Extrusion die

Abstract

The application relates to the technical field of machining, in particular to an outer circle precision grinding machine, which comprises a hollow bed body, a workpiece clamping mechanism and an outer circle grinding mechanism, wherein the workpiece clamping mechanism and the outer circle grinding mechanism are both installed on the hollow bed body; the hollow bed body provides stable support for the workpiece clamping mechanism and the outer circle grinding mechanism; the workpiece clamping mechanism clamps and drives the rotation of a workpiece; and the outer circle grinding mechanism performs grinding processing on the outer circle of the workpiece; the workpiece is clamped by the workpiece clamping mechanism, then the workpiece is driven to rotate by the workpiece clamping mechanism, and at the same time, the outer circle grinding mechanism operates and approaches the workpiece to perform grinding processing on the outer circle of the workpiece.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a precision external cylindrical grinding machine. Background Technology

[0002] External cylindrical grinding machines are machine tools that use grinding wheels to grind the outer cylindrical surface, conical surface, and other shaped surfaces of workpieces. They are widely used in the machining of precision parts in the machinery manufacturing industry. Current external cylindrical grinding machines, such as the one disclosed in invention patent CN114434226B and the one disclosed in invention patent CN102267071B, can all perform grinding on the outer cylindrical surface, conical surface, and other shaped surfaces of workpieces.

[0003] However, during use, it was found that existing cylindrical grinding machines, in order to meet the processing requirements of workpieces of different lengths, must have a bed length that is more than twice the workpiece length. This results in a large footprint, high manufacturing costs, and inconvenience in transportation and installation. Secondly, the manufacturing and installation of long bed guideways are difficult, and straightness errors are easily generated. At the same time, the motion stability of long-stroke worktables is poor, and vibrations are easily generated during high-speed movement, affecting machining accuracy and surface quality. Furthermore, the sliding or rolling guideways of existing cylindrical grinding machines wear out severely under long-term heavy-load operation, resulting in poor accuracy retention, short service life, and the need for frequent accuracy adjustments and maintenance. Moreover, the heat generated during processing can cause thermal deformation of the bed and worktable, further reducing machining accuracy, especially for high-precision parts. Therefore, there is an urgent need for a precision cylindrical grinding machine to improve the above problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an external cylindrical precision grinding machine that clamps the workpiece through a workpiece clamping mechanism, drives the workpiece to rotate through the workpiece clamping mechanism, and simultaneously runs and approaches the workpiece through an external cylindrical grinding mechanism to perform grinding on the outer diameter of the workpiece.

[0005] The present invention provides a precision external cylindrical grinding machine, comprising a hollowed-out bed; and further comprising a workpiece clamping mechanism and an external cylindrical grinding mechanism, both of which are mounted on the hollowed-out bed; The hollow bed provides stable support for the workpiece clamping mechanism and the external cylindrical grinding mechanism. The workpiece clamping mechanism clamps the workpiece and drives it to rotate, while the external cylindrical grinding mechanism grinds the outer diameter of the workpiece. The workpiece is clamped by the workpiece clamping mechanism, and then the workpiece is driven to rotate by the workpiece clamping mechanism. At the same time, the outer diameter grinding mechanism runs and approaches the workpiece to grind the outer diameter of the workpiece.

[0006] Preferably, the external cylindrical grinding mechanism includes a guide rail 1, a slide 1, a lead screw 1, a drive motor 1, a guide rail 2, a slide 2, a lead screw 2, a drive motor, a grinding head 1, and a grinding wheel. Guide rail 1 and drive motor 1 are both mounted on the die-cutting machine body. Slide 1 is slidably mounted on guide rail 1. Lead screw 1 is rotatably mounted on the die-cutting machine body, and one end of lead screw 1 is connected to the output shaft of drive motor 1. Lead screw 1 and slide 1 are threadedly connected. Guide rail 2 is mounted on slide 1 and slidably mounted on guide rail 2. Lead screw 2 is rotatably mounted on slide 1. The drive motor is fixedly mounted on... Mounted on slide one, with one end of lead screw two connected to the output shaft of drive motor, lead screw two and slide two are threaded together, machine head one is fixedly mounted on slide two, and grinding wheel is mounted on the spindle of machine head one; turn on drive motor one, and through lead screw one, slide one slides on guide rail one to adjust the position of grinding wheel laterally; turn on drive motor one, and through lead screw two, slide two slides on guide rail two to adjust the position of grinding wheel forward and backward; turn on machine head one to drive grinding wheel to rotate, facilitating grinding of the outer diameter of workpiece.

