released, and the spindle head moves to the left, moving the second center rest to the clamping position of the first center rest. The second center rest clamps the workpiece for machining. After machining, the spindle head continues to move to the left, moving the third center rest to the clamping position of the second center rest, and then clamping it. The spindle head then performs machining. This process is repeated until the fourth workpiece clamping position is completed. After machining, the chuck is released, and the spindle head moves to the left to an appropriate position. The specific position depends on the process requirements. The leftmost extreme position is where the right side of the spindle head chuck can clamp the left end of the workpiece, achieving high machining accuracy.
[0015] 2. This CNC mandrel machining machine tool with a movable spindle box enables one-time machining of the workpiece by setting up a tailstock, spindle box, center rest, and tool post. The chuck is released, and the spindle box moves to the right until the machined outer ring is exposed on the outer end face of the chuck on the left side of the spindle box. The chuck clamps the workpiece, and the left tailstock moves to the leftmost end of the machine bed. According to the process requirements, the spindle box speed and cutting parameters are controlled by the tool post to machine the left end face, outer ring, inner hole, and internal and external threads of the workpiece. For longer workpieces, a certain length of the outer circle can be left on the left end for machining when turning the left end face. In this case, a machining method of spindle box clamping and center rest support is required. The machining method on the right side of the workpiece is the same as that on the left side but in the opposite direction, which achieves the effect of low labor intensity. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the tailstock structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the spindle box structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the central frame structure of this utility model;
[0020] Figure 5 This is a schematic diagram of the roller bracket structure of this utility model.
[0021] In the diagram: 1. Bed; 11. Slide rail; 2. Tailstock; 21. Left tailstock; 22. Right tailstock; 23. Center head; 3. Spindle box; 31. Base; 32. Housing; 33. Ring; 34. Chuck; 4. Tool post; 5. Center rest; 51. Frame; 52. Worktable; 53. Pad; 54. Fixed plate; 55. Slide column; 56. Turntable; 6. Roller bracket; 61. Base block; 62. Bracket; 63. Roller; 64. Shaft; 65. Torque plate. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figures 1-2A CNC mandrel machining machine tool with a movable spindle box includes a bed 1. A slide rail 11 is provided on the top of the bed 1. A tailstock 2 is symmetrically slidably installed inside the slide rail 11. The tailstock 2 includes a left tailstock 21 and a right tailstock 22. The ends of the left tailstock 21 and the right tailstock 22 are provided with center heads 23. A spindle box 3 is slidably installed inside the slide rail 11 between the left tailstock 21 and the right tailstock 22. A tool post 4 is slidably installed inside the slide rail 11 on one side of the spindle box 3. A center frame 5 is slidably installed in a linear array on the other side of the spindle box 3. A roller bracket 6 is slidably installed inside the slide rail 11 between the tool post 4 and the left tailstock 21.
[0024] In practical applications, the tailstock 2, spindle box 3, tool holder 4, and center support 5 move independently without interference, allowing for movement throughout their entire range. The spindle box 3 moves along the slide rail 11 to meet the requirements of the machining process. In actual operation, the workpiece is supported by the pads 53 inside the center support 5. Then, the turntable 56 is rotated to lower the end face of the slide column 55 and press it against the outer surface of the workpiece, driving the spindle box 3 to move to the clamping position of the center support 5 for turning. No manual alignment is required, and the support position has a high degree of concentricity with the spindle. This device can complete the workpiece loading and processing of all processes in one operation without the need for external lifting devices to turn it around, resulting in high processing efficiency and low labor intensity.
[0025] The bed 1 is equipped with a left tailstock 21 and a right tailstock 22 on both sides. The left tailstock 21 and the right tailstock 22 are driven to move by electric power and automatically lock and release the workpiece by hydraulic power. The tailstock 2 in this device is existing technology. The driving and locking of the tailstock 2 are not specifically described, but it does not mean that it does not have this function. The existing technology has the complete working principle of the tailstock 2.
[0026] Please see Figures 1-3 The spindle box 3 includes a base 31 and a housing 32. The housing 32 is fixedly installed on the top of the base 31. A through groove is opened inside the housing 32. Ring sleeves 33 are fixedly installed on both sides of the housing 32. A chuck 34 is provided inside the ring sleeves 33. The axis center of the ring sleeves 33 and the chuck 34 corresponds to the axis center of the through groove.
