Lathe center frame self-centering device
Through the cooperation of V-type components and hydraulic cylinders, the lathe center frame can be quickly and accurately centered, which solves the problem of time-consuming and labor-intensive adjustment of traditional center frames, improves the centering speed and accuracy, and reduces costs.
Patent Information
- Application Number
- CN202422874047.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-22
AI Technical Summary
The traditional lathe center frame centering structure is time-consuming and labor-intensive to adjust, with slow adjustment speed, poor precision, and high cost, making it difficult to meet the needs of fast and accurate centering.
The V-type assembly and hydraulic cylinder are used to achieve precise centering of two points through one position adjustment, which is simplified to the bolt height adjustment action, reducing operation time and labor intensity, and providing the possibility of automated operation.
It significantly improves the centering speed and accuracy, simplifies the adjustment process, reduces maintenance costs, improves work efficiency, and makes components easy to replace and maintain.
Smart Images
Figure CN223394820U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lathe processing auxiliary equipment, in particular to a lathe center frame self-centering device. Background Art
[0002] Machining slender shafts is a challenge during lathe machining. Due to their large aspect ratio and poor rigidity, slender shafts are prone to bending and deformation during machining, ultimately affecting dimensional accuracy and part surface roughness.
[0003] To solve the above problems, the lathe center frame centering structure is usually used. The lathe center frame centering structure is a device installed on the lathe guide rail, usually installed in the middle position of the workpiece to prevent the workpiece from bending or vibrating due to its own weight or cutting force during processing. The structure adjusts the three support grips to make them contact with the outer cylindrical surface of the workpiece, and uses measuring tools such as micrometers to align the workpiece's rotation center with the lathe spindle's rotation center as much as possible. When the lathe drives the workpiece to rotate, the adjusted three support grips can limit the workpiece's movement in directions other than rotation, ensuring that the workpiece rotates stably around the spindle center line, thereby ensuring the concentricity of the workpiece.
[0004] The traditional center frame centering structure consists of a main frame and three independent support rollers. When in use, the rotating screws need to be manually adjusted one by one to change the position of the rollers, and the relative position needs to be determined repeatedly back and forth for further fine-tuning. The adjustment process is time-consuming and labor-intensive, the adjustment speed is slow, and the adjustment accuracy is poor. At the same time, the traditional center frame is relatively expensive. Utility Model Content
[0005] The utility model is intended to provide a self-centering device for a lathe center frame, which not only realizes fast and accurate centering, but also significantly improves work efficiency and reduces maintenance costs by simplifying the adjustment process and using standardized components. It has the advantages of simple structure and low cost, and is suitable for various lathe processing centering occasions.
[0006] The basic solution provided by the utility model is: a lathe center frame self-centering device, comprising a main base, an auxiliary support assembly and an auxiliary limit assembly; the auxiliary support assembly comprises an upper support member, a left support member and a right support member having the same main structure; the auxiliary limit assembly comprises an upper bolt, a lower bolt, a locking nut, a V-shaped assembly and two positioning members;
[0007] The main base is provided with a central hole, and four slide rails are provided along the circumference and coplanarity of the central hole, namely an upper slide rail and a lower slide rail located on the center line of the main base, and a left slide rail and a right slide rail symmetrically arranged on both sides of the lower rail; a stopper is fixedly installed at the upper end of the upper slide rail and the lower end of the lower slide rail, and a threaded hole is provided in the center of the stopper;
[0008] The upper support member, the left support member, the right support member and the V-shaped assembly all have bosses, which are slidably connected to the upper slide rail, the left slide rail, the right slide rail and the lower slide rail respectively through the bosses;
[0009] The two positioning members are installed on the main base and are symmetrical on both sides of the upper support member. The upper bolt passes through the threaded hole of the stopper of the upper slide rail. The upper support member is limited by the cooperation of the upper bolt and the two positioning members.
[0010] The locking nut is located below the stopper of the lower rail, and the lower bolt passes through the locking nut and the threaded hole of the stopper of the lower rail in sequence, so that the lower bolt spirally contacts the V-shaped assembly when it moves up and down, driving the V-shaped assembly to move up and down, and is locked and limited by the locking nut after moving into place; the left support and the right support are both provided with through grooves, and the V-shaped angle of the V-shaped assembly is assembled through the through grooves on the left support and the right support, so that when the V-shaped assembly moves up and down, it drives the left support and the right support to move synchronously, and the V-shaped angle of the V-shaped assembly is always in the through groove during movement.