[0007] Preferably, the workpiece clamping mechanism includes a guide rail three, a front clamping end, a rear clamping end, a machine head two, a clamping head one, and a clamping head two. The guide rail three is mounted on the hollowing bed. The front clamping end and the rear clamping end are both slidably mounted on the guide rail three. The machine head two is mounted on the front clamping end. The clamping head one is mounted on the spindle of the machine head two. The clamping head two is rotatably mounted on the rear clamping end. The workpiece is placed between the clamping head one and the clamping head two, and the workpiece is clamped by the clamping head one and the clamping head two. Then, the machine head two drives the workpiece to rotate.

[0008] Preferably, the bottom of the first clamping head and the front clamping end are provided with a rotating structure; this facilitates the adjustment of the angle of the first clamping head, clamping irregularly shaped workpieces, and facilitating the adjustment of the grinding angle of the grinding wheel.

[0009] Preferably, guide rail 1, guide rail 2 and guide rail 3 are all hydrostatic guide rails; this reduces friction and improves the smoothness of equipment operation and machining accuracy.

[0010] Preferably, both the spindles of the first and second machine heads are hydrostatic spindles; this reduces friction and improves the smoothness of equipment operation and machining accuracy.

[0011] Preferably, the top of the hollowed-out bed is a marble platform; this provides a stable worktable for the workpiece clamping mechanism and the external cylindrical grinding mechanism.

[0012] Preferably, the interior of the openwork bed frame is equipped with a cooling system to keep the marble platform at a constant temperature.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The machining method adopts workpiece rotation and grinding head movement. The workpiece only rotates and does not move in a straight line. The grinding head moves back and forth along the transverse hydrostatic guide to complete the grinding of the entire workpiece length. Therefore, the length of the machine bed only needs to be slightly larger than the length of the workpiece. Compared with the traditional cylindrical grinding machine, it significantly reduces the equipment footprint, manufacturing costs and transportation and installation difficulties. 2. The guide rail adopts a hydrostatic guide rail, and a pressure oil film is formed between the guide rail surfaces, which realizes frictionless sliding, good motion stability and high positioning accuracy; 3. A marble workbench is used. Marble has the advantages of low thermal expansion coefficient, good rigidity and strong vibration resistance, which can effectively absorb vibration during the processing. 4. The worktable is equipped with a cooling circulation system, which can maintain a constant temperature and effectively suppress the impact of thermal deformation on machining accuracy. 5. The hydrostatic guide rail has no metal-to-metal contact wear, and the guide rail has good accuracy retention, which greatly reduces the maintenance cost and downtime of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first isometric structure of the present invention; Figure 2 This is a schematic diagram of the second isometric structure of the present invention; Figure 3 This is a schematic diagram of the first isometric structure of the external cylindrical grinding mechanism of the present invention; Figure 4 This is a schematic diagram of the second isometric structure of the external cylindrical grinding mechanism of the present invention; Figure 5 This is a front view schematic diagram of the external cylindrical grinding mechanism of the present invention; Figure 6 This is a first isometric structural schematic diagram of the workpiece clamping mechanism of the present invention; Figure 7 This is a schematic diagram of the second isometric structure of the workpiece clamping mechanism of the present invention; Figure 8 This is a front view schematic diagram of the workpiece clamping mechanism of the present invention.

[0015] The following are labels in the attached diagram: 1. Hollowed-out bed; 2. Guide rail one; 3. Slide one; 4. Lead screw one; 5. Drive motor one; 6. Guide rail two; 7. Slide two; 8. Lead screw two; 9. Drive motor; 10. Machine head one; 11. Grinding wheel; 12. Guide rail three; 13. Front clamping end; 14. Rear clamping end; 15. Machine head two; 16. Clamping head one; 17. Clamping head two. Detailed Implementation

