Small special numerical control thread grinder

Abstract

The utility model discloses a small-sized special numerical control thread grinding machine, belongs to the grinding machine technology, and solves the problems that the conventional thread grinding machine grinds a single grinding wheel every time, is low in efficiency and is not suitable for large-batch small-sized screw machining. The first grinding wheel and the second grinding wheel are arranged on the two radial sides of the part, and the first grinding wheel and the second grinding wheel can conduct rough grinding and fine grinding at the same time; the axial leads of the grinding dressing wheel, the part and the power head for driving the part to rotate are parallel and are arranged on a longitudinal carriage between the first grinding wheel and the second grinding wheel, and the longitudinal carriage can drive the part, the dressing wheel and the like to axially move back and forth; the first grinding wheel and the second grinding wheel are arranged on the first transverse carriage and the second transverse carriage respectively and can transversely move left and right on the two radial sides of the part. Through numerical control grinding linkage and finishing linkage of the machine tool, precise grinding and efficient grinding of the small screw are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of grinding machine technology, specifically relating to a multi-axis linkage small special CNC thread grinding machine for grinding micro-sized shaft-type external thread parts. Background Technology

[0002] Existing external thread grinding machines use the same grinding wheel for both rough and finish grinding of parts. Prioritizing rough grinding efficiency results in a loss of final part accuracy and surface quality; conversely, prioritizing both results in a loss of overall machining efficiency. While separating rough and finish grinding for a more balanced approach is feasible, in practice, tool setting for different thread profiles at different stages becomes difficult, sometimes even leading to scrapping. Therefore, current grinding methods for micro-sized shaft-type external thread parts are inefficient and unsuitable for large-scale industrial production. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by this utility model is to overcome the dilemma that the existing external thread grinding machines have low grinding efficiency and are not suitable for industrial mass production, and to provide a small special CNC thread grinding machine that is suitable for grinding small parts, so that the parts have higher processing accuracy, better surface morphology, and improved production efficiency and reduced manufacturing costs.

[0004] To achieve the above objectives, the small-scale special CNC thread grinding machine of this utility model includes:

[0005] A longitudinal slide that can be driven to move back and forth longitudinally by a third drive is provided on the longitudinal slide. A power head system for clamping one end of a part and driving the part to rotate, a support system for clamping the other end of the part, and a dressing wheel system for dressing the grinding wheel are provided on the longitudinal slide. The rotation axis of the power head system is coaxial with the axis of the part and parallel to the rotation axis of the dressing wheel system and the direction of movement of the longitudinal slide.

[0006] The first grinding wheel and the second grinding wheel are arranged on both radial sides of the part. The first grinding wheel is coaxially mounted on the first spindle and can be moved laterally left and right by the first transverse slide under the drive of the first driver. The second grinding wheel is coaxially mounted on the second spindle and can be moved laterally left and right by the second transverse slide under the drive of the second driver.

[0007] The electrical program control system controls the rotation of the first spindle, the second spindle, the power head system, and the dressing wheel system, as well as the movement of the first transverse slide, the second transverse slide, and the longitudinal slide to dress the grinding wheel and process parts.

[0008] The rotation of the part driven by the power head system and the longitudinal forward and backward movement driven by the third drive are CNC linked and can be processed by the first grinding wheel and the second grinding wheel at the same time.

[0009] Therefore, the first and second grinding wheels can simultaneously perform rough and fine grinding on the parts, taking into account the parts' accuracy, surface quality, and efficiency. This overcomes the difficulties in tool setting and even the possibility of scrapping due to different thread profiles in different machining steps, resulting in parts with higher machining accuracy, better surface morphology, improved production efficiency, and reduced manufacturing costs.