[0011] The working principle and advantages of this utility model are as follows: after the workpiece is loaded, it passes through the center hole of the main base, the main base is adjusted to the appropriate position, and the main base is fixed to the lathe guide rail; the outer circle of the workpiece is aligned by dialing, and the height of the spirally rotating lower bolt is adjusted to drive the V-shaped assembly, the left support member, and the right support member to move upward simultaneously, while dialing and adjusting, and finally the workpiece reaches the center position of the machine tool. After it is in place, the lower bolt is locked with the locking nut. The positioning bolt is loosened, and the upper support member slides freely to contact the workpiece. The spirally rotating upper bolt locks the upper support member, thereby achieving the centering support function of the workpiece. This device can adjust the lower bolt to adapt to the centering of workpieces within the diameter range of d1-d2.
[0012] Compared with existing technologies, this device changes the centering concept of the original device. By introducing a V-shaped component, only one position needs to be adjusted to achieve precise centering of two points simultaneously. While maintaining the accuracy of the traditional three-point centering method, the number of points that need to be adjusted is reduced, and the centering adjustment action is simplified to a single bolt rotation action, which significantly simplifies the adjustment process, reduces operation time and labor intensity, and thus significantly improves adjustment efficiency. At the same time, the bolt height adjustment action also provides the possibility of an automated operation mode. The hydraulic cylinder is used to connect the lower bolt, and the hydraulic cylinder automatically pushes the lower bolt to achieve height adjustment, which is more effective, more labor-saving, and simpler. The design of the V-shaped component and the left and right supports allows the workpiece to be quickly aligned with the center position of the machine tool in a single adjustment, greatly improving the speed and accuracy of centering.
[0013] All components of this device are self-made and standard parts. This design not only makes the manufacture and procurement of components more convenient, but also greatly simplifies the maintenance and replacement process. When a component is damaged, a replacement can be quickly found and replaced without complicated maintenance operations, thus ensuring the reliability and durability of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A schematic diagram of the structure of a lathe center frame self-centering device provided by the embodiment of the utility model Figure 1 ;
[0015] Figure 2 A schematic diagram of the structure of a lathe center frame self-centering device provided by an embodiment of the utility model Figure 2 ;
[0016] Figure 3 A schematic structural diagram of the main base provided in an embodiment of the present utility model;
[0017] Figure 4 A schematic structural diagram of a V-shaped assembly provided in an embodiment of the present utility model;
[0018] Figure 5 A schematic structural diagram of a side support member provided by an embodiment of the present utility model;
[0019] Figure 6 This is a schematic structural diagram of the upper support member provided in an embodiment of the present utility model. DETAILED DESCRIPTION
[0020] The following is a further detailed description through specific implementation methods:
[0021] The marks in the drawings of the specification include: main base 1, center hole 11, upper slide rail 12, upper stop 121, lower slide rail 13, lower stop 131, locking nut 132, left slide rail 14, right slide rail 15, positioning hole 16, V-shaped groove 17, lower bolt 2, V-shaped assembly 3, side support 4, through groove 41, upper support 5, upper bolt 6, positioning nut 7, positioning bolt 8, boss 9, roller 10.
[0022] The embodiment is basically as shown in the attached Figure 1 and Figure 2 As shown: A lathe center frame self-centering device includes a main base 1, an auxiliary support assembly and an auxiliary limit assembly; the auxiliary support assembly includes an upper support member 5 and side supports 4 (i.e., a left support member and a right support member) with the same main structure; the auxiliary limit assembly includes an upper bolt 6, a lower bolt 2, a locking nut 132 and a V-shaped assembly 3. Figure 1 The state shown is suitable for centering workpieces with a maximum diameter d1 ( Figure 1 (a) is the front view, Figure 1(b) is the left view, Figure 1 (c) is a left sectional view), Figure 2 The state shown is suitable for centering workpieces with a minimum diameter d2 ( Figure 2 (a) is the front view, Figure 2 (b) is a left view); in other embodiments, the centering of workpieces with a diameter within the range of d1-d2 can be adapted by adjusting the lower bolt.