[0027] When the spindle box 3 is working, it can slide inside the slide rail 11 and clamp the workpiece through the two side chucks 34. The workpiece can pass through the inside of the through groove and between the chucks 34.
[0028] The spindle box 3 adopts a double gear rack transmission mechanism, driven by a servo motor, and hydraulically locks and releases automatically. The spindle box 3 is a mature technology in the prior art. The transmission structure and drive mechanism are not explained in detail in this device, but this does not mean that the above work cannot be performed. There are corresponding working principles in the prior art.
[0029] Please see Figures 1-4 The central frame 5 includes a frame body 51, which is C-shaped. A workbench 52 is fixedly installed on the bottom top wall of the frame body 51. Pad strips 53 are symmetrically fixedly installed on the top of the workbench 52. A fixed plate 54 is fixedly installed on the top of the frame body 51. A sliding column 55 is slidably installed inside the fixed plate 54. A turntable 56 is threaded inside the fixed plate 54. A threaded shaft is provided at the bottom of the turntable 56. The bottom of the threaded shaft is rotatably connected to the top of the sliding column 55.
[0030] This device uses multiple center frames 5 to support the workpiece. In practical applications, a hydraulic self-centering center frame can be used to replace the center frame 5 in this device to support the workpiece.
[0031] The center frame 5 can move along the inside of the slide rail 11 and is driven by a servo motor. It is automatically locked and released by hydraulic pressure, which is a common application in existing technology.
[0032] In actual operation, the center frame 5 supports the workpiece through the pad strip 53, and then rotates the turntable 56. The turntable 56 rotates through the internal thread of the fixed plate 54, causing the bottom drive slide column 55 to move up and down inside the center frame 5. When the slide column 55 moves down, it can clamp the outer surface of the workpiece.
[0033] Please see Figures 1-5 The roller bracket 6 includes a base block 61 and a bracket 62. The base block 61 is fixedly installed on the top wall of the roller bracket 6, and the bracket 62 is provided above the base block 61. Rollers 63 are symmetrically rotatably installed inside the bracket 62. A rotating shaft 64 is fixedly installed at the bottom of the bracket 62. A threaded groove is opened between the outer rings of the rotating shaft 64. A torsion plate 65 is rotatably installed on the top of the base block 61 at the outer ring of the rotating shaft 64. The inner ring of the torsion plate 65 is threaded to match the outer ring of the rotating shaft 64. By rotating the torsion plate 65, the rotating shaft 64 is driven by the thread to extend and retract vertically inside the base block 61, thereby changing the vertical position of the bracket 62.
[0034] In practical applications, the roller bracket 6 serves to lift the workpiece. When the workpiece is first lifted and placed in the device, the roller 63 is used to lift it. By rotating the torsion plate 65, the position of the rotating shaft 64 inside the base block 61 can be adjusted, so that the positions of the bracket 62 and the roller 63 are driven by the rotating shaft 64, achieving the effect of moving up and down. The bracket 62 is moved up to lift the workpiece, and the bracket 62 is moved down when the center frame 5 is used to clamp the workpiece.