[0010] Preferably, the first spindle is mounted on a first spindle seat, which is directly or indirectly mounted on a first transverse slide, which is located on one side of the machine bed; the second spindle is mounted on a second spindle seat, which is directly or indirectly mounted on a second transverse slide, which is located on the other side of the machine bed; and the longitudinal slide is located in the middle of the machine bed in the left-right direction, between the first and second transverse slides. This structure makes the entire thread grinding machine approximately symmetrical, with a reasonable layout, suitable for precision and efficient machining of micro-sized shaft-type external threaded parts.

[0011] Preferably, the first spindle seat is directly or indirectly mounted on a first composite component having a rotatable first support shaft. The axis of the first support shaft is perpendicular to the centerline of the part. The first support shaft is directly or indirectly mounted on a first bracket, and the first bracket is directly or indirectly mounted on a first transverse slide. The first support shaft can rotate around the axis of the first support shaft to adjust the posture of the first grinding wheel. Accordingly, the posture of the first grinding wheel can be adjusted as needed to achieve precision machining of micro-sized shaft-type external threaded parts with different leads and guide angles.

[0012] Preferably, the axis of the first support shaft intersects the first grinding wheel at the center of the geometric profile of the outer circle of the first grinding wheel. This ensures that the posture of the first grinding wheel can be precisely adjusted by rotating the first support shaft, thus guaranteeing the quality of the machining.

[0013] Preferably, the second spindle seat is directly or indirectly mounted on a second composite component having a rotatable second support shaft. The axis of the second support shaft is perpendicular to the centerline of the part. The second support shaft is directly or indirectly mounted on a second bracket, and the second bracket is directly or indirectly mounted on a second transverse slide. The second support shaft can rotate around the axis of the second support shaft to adjust the posture of the second grinding wheel. Accordingly, the posture of the second grinding wheel can be adjusted as needed to achieve precision machining of micro-sized shaft-type external threaded parts with different leads and guide angles.

[0014] Preferably, the axis of the second support shaft intersects the second grinding wheel at the center of the geometric profile of the outer circle of the second grinding wheel. This ensures that the posture of the first grinding wheel is precisely adjusted by rotating the first support shaft, thus guaranteeing the quality of the machining process.

[0015] Preferably, the first support and / or the second support are frame members or box members. This provides the first support and / or the second support with sufficient structural performance to function as a positioning and support shaft for the first support shaft and / or the second support shaft.

[0016] Preferably, the longitudinal slide is composed of an upper slide and a lower slide stacked together. The upper slide can rotate slightly relative to the lower slide around a pivot and is locked. The power head system, support system, and dressing wheel system are mounted on the upper slide and arranged longitudinally in a front-to-back configuration. Accordingly, the dimensional differences (similar to taper) of the parts along the entire axial length can be finely adjusted as needed to ensure machining accuracy.

[0017] Preferably, the power head system includes a drive actuator with a central through hole capable of rotating the part, a front center system passing through the central through hole of the drive actuator and directly or indirectly fixed to the longitudinal slide, and a clamp mounted at the front end of the drive actuator for holding the part. This structure separates the part positioning error minimization function and the rotational accuracy refinement function in the power head system, maximizing machining accuracy.

[0018] Preferably, the dressing wheel system includes at least one set of dressing wheels and a dressing electric spindle. The dressing wheels are coaxially mounted on the dressing electric spindle, and the dressing electric spindle is directly or indirectly mounted on the longitudinal slide via a dressing wheel seat. Accordingly, the dressing electric spindle, carrying the dressing wheels, performs precise dressing on the first grinding wheel and / or the second grinding wheel.

[0019] Preferably, the dressing wheel system includes two sets of symmetrical dressing wheels and a dressing electric spindle, with each of the first and second grinding wheels being dressed by one dressing wheel. Accordingly, different dressing wheels can be configured according to the different functions of the first and second grinding wheels, improving dressing efficiency and accuracy.