[0023] like Figure 3 As shown, Figure 3 (a) is a main view of the main base 1, (b) is an AA sectional view in (a), and (c) is a BB sectional view in (a). The main base 1 has a central hole 11, and four slide rails are opened along the circumference and coplanarity of the central hole 11, namely an upper slide rail 12 and a lower slide rail 13 located on the center line of the main base 1, and a left slide rail 14 and a right slide rail 15 symmetrically arranged on both sides of the lower rail. In this embodiment, Figure 3 As shown in (c), the slide rail is a T-slot; the left slide rail 14 and the right slide rail 15 are located in the lower semicircle of the center hole 11; the top end of the lower slide rail 13 is located below the top end of the left slide rail 14 and the right slide rail 15 to ensure that the corresponding components will not fall off the slide rail during subsequent moving operations.
[0024] The upper end of the upper slide rail 12 and the lower end of the lower slide rail 13 are fixedly mounted with blocks, namely an upper block 121 and a lower block 131 . A threaded hole is opened in the center of the block, and the block is welded to the main base 1 .
[0025] The bottom of the main base 1 is provided with a positioning hole 16 and a V-shaped groove 17 for positioning the main base 1 on the lathe; in this embodiment, there is one V-shaped groove 17, which is used for positioning on the guide rail of the CW61100 lathe, and there are two positioning holes 16, Figure 3 As shown in (c), the two positioning holes 16 are through holes, which are connected to the sliders on the lathe guide rails through bolts and nuts to fix the main base 1.
[0026] In this embodiment, the main base 1 is integrally formed by machining, and has high precision and stability.
[0027] Figure 4 、 Figure 5 、 Figure 6 The following are the structures of the V-shaped component 3, the side support 4 (i.e. the left support and the right support) and the upper support 5, wherein Figure 4 (a) is a front view of the V-shaped component 3, Figure 4 (b) is a top view, Figure 4 (c) is its left side view; Figure 5 (a) is a front view of the side support member 4 (i.e., the left support member and the right support member), Figure 5 (b) is a top view, Figure 5(c) is its left side view; Figure 6 (a) is a front view of the upper support member 5, Figure 6 (b) is a top view, Figure 6 (c) is its left view.
[0028] The upper support member 5, the side support member 4 (i.e., the left support member and the right support member) and the V-shaped assembly 3 all have bosses 9, which are slidably connected to the upper slide rail 12, the left slide rail 14, the right slide rail 15 and the lower slide rail 13 respectively through the bosses 9. Figure 1 and Figure 2 As shown, the front ends of the upper support member 5, the left support member, and the right support member facing the center hole 11 are all provided with rollers 10 and their assembly structures. The rollers 10 are made of wear-resistant material and are used to directly contact the workpiece. In this embodiment, the boss 9 is a T-shaped boss adapted to the T-slot of the slide rail.
[0029] The two positioning members are installed on the main base 1 and are symmetrical to both sides of the upper support member 5. In this embodiment, the positioning members are adapted positioning nuts 7 and positioning bolts 8, and M10 nuts and M10 hexagon socket bolts can be selected. The end faces of the two positioning nuts 7 are parallel to the left and right sides of the upper support member 5 and have a spacing. The positioning bolts 8 are connected through the threaded holes of the positioning nuts 7. The spiral rotation of the positioning bolts 8 can realize its left and right movement. By moving left and right to contact the upper support member 5, the upper support member 5 can be locked and loosened; the upper bolt 6 is installed through the threaded hole of the block of the upper slide rail 12 The upper bolt 6 can be spirally rotated to achieve its up and down movement; the upper support member 5 is limited by the cooperation of the upper bolt 6 and the two positioning members. Specifically, when in the non-working state, the rotating positioning bolt 8 contacts and locks the upper support member 5; when in the working state, the positioning bolt 8 is loosened, and the upper support member 5 falls freely to contact the workpiece and is in place, and the upper bolt 6 is rotated downward to contact the upper support member 5 to achieve the limitation of the upper support member 5; when the working state is ended, the upper bolt 6 is rotated to withdraw upward, and after pushing the upper support member 5 upward into place, the rotating positioning bolt 8 contacts and locks the upper support member 5.