[0016] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0017] Example 1: As Figures 1 to 8 As shown, an external cylindrical precision grinding machine includes a hollowed-out bed 1; it also includes a workpiece clamping mechanism and an external cylindrical grinding mechanism, both of which are mounted on the hollowed-out bed 1. The hollow bed 1 provides stable support for the workpiece clamping mechanism and the external cylindrical grinding mechanism. The workpiece clamping mechanism clamps the workpiece and drives the workpiece to rotate, while the external cylindrical grinding mechanism performs grinding on the outer diameter of the workpiece. The external cylindrical grinding mechanism includes a guide rail 12, a slide 13, a lead screw 14, a drive motor 15, a guide rail 26, a slide 27, a lead screw 28, a drive motor 9, a grinding head 10, and a grinding wheel 11. The guide rail 12 and the drive motor 15 are both mounted on the hollow bed 1. The slide 13 is slidably mounted on the guide rail 12. The lead screw 14 is rotatably mounted on the hollow bed 1, and one end of the lead screw 14 is connected to the output shaft of the drive motor 15. The lead screw 14 and the slide 13 are threadedly connected. The guide rail 26 is mounted on the slide 13. The slide 27 is slidably mounted on the guide rail 26. The lead screw 28 is rotatably mounted on the slide 13. The drive motor 9 is fixedly mounted on the slide 13, and one end of the lead screw 28 is connected to the output shaft of the drive motor 9. The lead screw 28 and the slide 27 are threadedly connected. The grinding head 10 is fixedly mounted on the slide 27. The grinding wheel 11 is mounted on the spindle of the grinding head 10. The workpiece clamping mechanism includes a guide rail 3 12, a front clamping end 13, a rear clamping end 14, a machine head 2 15, a clamping head 1 16, and a clamping head 2 17. The guide rail 3 12 is mounted on the hollow bed 1. The front clamping end 13 and the rear clamping end 14 are both slidably mounted on the guide rail 3 12. The machine head 2 15 is mounted on the front clamping end 13. The clamping head 1 16 is mounted on the spindle of the machine head 2 15. The clamping head 2 17 is rotatably mounted on the rear clamping end 14. The bottom of the head 10 and the front clamping end 13 are provided with a rotating structure; Guide rail 1 (2), guide rail 2 (6), and guide rail 3 (12) are all hydrostatic guide rails; Both the main shafts of head 10 and head 215 are hydrostatic main shafts; The workpiece is placed between clamping head 16 and clamping head 17, and clamped by clamping head 16 and clamping head 17. Then, the workpiece is driven to rotate by the operation of machine head 15. Then, drive motor 15 is turned on, and through lead screw 14, slide block 3 slides on guide rail 2 to adjust the position of grinding wheel 11 laterally. Drive motor 9 is turned on, and through lead screw 28, slide block 7 slides on guide rail 26 to adjust the position of grinding wheel 11 back and forth. Machine head 10 is turned on to drive grinding wheel 11 to rotate, which facilitates grinding of the outer circle of the workpiece by grinding wheel 11, thereby improving the practicality of the equipment.

[0018] Example 2: An external cylindrical precision grinding machine, which, based on Example 1, further includes: The external cylindrical grinding mechanism includes a guide rail 12, a slide 13, a lead screw 14, a drive motor 15, a guide rail 26, a slide 27, a lead screw 28, a drive motor 9, a grinding head 10, and a grinding wheel 11. The guide rail 12 and the drive motor 15 are both mounted on the hollow bed 1. The slide 13 is slidably mounted on the guide rail 12. The lead screw 14 is rotatably mounted on the hollow bed 1, and one end of the lead screw 14 is connected to the output shaft of the drive motor 15. The lead screw 14 and the slide 13 are threadedly connected. The guide rail 26 is mounted on the slide 13. The slide 27 is slidably mounted on the guide rail 26. The lead screw 28 is rotatably mounted on the slide 13. The drive motor 9 is fixedly mounted on the slide 13, and one end of the lead screw 28 is connected to the output shaft of the drive motor 9. The lead screw 28 and the slide 27 are threadedly connected. The grinding head 10 is fixedly mounted on the slide 27. The grinding wheel 11 is mounted on the spindle of the grinding head 10. The workpiece clamping mechanism includes a guide rail 3 12, a front clamping end 13, a rear clamping end 14, a machine head 2 15, a clamping head 1 16, and a clamping head 2 17. The guide rail 3 12 is mounted on the hollow bed 1. The front clamping end 13 and the rear clamping end 14 are both slidably mounted on the guide rail 3 12. The machine head 2 15 is mounted on the front clamping end 13. The clamping head 1 16 is mounted on the spindle of the machine head 2 15. The clamping head 2 17 is rotatably mounted on the rear clamping end 14. The bottom of the head 10 and the front clamping end 13 are provided with a rotating structure; Guide rail 1 (2), guide rail 2 (6), and guide rail 3 (12) are all hydrostatic guide rails; Both the main shafts of head 10 and head 215 are hydrostatic main shafts; The top of the openwork bed frame 1 is a marble platform; The hollowed-out bed frame 1 is equipped with a cooling system; The marble platform on top of the hollowed-out bed 1 provides a stable worktable for the workpiece clamping mechanism and the external cylindrical grinding mechanism. The cooling system inside the hollowed-out bed 1 maintains a constant temperature on the marble platform. The workpiece is placed between clamping head 16 and clamping head 17, which clamp the workpiece. The machine head 15 drives the workpiece to rotate. Then, the drive motor 5 is turned on, which drives the slide 3 to slide on the guide rail 2 via the lead screw 4, allowing the position of the grinding wheel 11 to be adjusted laterally. The drive motor 9 is turned on, which drives the slide 7 to slide on the guide rail 6 via the lead screw 8, allowing the position of the grinding wheel 11 to be adjusted forward and backward. The machine head 10 is turned on, driving the grinding wheel 11 to rotate, facilitating the grinding wheel 11 to grind the outer diameter of the workpiece, thereby improving the practicality of the equipment.

