Workpiece positioning mechanism of centerless grinding machine
By designing and installing a base, a U-shaped guide plate, and a locking mechanism on a centerless grinder, stable positioning of the workpiece is achieved, solving the problems of workpiece displacement and runout during high-speed grinding, and improving machining accuracy and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-03-13
AI Technical Summary
The existing workpiece positioning mechanism of centerless grinders has poor applicability under high-speed grinding conditions, and the workpiece is prone to displacement and runout, which affects the machining accuracy and quality.
It adopts a mounting base with mounting holes at four corners, combined with a U-shaped directional plate, a frame, a connecting seat and a directional limiting device. It uses a threaded rod to adjust the position and a locking mechanism to achieve stable positioning of the workpiece. Through the cooperation of steel ball lifting and arc-shaped pressure plate, it can adapt to the positioning requirements of workpieces with different outer diameters.
It effectively avoids workpiece displacement and runout during high-speed rotation, ensuring machining quality. It is suitable for high-speed centerless grinding machine operation and allows for easy replacement of orientation and limit devices to adapt to machining needs of different sizes.
Smart Images
Figure CN223989330U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of centerless grinding technology, and specifically relates to a workpiece positioning mechanism for a centerless grinding machine. Background Technology
[0002] In modern industrial production, centerless grinders are widely used in the machining of various precision parts. However, the workpiece positioning mechanism of existing centerless grinders has many shortcomings. During the machining process, the workpiece is easily affected by factors such as grinding force and uneven material properties, leading to positioning deviations.
[0003] Traditional positioning methods typically use V-shaped support plates for auxiliary positioning. This type of positioning mechanism has poor adaptability to high-speed grinding conditions; the workpiece is prone to displacement and runout during high-speed rotation, significantly affecting machining accuracy and surface quality. Some operators may use hand-feeding to ensure grinding stability during the initial workpiece feeding, but this method not only poses operational risks but also affects the workpiece rotation speed, thus impacting grinding quality. Therefore, a workpiece positioning mechanism for a centerless grinder is provided to solve the aforementioned technical problems. Utility Model Content
[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a workpiece positioning mechanism for a centerless grinder, which solves the problems of poor applicability to high-speed grinding conditions and easy displacement and runout of the workpiece when it rotates at high speed, thus affecting the processing quality.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A workpiece positioning mechanism for a centerless grinder includes a mounting base with mounting holes at its four corners. Two U-shaped guide plates are fixedly mounted on the upper surface of the mounting base. A frame is slidably mounted between the two U-shaped guide plates. A connecting seat is fixedly mounted on the upper surface of the frame. A directional limiting device is detachably mounted on the upper surface of the connecting seat. A mounting groove is formed through the front surface of the connecting seat. A locking mechanism for fixing the directional limiting device is installed in the mounting groove.
[0007] In the above technical solution, two limiting shells are symmetrically fixedly installed on the upper surface of the connecting seat, and an installation opening is reserved between the two limiting shells. The upper surface of the connecting seat is provided with a transition groove that communicates with the installation groove. The directional limiting device includes a fixing plate. A connecting column is fixedly installed on the lower surface of the fixing plate. The connecting column is rotatably installed in the transition groove, and two locking blocks are symmetrically fixedly installed on the outer surface of the connecting column. The locking blocks are locked between the corresponding limiting shell and the upper surface of the connecting seat. A U-shaped support is fixedly installed on the upper surface of the fixing plate. An arc-shaped pressure plate is fixedly installed on the upper surface of the U-shaped support. Multiple steel balls are rotatably embedded in the opposite surfaces of the arc-shaped pressure plate and the U-shaped support.
[0008] In the above technical solution, the lower surface of the connecting column is provided with a slot, the locking mechanism includes a ⊥ block and a spring, the upper section of the ⊥ block is inserted into the slot, the lower section of the ⊥ block is slidably installed in the mounting groove, and the spring is fixedly installed between the lower surface of the ⊥ block and the upper surface of the frame.
[0009] In the above technical solution, a threaded rod is threadedly installed through the frame, and the bottom end of the threaded rod is rotatably connected to the mounting base.
[0010] In the above technical solution, an inner rotor bearing is embedded and fixedly installed on the upper surface of the mounting base, and the outer surface of the bottom end of the threaded rod is interference-fitted with the inner surface of the inner rotor bearing.
[0011] The workpiece positioning mechanism for a centerless grinder of this utility model has the following advantages compared with the prior art:
[0012] I. This utility model can fix the mounting base near the machining area of the centerless grinder and adjust the position of the orientation limiting device by manually rotating the threaded rod, so that the steel ball in the U-shaped support is level with the workpiece support, and support and position the cylindrical workpiece that passes through. It can effectively prevent the workpiece from shifting or jumping when it first contacts the grinding workpiece and rotates at high speed, thus ensuring the machining quality. It is also suitable for the working environment of a high-speed rotating centerless grinder.