[0030] The locking nut 132 is located below the lower stopper 131 of the lower slide rail 13, and the lower bolt 2 passes through the locking nut 132 and the threaded hole of the lower stopper 131 of the lower rail in sequence; the lower bolt 2 is assembled through the threaded hole of the stopper of the lower rail 13, and the lower bolt 2 can be spirally rotated to realize its up and down movement. When the lower bolt 2 moves up and down, it contacts the V-shaped component 3, driving the V-shaped component 3 to move up and down in the lower slide rail 13. After moving into place, it is locked and limited by the locking nut 132; the left support and the right support are both provided with through grooves 41, and the V-shaped angle of the V-shaped component 3 is assembled through the through grooves 41 on the left support and the right support, so that when the V-shaped component 3 moves up and down in the lower rail 13, it drives the left support and the right support to move synchronously in the left slide rail 14 and the right slide rail 15 respectively. The left support and the right support are completely symmetrically distributed on both sides of the V-shaped component 3 to ensure accurate positioning; the length of the lower bolt 2 is greater than the length of the upper bolt 6. According to the structural design and the position layout of the upper bolt 2 and the lower bolt 6, the length of the upper bolt 2 and the lower bolt 6 needs to ensure that the moving distances of the three supports are equal. Therefore, the length of the upper bolt 6 is slightly equal to the moving distances of the three supports, and the length of the lower bolt is greater than the moving distances of the three supports (approximately the hypotenuse of a triangle).
[0031] When using:
[0032] All components are assembled as described above. When the upper support 5 is not in working state, any one of the positioning bolts 8 is rotated toward the upper support 5 to lock it. The V-shaped component 3 is located at the lower end of the lower rail 13. The spacing between the three rollers 10 of the upper support 5 and the two side supports 4 needs to meet the requirements for the workpiece to pass through. After the workpiece is loaded, the workpiece passes through the center hole 11 of the main base, and the main base 1 is adjusted to the appropriate position (usually in the middle of the workpiece), and the main base 1 is fixed to the lathe guide rail through the positioning hole 16 and the V-shaped groove 17. The outer circle of the workpiece is aligned by dialing, and the height of the spirally rotating lower bolt 2 is adjusted to drive the V-shaped component 3, the left support and the right support to move at the same time. The dialing is performed while adjusting, and the workpiece is finally brought to the center position of the machine tool. After it is in place, the lower bolt 2 is locked by the locking nut 132. Loosen the positioning bolt 8, and the upper support 5 slides freely to contact the workpiece. The spirally rotating upper bolt 6 locks the upper support 5, thereby achieving the centering support function of the workpiece. Among them, Figure 1 The state shown is suitable for centering workpieces with a maximum diameter of d1. Figure 2 The state shown is suitable for centering workpieces with a minimum diameter of d2. When centering workpieces with other diameters within the range of d1-d2, the height of the lower bolt 2 can be adjusted to adapt to centering workpieces with a diameter within the range of d1-d2.
[0033] After the centering is completed, the upper bolt 6 is withdrawn by spiral rotation, and the upper support 5 is manually moved upward away from the workpiece. After moving up into position, the upper support 5 is locked by the positioning bolt 8 to prevent it from sliding automatically, and the nut 132 is loosened, and the lower bolt 2 is loosened to move downward, driving the V-shaped assembly 3 and the two side supports 4 to move downward away from the workpiece, and the workpiece is lifted away. If a second workpiece needs to be processed, the above operation needs to be repeated. If not, loosen the connection between the bolts and nuts and the slider on the lathe guide rail according to the actual situation, and lift it off the main base.
[0034] The self-centering device for a lathe center frame provided in this embodiment changes the centering concept of the original device. By introducing a V-shaped component, precise centering of two points can be achieved simultaneously by adjusting only one position. While maintaining the accuracy of the three-point centering method, the number of points that need to be adjusted is reduced. The adjustment action is changed to a bolt height adjustment action, which significantly simplifies the adjustment process, reduces operation time and labor intensity, and significantly improves adjustment efficiency. At the same time, the bolt height adjustment action method also provides the possibility of an automated operation mode. The lower bolt is connected by a hydraulic cylinder, and the height adjustment is achieved by automatically pushing the lower bolt through the hydraulic cylinder, which is more effective, more labor-saving, and more convenient. The design of the V-shaped component and the left and right supports allows the workpiece to be quickly aligned with the center position of the machine tool in a single adjustment, greatly improving the speed and accuracy of centering.