[0020] This invention, by arranging a first grinding wheel and a second grinding wheel on both radial sides of a part, allows for simultaneous rough and fine grinding of the part by the first and second grinding wheels, balancing part precision, surface quality, and efficiency. It overcomes the difficulties in tool setting for different thread profiles at different machining steps, which could even lead to scrapping, resulting in parts with higher machining accuracy, better surface morphology, improved production efficiency, and reduced manufacturing costs.

[0021] This utility model integrates the power head system, support system, and dressing wheel system on a longitudinal slide to achieve clamping of the part, axial feeding, and dressing of the first and second grinding wheels. During grinding, the first and second grinding wheels can process the part simultaneously. This design is compact, efficient, and precise. Attached Figure Description

[0022] Figure 1This is an isometric view of the small special CNC thread grinding machine of this utility model;

[0023] Figure 2 The power head system, support system, and dressing wheel system of this utility model are all arranged on an axonometric view of a longitudinal slide.

[0024] Figure 3 for Figure 2 Another axonometric view of the structure shown;

[0025] Figure 4 for Figure 2-3 A schematic diagram of the structure shown from left to right;

[0026] Figure 5 for Figure 4 Left view of;

[0027] Figure 6 This is an axonometric view of the first grinding wheel of this utility model configured in the first composite component;

[0028] Figure 7 This is an axonometric view of the second grinding wheel of this utility model configured in the second composite component;

[0029] Figure 8 This is a schematic diagram showing the positional relationship between the first grinding wheel, the second grinding wheel, and the part from a top view.

[0030] Explanation of the numbering in the diagram: 1. Part; 101. Centerline of part; 2. First grinding wheel; 3. First spindle; 4. First spindle seat; 5. First transverse slide; 6. Bed; 7. First driver; 8. Second grinding wheel; 9. Second spindle; 10. Second spindle seat; 11. Second transverse slide; 12. Second driver; 13. Longitudinal slide; 131. Upper slide; 132. Lower slide; 14. Third driver; 15. Power head system; 151. Rotation centerline of the power head system; 1 52 Drive actuator, 153 clamp, 154 front center system, 16 support system, 17 dressing wheel system, 171 rotation axis of dressing wheel system, 172 dressing electric spindle, 173 dressing wheel, 174 dressing wheel seat, 18 first support shaft, 181 axis of first support shaft, 19 first bracket, 20 second support shaft, 201 axis of second support shaft, 21 second bracket, 22 rotating shaft, 23 first composite component, 24 second composite component. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0033] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "radial," and "axial," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Among them, "upper" and "lower," "left" and "right," and "front" and "rear" are opposite in direction; "lateral" and "longitudinal," and "radial" and "axial" are perpendicular in direction. The axial direction is the front-back direction in the drawings, and the lateral direction is the left-right direction in the drawings.

[0034] In the description of this utility model, it should be understood that the technical features defined by terms such as "first," "second," and "third," which have a sequential concept, are only used to clearly describe the defined technical features and to clearly distinguish the defined technical features from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, the part refers to a shaft-type external threaded part.

[0036] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0037] like Figure 1 The small special CNC thread grinding machine shown includes:

[0038] like Figure 2-5The longitudinal slide 13 shown can be driven to move longitudinally back and forth by the third driver 14. The longitudinal slide 13 is equipped with a power head system 15 for clamping one end of the part 1 and driving the part to rotate, a support system 16 for clamping the other end of the part 1, and a dressing wheel system 17 for dressing the grinding wheel. The rotation axis 151 of the power head system is coaxial with the axis 101 of the part and parallel to the rotation axis 171 of the dressing wheel system and the direction of movement of the longitudinal slide.

[0039] like Figure 1 , Figure 8 The first grinding wheel 2 and the second grinding wheel 8 are arranged on both radial sides of part 1. The first grinding wheel 2 is coaxially mounted on the first spindle 3 and can be moved laterally left and right by the first transverse slide 5 under the drive of the first driver 7. The second grinding wheel 8 is coaxially mounted on the second spindle 9 and can be moved laterally left and right by the second transverse slide 11 under the drive of the second driver 12.