[0035] Working principle: The specific process steps can be divided into: loading, clamping the workpiece, machining the workpiece, turning, threading, unloading, etc. Specifically, loading: The spindle box 3 and the right tailstock 22 are moved to the leftmost and rightmost ends of the bed 1, respectively. The center support 5 is moved to the right end of the bed. By rotating the torsion plate 65, the rotating shaft 64 drives the bracket 62 to rise. Then, a bridge crane is used to lift the workpiece and place it on the bracket 62, so that the workpiece is between the tops of the rollers 63. The bracket 62 lifts the workpiece. Clamping the workpiece: The spindle box 3 is moved to the right until the workpiece passes through the chuck 34 and the through slot. The left tailstock 21 moves to the right and pushes the workpiece to the left end face. The right tailstock 22 moves to the left and pushes the workpiece to the left end face. On the right end face, the workpiece is clamped by the left tailstock 21 and right tailstock 22. Then, the torsion disc 65 is rotated to lower the bracket 62 and roller 63. For workpiece machining: the spindle box 3 moves to the right to the left of the first center rest 5, and the chuck 34 clamps the workpiece inside the machine housing. The spindle box 3 is started to rotate the workpiece at a low speed to machine the clamping surface of the first center rest 5. After machining, the chuck 34 is released, and the spindle box 3 moves to the left, moving the second center rest 5 to the clamping position of the first center rest 5. The second center rest 5 clamps the workpiece for machining. After machining, the spindle box 3 continues to move to the left, moving the third center rest 5 to the clamping position of the second center rest 5, and then clamping it. The spindle box 3 is machined, and the above steps are repeated until the fourth workpiece clamping position is completed. After the chuck 34 is released, the spindle box 3 moves to the left to an appropriate position. The specific position depends on the process requirements. The leftmost extreme position is that the right side chuck 34 of the spindle box 3 can clamp the left end of the workpiece. Turning: The outer ring of the workpiece is turned according to the spindle box 3 speed and cutting parameters required by the user's process. Threading: Left side machining: The chuck 34 is released, and the spindle box 3 moves to the right until the machined outer ring is exposed on the outer end face of the left side chuck 34 of the spindle box 3. The chuck 34 clamps the workpiece, and the left tailstock 21 moves to the leftmost end of the bed 1. The spindle box 3 speed and cutting parameters are used according to the process requirements. The tool holder 4 processes the left end face, outer ring, inner hole, and internal and external threads of the workpiece. For longer workpieces, a certain length of the outer circle can be left for processing when machining the left end face. In this case, the machining method of clamping with the spindle box 3 and supporting with the center frame 5 is required. The machining method on the right side of the workpiece is the same as that on the left side, but in the opposite direction. Unloading: Drive the chuck 34 to release the workpiece, rotate the turntable 56 to move the bottom end of the slide column 55 upward. The workpiece is in an unrestricted state at this time. Then rotate the torsion plate 65 to raise the bracket 62 and the roller 63 to support the workpiece. The spindle box 3 and the left tailstock 21 move to the leftmost end, so that the workpiece is exposed on the right side of the chuck 34 of the spindle box 3. Use a bridge crane to remove the workpiece from this device.
Claims
1. A main spindle box mobile numerical control mandrel processing machine tool, comprising a bed body (1), characterized in that: The top of the bed (1) is provided with a slide rail (11), and a tailstock (2) is symmetrically slidably installed inside the slide rail (11). The tailstock (2) includes a left tailstock (21) and a right tailstock (22). The ends of the left tailstock (21) and the right tailstock (22) are provided with a center head (23). A spindle box (3) is slidably installed inside the slide rail (11) between the left tailstock (21) and the right tailstock (22). A tool holder (4) is slidably installed inside the slide rail (11) on one side of the spindle box (3). A center frame (5) is slidably installed in a linear array on the other side of the spindle box (3). A roller bracket (6) is slidably installed inside the slide rail (11) between the tool holder (4) and the left tailstock (21).
2. The mobile die sinking machine according to claim 1, characterized in that: The spindle box (3) includes a base (31) and a housing (32). The housing (32) is fixedly installed on the top of the base (31). A through groove is provided inside the housing (32). Ring sleeves (33) are fixedly installed on both sides of the housing (32). A chuck (34) is provided inside the ring sleeves (33). The axial center of the ring sleeves (33) and the chuck (34) corresponds to the axial center of the through groove.
3. The mobile die sinking machine according to claim 2, characterized in that: The central frame (5) includes a frame body (51), which is C-shaped in general. A workbench (52) is fixedly installed on the bottom top wall of the frame body (51). A pad strip (53) is symmetrically fixedly installed on the top of the workbench (52). A fixed plate (54) is fixedly installed on the top of the frame body (51). A sliding column (55) is slidably installed inside the fixed plate (54). A turntable (56) is threaded inside the fixed plate (54). A threaded shaft is provided at the bottom of the turntable (56). The bottom of the threaded shaft is rotatably connected to the top of the sliding column (55).
4. The mobile die sinking machine tool according to claim 3, characterized in that: The roller bracket (6) includes a base block (61) and a bracket (62). The base block (61) is fixedly installed on the top wall of the roller bracket (6). The bracket (62) is provided above the base block (61). Rollers (63) are symmetrically installed inside the bracket (62). A rotating shaft (64) is fixedly installed at the bottom of the bracket (62). A threaded groove is provided between the outer rings of the rotating shaft (64). A torsion plate (65) is rotatably installed on the top of the base block (61) at the outer ring of the rotating shaft (64). The inner ring of the torsion plate (65) is threadedly matched with the outer ring of the rotating shaft (64).