[0035] All components of this device are self-made and standard parts. This design not only makes the manufacture and procurement of components more convenient, but also greatly simplifies the maintenance and replacement process. When a component is damaged, a replacement can be quickly found and replaced without complicated maintenance operations, thus ensuring the reliability and durability of the device.
[0036] The above description is merely an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. A person of ordinary skill in the art is aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, is able to obtain all existing technologies in the field, and has the ability to apply conventional experimental means before that date. A person of ordinary skill in the art can, under the guidance of this application, improve and implement the present scheme in combination with his or her own abilities. Some typical known structures or methods should not become an obstacle for a person of ordinary skill in the art to implement the present application. It should be pointed out that a person of ordinary skill in the art can make several variations and improvements without departing from the structure of the present invention. These should also be considered as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.
Claims
1. A lathe center frame self-centering device, characterized in that: It includes a main base, an auxiliary support assembly and an auxiliary limit assembly; the auxiliary support assembly includes an upper support member, a left support member and a right support member with the same main structure; the auxiliary limit assembly includes an upper bolt, a lower bolt, a locking nut, a V-shaped assembly and two positioning members; The main base is provided with a central hole, and four slide rails are provided along the circumference and coplanarity of the central hole, namely an upper slide rail and a lower slide rail located on the center line of the main base, and a left slide rail and a right slide rail symmetrically arranged on both sides of the lower rail; a stopper is fixedly installed at the upper end of the upper slide rail and the lower end of the lower slide rail, and a threaded hole is provided in the center of the stopper; The upper support member, the left support member, the right support member and the V-shaped assembly all have bosses, which are slidably connected to the upper slide rail, the left slide rail, the right slide rail and the lower slide rail respectively through the bosses; The two positioning members are installed on the main base and are symmetrical on both sides of the upper support member. The upper bolt passes through the threaded hole of the stopper of the upper slide rail. The upper support member is limited by the cooperation of the upper bolt and the two positioning members. The locking nut is located below the stopper of the lower rail, and the lower bolt passes through the locking nut and the threaded hole of the stopper of the lower rail in sequence, so that the lower bolt spirally contacts the V-shaped assembly when it moves up and down, driving the V-shaped assembly to move up and down, and is locked and limited by the locking nut after moving into place; the left support and the right support are both provided with through grooves, and the V-shaped angle of the V-shaped assembly is assembled through the through grooves on the left support and the right support, so that when the V-shaped assembly moves up and down, it drives the left support and the right support to move synchronously, and the V-shaped angle of the V-shaped assembly is always in the through groove during movement.
2. A lathe center frame self-centering device according to claim 1, characterized in that: The left slide rail and the right slide rail are located in the lower semicircle of the central hole.
3. The lathe center frame self-centering device according to claim 1, characterized in that: The front ends of the upper support member, the left support member and the right support member facing the center hole are all provided with rollers for contacting the workpiece.
4. The lathe center frame self-centering device according to claim 1, characterized in that: The bottom of the main base is provided with a positioning hole and a V-shaped groove for positioning the main base on a lathe.
5. The lathe center frame self-centering device according to claim 1, characterized in that: The positioning parts are matching positioning nuts and positioning bolts; the two positioning nuts are fixedly installed on the main base, the end faces of the two positioning nuts are parallel to the left and right sides of the upper support and have a distance between them, and the positioning bolts pass through the positioning nuts to contact the upper support to achieve the limitation of the upper support.
6. The lathe center frame self-centering device according to claim 1, characterized in that: The slide rail is a T-shaped slot; the boss is a T-shaped boss adapted to the T-shaped slot.
7. The lathe center frame self-centering device according to claim 1, characterized in that: The length of the lower bolt is greater than that of the upper bolt.
8. The lathe center frame self-centering device according to claim 1, characterized in that: When the V-shaped corners of the V-shaped assembly are assembled through the through slots on the left support member and the right support member, the left support member and the right support member are symmetrically distributed in the V-shaped assembly.
9. The lathe center frame self-centering device according to claim 1, characterized in that: The top end of the lower slide rail is located below the top ends of the left slide rail and the right slide rail.