[0040] The electrical program control system controls the rotation of the first spindle 3, the second spindle 9, the power head system 15, and the dressing wheel system 17, as well as the movement of the first transverse slide, the second transverse slide, and the longitudinal slide to dress the grinding wheel and process parts.

[0041] The rotation of the part driven by the power head system 15 and the longitudinal forward and backward movement driven by the third driver 14 are CNC linked and can be processed by the first grinding wheel 2 and the second grinding wheel 8 simultaneously.

[0042] Therefore, the first and second grinding wheels can simultaneously perform rough and fine grinding on the parts, taking into account the parts' accuracy, surface quality, and efficiency. This overcomes the difficulties in tool setting and even the possibility of scrapping due to different thread profiles in different machining steps, resulting in parts with higher machining accuracy, better surface morphology, improved production efficiency, and reduced manufacturing costs.

[0043] Figure 1 In the structure shown, the first spindle 3 is mounted on the first spindle seat 4, which is directly or indirectly mounted on the first transverse slide 5, which is located on one side of the bed 6. The second spindle 9 is mounted on the second spindle seat 10, which is directly or indirectly mounted on the second transverse slide 11, which is located on the other side of the bed 6. The longitudinal slide 13 is located in the middle of the bed 6 in the left-right direction and between the first transverse slide 5 and the second transverse slide 11. This structure makes the entire thread grinding machine roughly symmetrical from left to right, with a reasonable layout, suitable for precision and efficient machining of micro-sized shaft-type external threaded parts.

[0044] Figure 6In the structure shown, the first spindle seat 4 is directly or indirectly mounted on the end face of the first composite component 23, which has a rotatable first support shaft 18. The first support shaft 18 is fixed together with the first composite component 23 so that the first composite component 23 can rotate with the first support shaft 18. The axis 181 of the first support shaft is perpendicular to the axis 101 of the part. The first support shaft 18 is directly or indirectly mounted on the first bracket 19, and the first bracket 19 is directly or indirectly mounted on the first transverse slide 5. The first support shaft can rotate the first spindle seat 4, the first spindle 3, and the first grinding wheel 2 around the axis 181 of the first support shaft to adjust the posture of the first grinding wheel 2. The first grinding wheel 2 is positioned and held in the desired posture by locking the first support shaft. Accordingly, the posture of the first grinding wheel 2 can be adjusted as needed to achieve precision machining of micro-sized shaft-type external thread parts with different leads and guide angles.

[0045] Figure 8 In the structure shown, the axis 181 of the first support shaft intersects the first grinding wheel 2 at the center of the geometric contour of the outer circle of the first grinding wheel 2. This ensures that the posture of the first grinding wheel is precisely adjusted by rotating the first support shaft, thus guaranteeing the quality of the machining.

[0046] Figure 7 In the illustrated structure, the second spindle seat 10 is directly or indirectly mounted on the end face of the second composite component 24, which has a rotatable second support shaft 20. The second support shaft 20 is fixed together with the second composite component 24 so that the second composite component 24 can rotate with the second support shaft 20. The axis 201 of the second support shaft is perpendicular to the axis 101 of the part. The second support shaft 20 is directly or indirectly mounted on the second bracket 21, and the second bracket 21 is directly or indirectly mounted on the second transverse slide 11. The second support shaft can rotate the second spindle seat 10, the second spindle 9, and the second grinding wheel 8 around the axis 201 of the second support shaft to adjust the posture of the second grinding wheel 8. The second grinding wheel 8 is positioned and held in the desired posture by locking the second support shaft. Accordingly, the posture of the second grinding wheel 2 can be adjusted as needed to achieve precision machining of micro-sized shaft-type external thread parts with different leads and guide angles.

[0047] Figure 8 In the structure shown, the axis 201 of the second support shaft intersects the second grinding wheel 8 at the center of the geometric contour of the outer circle of the second grinding wheel 8. This ensures that the posture of the first grinding wheel is precisely adjusted by the rotation of the first support shaft, thus guaranteeing the quality of the machining.