[0019] The main functions achieved by this invention are: 1. The processing method of workpiece rotation and grinding head movement is adopted. The workpiece only rotates and does not move in a straight line. The grinding head moves back and forth along the transverse hydrostatic guide to complete the grinding of the entire workpiece length. Therefore, the length of the bed only needs to be slightly larger than the length of the workpiece. Compared with the traditional cylindrical grinding machine, it significantly reduces the equipment footprint, manufacturing cost and transportation and installation difficulty. 2. The guide rail adopts a hydrostatic guide rail, and a pressure oil film is formed between the guide rail surfaces, which realizes frictionless sliding, good motion stability and high positioning accuracy; 3. A marble workbench is used. Marble has the advantages of low thermal expansion coefficient, good rigidity and strong vibration resistance, which can effectively absorb vibration during the processing. 4. The worktable is equipped with a cooling circulation system, which can maintain a constant temperature and effectively suppress the impact of thermal deformation on machining accuracy. 5. The hydrostatic guide rail has no metal-to-metal contact wear, and the guide rail has good accuracy retention, which greatly reduces the maintenance cost and downtime of the equipment.

[0020] The external cylindrical precision grinding machine of the present invention uses common mechanical methods for installation, connection, or setting. Any method that can achieve its beneficial effects can be implemented. "Marble platform" is a common term in the industry, but the actual material is natural granite. The clamping head 16 and clamping head 17 of the external cylindrical precision grinding machine of the present invention are commercially available. Technicians in the industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0021] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A precision external cylindrical grinding machine, comprising a hollowed-out bed (1); characterized in that, It also includes a workpiece clamping mechanism and an external cylindrical grinding mechanism, both of which are mounted on the hollow bed (1); The hollow bed (1) provides stable support for the workpiece clamping mechanism and the outer cylindrical grinding mechanism. The workpiece clamping mechanism clamps the workpiece and drives the workpiece to rotate, while the outer cylindrical grinding mechanism grinds the outer cylindrical surface of the workpiece.

2. The external cylindrical precision grinding machine as described in claim 1, characterized in that, The external cylindrical grinding mechanism includes a guide rail (2), a slide (3), a lead screw (4), a drive motor (5), a guide rail (6), a slide (7), a lead screw (8), a drive motor (9), a head (10), and a grinding wheel (11). The guide rail (2) and the drive motor (5) are both mounted on the hollow bed (1). The slide (3) is slidably mounted on the guide rail (2). The lead screw (4) is rotatably mounted on the hollow bed (1), and one end of the lead screw (4) is connected to the output shaft of the drive motor (5). 1 (4) is threadedly connected to slide 1 (3), guide rail 2 (6) is installed on slide 1 (3), slide 2 (7) is slidably installed on guide rail 2 (6), lead screw 2 (8) is rotatably installed on slide 1 (3), drive motor (9) is fixedly installed on slide 1 (3), and one end of lead screw 2 (8) is connected to the output shaft of drive motor (9). Lead screw 2 (8) is threadedly connected to slide 2 (7), machine head 1 (10) is fixedly installed on slide 2 (7), and grinding wheel (11) is installed on the spindle of machine head 1 (10).

3. The external cylindrical precision grinding machine as described in claim 2, characterized in that, The workpiece clamping mechanism includes a guide rail three (12), a front clamping end (13), a rear clamping end (14), a machine head two (15), a clamping head one (16) and a clamping head two (17). The guide rail three (12) is mounted on the hollow bed (1). The front clamping end (13) and the rear clamping end (14) are both slidably mounted on the guide rail three (12). The machine head two (15) is mounted on the front clamping end (13). The clamping head one (16) is mounted on the spindle of the machine head two (15). The clamping head two (17) is rotatably mounted on the rear clamping end (14).

4. The external cylindrical precision grinding machine as described in claim 3, characterized in that, Rotary structures are provided at the bottom of the head (10) and the front clamping end (13).

5. A precision external cylindrical grinding machine as described in claim 3, characterized in that, Guide rail 1 (2), guide rail 2 (6) and guide rail 3 (12) are all hydrostatic guide rails.

6. The external cylindrical precision grinding machine as described in claim 3, characterized in that, Both the spindles of head 1 (10) and head 2 (15) are hydrostatic spindles.

7. The external cylindrical precision grinding machine as described in claim 1, characterized in that, The top of the openwork bed (1) is a marble platform.

8. The external cylindrical precision grinding machine as described in claim 1, characterized in that, The hollow bed frame (1) is equipped with a cooling system.

Images