[0013] Second, this utility model can lock and fix the orientation limiting device by means of a locking mechanism. During the positioning operation of cylindrical workpieces with different outer diameters, the locking mechanism can be easily operated to release the locking constraint on the orientation limiting device, and then a suitable orientation limiting device can be quickly selected for replacement. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.
[0015] Figure 2 This is a schematic diagram of the main structure of this utility model.
[0016] Figure 3 This is a cross-sectional structural diagram of the present invention.
[0017] Figure 4 This is a schematic diagram of the exploded structure of this utility model.
[0018] Figures 1-4 The components include: 1. Mounting base; 11. U-shaped directional plate; 2. Carrier frame; 3. Connecting seat; 31. Limiting shell; 32. Mounting groove; 4. Orientation and limiting device; 41. Fixing plate; 42. Connecting column; 421. Locking block; 422. Slot; 43. U-shaped support; 44. Arc-shaped pressure plate; 45. Steel ball; 5. Locking mechanism; 51. ⊥-shaped block; 52. Spring; 6. Threaded rod. Detailed Implementation
[0019] 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.
[0020] In this embodiment, front, back, left, right, top, and bottom are... Figure 1 Describe the reference plane. See [link / reference] Figures 1-4 This utility model provides a technical solution:
[0021] A workpiece positioning mechanism for a centerless grinder includes a mounting base 1 with mounting holes at four corners. Two U-shaped guide plates 11 are fixedly mounted on the upper surface of the mounting base 1 by welding. A frame 2 is vertically slidably mounted between the two U-shaped guide plates 11. A connecting seat 3 is fixedly mounted on the upper surface of the frame 2 by multiple bolts. The connecting seat 3 is π-shaped, and a detachable and replaceable orientation limiting device 4 is mounted on the top of the connecting seat 3. A mounting groove 32 extends through the front surface of the connecting seat 3, and a locking mechanism 5 for locking and fixing the orientation limiting device 4 is installed in the mounting groove 32.
[0022] like Figure 3 As shown, the upper surface of the connector 3 has an adapter groove that communicates with the mounting groove 32. Two limiting shells 31 are symmetrically welded and fixedly installed on the upper surface of the connector 3. The shape of the limiting shells 31 is as follows: Figure 4 As shown, an installation port is reserved between the two limiting shells 31.
[0023] Combination Figure 1 and Figure 2As shown, the directional limiting device 4 includes a fixed plate 41. A connecting column 42 is welded and fixedly installed on the lower surface of the fixed plate 41. The connecting column 42 is rotatably installed in the connecting groove, and two locking blocks 421 are symmetrically welded and fixedly installed on the outer surface of the connecting column 42. When the connecting column 42 is inserted into the connecting groove, it can be rotated and locked into the limiting shell 31 from the installation port position between the two limiting shells 31, thus completing the connection between the connecting column 42 and the connecting seat 3. A U-shaped support 43 is welded and fixedly installed on the upper surface of the fixed plate 41. An arc-shaped pressure plate 44 is fixedly installed on the upper surface of the U-shaped support 43 by bolts. Multiple steel balls 45 are rotatably embedded in the opposite surfaces of the arc-shaped pressure plate 44 and the U-shaped support 43. The multiple steel balls 45 work together to position and guide the cylindrical workpiece. The size of the U-shaped support 43 and the arc-shaped pressure plate 44 and the relative arrangement of the steel balls 45 need to be customized according to the outer diameter of the workpiece so that the steel balls 45 at the corresponding positions on the upper and lower sides can work together to position the workpiece while ensuring that the workpiece can move smoothly to the left.
[0024] Combination Figure 4 As shown, the locking mechanism 5 includes a ⊥ block 51 and a spring 52. The top end of the ⊥ block 51 is inserted into the slot 422 of the connecting post 42 through the mounting groove 32. It is used to position the connecting post 42 in the rotational direction, prevent the locking block 421 from rotating easily, and ensure the stability of the connecting post 42 installation. The lower section of the ⊥ block 51 is slidably disposed in the mounting groove 32. The top end of the spring 52 is welded and fixed to the lower surface of the ⊥ block 51, and the bottom end of the spring 52 is welded and fixed to the upper surface of the frame 2. The ⊥ block 51 can be stably locked into the slot 422 of the connecting post 42 by the support of the spring 52.
[0025] When the directional limiting device 4 needs to be replaced, the lower section of the ⊥ block 51 can be manually pressed down to drive the upper section of the ⊥ block 51 out of the slot 422 of the connecting post 42. At this time, the connecting post 42 can be rotated to make the locking block 421 rotate to the mounting port position between the two limiting shells 31. Then, the connecting post 42 can be moved up to separate the directional limiting device 4 from the connecting seat 3 for replacement.