[0048] Figure 6-7In the structure shown, the first support 19 and the second support 21 are box-shaped components. The first support 19 and the second support 21 are endowed with sufficient structural performance to function as positioning and supporting the first support shaft 18 and / or the second support shaft 20. In other embodiments, the first support 19 and the second support 21 can also be frame components.

[0049] Figure 2-5 In the structure shown, the longitudinal slide 13 is composed of an upper slide 131 and a lower slide 132 stacked together. The upper slide 131 can rotate slightly relative to the lower slide 132 around the pivot 22 connecting the two slides and is locked. The power head system 15, the support system 16, and the dressing wheel system 17 are mounted on the upper slide 131 and arranged in a front-rear longitudinal configuration. Accordingly, the dimensional differences (similar to taper) of the parts along the entire axial length can be finely adjusted as needed to ensure machining accuracy.

[0050] Figure 2-5 In the structure shown, the power head system 15 includes a drive actuator 152 with a central through hole capable of rotating part 1, a front center system 154 passing through the central through hole of the drive actuator 152 and directly or indirectly fixed to the longitudinal slide, and a clamp 153 mounted on the front end of the drive actuator 152 and extending towards part 1 for clamping part 1. The power head system 15 has the functions of positioning, clamping, and driving the rotation of shaft-like parts 1. This structure is compact, has a reasonable division of labor, and minimizes errors.

[0051] Figure 2-5 In the structure shown, the dressing wheel system 17 includes at least one set of dressing wheels 173 and a dressing electric spindle 172. The dressing wheels 173 are coaxially mounted on the dressing electric spindle 172, and the dressing electric spindle 172 is directly or indirectly mounted on the longitudinal slide plate 13 via a dressing wheel seat 174. Accordingly, the dressing electric spindle, carrying the dressing wheels, performs precise dressing on the first grinding wheel and / or the second grinding wheel.

[0052] Figure 2-5 In the structure shown, the dressing wheel system 17 includes two sets of bilaterally symmetrical dressing wheels 173 and a dressing electric spindle 172. The first grinding wheel 2 and the second grinding wheel 8 are each dressed by one dressing wheel 173. Accordingly, different dressing wheels can be configured according to the different functions of the first grinding wheel 2 and the second grinding wheel 8, improving the dressing accuracy. Each dressing wheel 173 is positioned adjacent to its respective dressing grinding wheel. The dressing wheel seat 174 is directly or indirectly mounted on the upper layer of the longitudinal slide, or indirectly mounted on the upper layer of the longitudinal slide in combination with other components.

[0053] In practice, the first transverse slide 5 and the second transverse slide 11 may not necessarily be located on the same horizontal plane. They can be tilted at an angle to the horizontal plane as needed, and the first transverse slide 5 and the second transverse slide 11 may even have a step difference in height. It is also not necessary for the first transverse slide 5 and the second transverse slide 11 to move laterally left and right on the same plane. The transverse movement directions of the two on the radial sides of the part 1 can intersect at an angle.

[0054] The longitudinal slide 13 can move horizontally or at an angle to the horizontal plane. However, in the grinding area, the axis 181 of the first support shaft and the axis 201 of the second support shaft must be perpendicular to the axis 101 of the part.

[0055] The process of grinding parts on a thread grinder is illustrated below:

[0056] The part 1 is loaded and installed between the power head system 15 and the support system 16. The power head system 15 positions and clamps the part 1.

[0057] Start the first spindle 3 and the second spindle 9 to rotate the first grinding wheel 2 and the second grinding wheel 8.

[0058] Align the position of the groove to be ground on the part with the geometric contour of the grinding wheel. Since the number of threads and lead of the thread grooves of different parts are different, an intermediate adjustment mechanism (such as a slide) that can be finely adjusted longitudinally is added between the first support 19 and the first transverse slide 5 or / and between the second support 21 and the second transverse slide 11. The support is mounted on the intermediate adjustment mechanism, and the intermediate adjustment mechanism is mounted on the transverse slide, so that the displacement of the first grinding wheel 2 and the second grinding wheel 8 in the direction of the axis 101 of the part can be finely adjusted.

[0059] Under the action of the third drive 14, the longitudinal slide 13 moves rapidly and drives the part 1 to the starting position of the part grinding.

[0060] Under the action of the first driver 7, the first grinding wheel 2 is rapidly moved into the grinding set position to achieve radial feed of the first grinding wheel 2.

[0061] Under the action of the second driver 12, the second grinding wheel 8 is rapidly moved into the grinding set position to achieve radial feed of the second grinding wheel 8.

[0062] Under the action of the third drive 14, the longitudinal slide 13 is moved and the part 1 is axially fed along its axis at a set speed; at the same time, the power head 15 starts the grinding CNC linkage and drives the part 1 to rotate at a set speed. Under the combined action, the part 1 is rotated and moved axially at the set requirements.

[0063] When the grinding wheel has finished grinding all the threads, all the transverse slides retract, the power head 15 stops rotating, and the longitudinal slide stops its axial feed.

[0064] All CNC processes involved in machining, including start position data, stop position data, machining process parameters, and trimming compensation data, are automatically memorized and logically controlled by the machine tool's electrical system.

[0065] If the grinding allowance of the part is large, a second and third round of grinding can be repeated until the design requirements are met.

[0066] After grinding is completed, the longitudinal slide 13 is moved rapidly under the action of the third drive 14, and the part 1 is moved to the starting position of grinding, and then unloaded.

[0067] Add more material and start the next cycle.

[0068] Equipped with a robotic arm for automatic loading and unloading, it achieves full automation of small lead screw thread grinding.

[0069] The process of dressing the grinding wheel on a thread grinder is illustrated below:

[0070] The first composite component 23 rotates around the axis 181 of the first support shaft, which simultaneously drives the first grinding wheel 2 and the first spindle 3 to rotate around the axis 181 of the first support shaft, so that the axis 301 of the first spindle 3 rotates to be parallel to the axis 101 of the part and located in the same plane, and the first support shaft is locked to fix the posture of the first grinding wheel 2 and the first spindle 3.

[0071] The second composite component 24 rotates around the axis 201 of the second support shaft, which in turn drives the second grinding wheel 8 and the second spindle 9 to rotate around the axis 201 of the second support shaft, so that the axis 901 of the second spindle 9 rotates to be parallel to the axis 101 of the part and located in the same plane, and the first support shaft is locked to fix the posture of the second grinding wheel 8 and the second spindle 9.

[0072] Start the first spindle 3, the second spindle 9 and the dressing spindle 172 to make them rotate.

[0073] The first transverse slide 5 moves under the action of the first driver 7, and the longitudinal slide 13 moves under the action of the third driver 14. The first transverse slide 5 and the longitudinal slide 13 can be CNC-controlled to move out of a plane coordinate system as needed. The dressing wheel 173 on the longitudinal slide 13 can dress the first grinding wheel 2 on the first transverse slide 5 to create the desired contour shape.

[0074] After the first grinding wheel 2 is dressed, the first transverse slide 5 retracts to its original set position; simultaneously, the first composite component 23 drives the first grinding wheel 2, the first spindle 3, etc. to rotate around the axis 181 of the first support shaft to the tilt angle set for grinding, which is consistent with the guide direction and angle of the thread groove in the area to be ground of the part, and locks the first support shaft to fix the posture of the first grinding wheel 2 and the first spindle 3.

[0075] The second transverse slide 11 moves under the action of the second driver 12, and the longitudinal slide 13 moves under the action of the third driver 14. The second transverse slide 11 and the longitudinal slide 13 can be CNC dressed and linked as needed to move out of a planar coordinate system. The dressing wheel 173 on the longitudinal slide 13 can dress the second grinding wheel 8 on the second transverse slide 11 to achieve the desired contour shape.