[0026] Finally, to facilitate the adjustment of the height of the directional limiting device 4, a threaded rod 6 is threaded through and installed inside the frame 2. The bottom end of the threaded rod 6 is embedded in the mounting base 1 through an inner rotor bearing. The threaded rod 6 is interference-fitted with the inner side wall of the inner rotor bearing, and the outer surface of the inner rotor bearing is interference-fitted with the mounting base 1. The threaded rod 6 can be manually rotated to adjust the height of the frame 2, thereby moving the connecting seat 3 and the directional limiting device 4 up and down to adjust the guide height to meet the guide requirements of different heights.
[0027] Working principle: During use, the mounting base 1 is fixed to the vicinity of the machining area of the centerless grinder through its own mounting holes and external bolts. After installation, the threaded rod 6 is manually rotated to move the orientation limiting device 4 up and down to adjust its position, so that the position of the steel ball 45 in the U-shaped support 43 is level with the position of the workpiece support in the machining area of the centerless grinder. Then, the cylindrical workpiece to be ground is passed between the U-shaped support 43 and the arc-shaped pressure plate 44. After passing through, the upper and lower steel balls 45 support and position the cylindrical workpiece. At this time, the cylindrical workpiece is pushed into the machining area of the centerless grinder using external roller tools. When the cylindrical workpiece initially contacts the grinding part of the high-speed rotating centerless grinder, the positioning of the orientation limiting device 4 can effectively prevent the cylindrical workpiece from shifting or jumping, thereby ensuring the machining quality. As the grinding process proceeds, the workpiece is gradually ground to near or reach the required size and shape. At this stage, the diameter of the workpiece has been reduced to near its final size, and the contact state between it and the grinding wheel and guide wheel is relatively stable. The end of the workpiece no longer needs to be precisely positioned and transported. Compared with existing technologies, the entire positioning process is applicable to the working environment of high-speed rotating centerless grinders, effectively avoiding the problems of displacement and jumping of the workpiece when it rotates at high speed, which affect the processing quality.
Claims
1. A workpiece positioning mechanism of a centerless grinding machine comprising a mounting base (1) having mounting holes at four corners, characterized in that, The upper surface of the mounting base (1) is fixedly installed with two U-shaped orientation plates (11), a carrier frame (2) is slidingly installed between the two U-shaped orientation plates (11), the upper surface of the carrier frame (2) is fixedly installed with a connecting seat (3), the upper surface of the connecting seat (3) is detachably installed with an orientation limiting device (4), the front surface of the connecting seat (3) is penetratingly provided with a mounting slot (32), and a locking mechanism (5) for fixing the orientation limiting device (4) is installed in the mounting slot (32).
2. A workpiece positioning mechanism for a centerless grinding machine as defined in claim 1, wherein The upper surface of the connecting seat (3) is fixedly installed with two limiting shells (31) in a symmetrical manner, and a mounting opening is reserved between the two limiting shells (31); and the upper surface of the connecting seat (3) is provided with a switching slot (32) in communication with the mounting slot (32); The orientation limiting device (4) comprises a fixed plate (41), the lower surface of the fixed plate (41) is fixedly installed with a connecting column (42), the connecting column (42) is rotatably installed in the switching slot, the outer surface of the connecting column (42) is fixedly installed with two clamping blocks (421) in a symmetrical manner, the clamping blocks (421) are clamped and installed between the upper surfaces of the corresponding limiting shells (31) and the connecting seat (3), the upper surface of the fixed plate (41) is fixedly installed with a U-shaped bracket (43), the upper surface of the U-shaped bracket (43) is fixedly installed with an arc-shaped pressing plate (44), and a plurality of steel balls (45) are rotatably installed in the opposite surfaces of the arc-shaped pressing plate (44) and the U-shaped bracket (43).
3. A workpiece positioning mechanism for a centerless grinding machine as defined in claim 2 wherein, The lower surface of the connecting column (42) is provided with a slot (422), the locking mechanism (5) comprises a ⊥-shaped block (51) and a spring (52), the upper section of the ⊥-shaped block (51) is insertedly installed in the slot (422), the lower section of the ⊥-shaped block (51) is slidingly installed in the mounting slot (32), and the spring (52) is fixedly installed between the lower surface of the ⊥-shaped block (51) and the upper surface of the carrier frame (2).
4. The workpiece positioning mechanism of a centerless grinding machine according to claim 1, wherein A threaded rod (6) is penetratingly and screwingly installed in the carrier frame (2), and the bottom end of the threaded rod (6) is rotatably connected with the mounting base (1).
5. A workpiece positioning mechanism for a centerless grinding machine as defined in claim 4 wherein, An inner rotor bearing is embeddedly and fixedly installed on the upper surface of the mounting base (1), and the bottom end outer surface of the threaded rod (6) is in interference fit with the inner surface of the inner rotor bearing.