[0076] After the second grinding wheel 8 is dressed, the second transverse slide 11 retracts to its original set position; simultaneously, the second composite component 24 drives the second grinding wheel 8, the second spindle 9, etc. to rotate around the axis 201 of the second support shaft to the tilt angle set for grinding, which is consistent with the guide direction and angle of the thread groove in the area to be ground on the part, and locks the second support shaft to fix the posture of the second grinding wheel 8 and the second spindle 9.

[0077] Under the action of the third drive 14, the longitudinal slide 13 moves back to the set position, and the trimming electric spindle 172 stops rotating.

[0078] The repair process is complete.

[0079] As described above, by arranging the first grinding wheel 2 and the second grinding wheel 8 on both radial sides of part 1, the first grinding wheel and the second grinding wheel can simultaneously perform rough grinding and fine grinding on the part, taking into account the part's accuracy, surface quality, and efficiency. This overcomes the defects of difficulty in tool setting or even scrapping due to different thread profiles in different machining steps, resulting in parts with higher machining accuracy, better surface morphology, improved production efficiency, and reduced manufacturing costs.

[0080] By integrating the power head system 15, support system 16, and dressing wheel system 17 onto the longitudinal slide 13, the clamping of parts, axial feeding, and dressing of the first grinding wheel 2 and the second grinding wheel 8 are achieved. Furthermore, the structure is compact, saving on the drive unit and slide, and reducing the manufacturing cost of the equipment.

Claims

1. A small-scale special CNC thread grinding machine, characterized by: include: A longitudinal slide (13) that can be driven to move back and forth longitudinally by a third drive (14) is provided on the longitudinal slide (13) for holding one end of the part (1) and driving the part to rotate, a support system (16) for holding the other end of the part (1), and a dressing wheel system (17) for dressing the grinding wheel. The rotation axis (151) of the power head system is coaxial with the axis (101) of the part and parallel to the rotation axis (171) of the dressing wheel system and the direction of movement of the longitudinal slide. The first grinding wheel (2) and the second grinding wheel (8) are arranged on both radial sides of the part (1). The first grinding wheel (2) is coaxially arranged on the first spindle (3) and can be moved laterally left and right by the first transverse slide (5) under the drive of the first driver (7). The second grinding wheel (8) is coaxially arranged on the second spindle (9) and can be moved laterally left and right by the second transverse slide (11) under the drive of the second driver (12). The electrical program control system controls the rotation of the first spindle (3), the second spindle (9), the power head system (15), the dressing wheel system (17), and the movement of the first transverse slide (5), the second transverse slide (11), and the longitudinal slide (13) to dress the grinding wheel and process parts. The rotation of the part driven by the power head system (15) and the longitudinal forward and backward movement driven by the third driver (14) are CNC linked and can be processed by the first grinding wheel (2) and the second grinding wheel (8) at the same time.

2. The small special CNC thread grinding machine according to claim 1, characterized in that: The first spindle (3) is mounted on the first spindle seat (4), which is directly or indirectly mounted on the first transverse slide (5), which is mounted on one side of the bed (6); the second spindle (9) is mounted on the second spindle seat (10), which is directly or indirectly mounted on the second transverse slide (11), which is mounted on the other side of the bed (6); the longitudinal slide (13) is mounted in the middle of the bed (6) in the left-right direction and is located between the first transverse slide (5) and the second transverse slide (11).

3. The small special CNC thread grinding machine according to claim 2, characterized in that: The first spindle seat (4) is directly or indirectly mounted on a first composite component (23) having a rotatable first support shaft (18). The axis (181) of the first support shaft is perpendicular to the axis (101) of the part. The first support shaft (18) is directly or indirectly mounted on a first bracket (19). The first bracket (19) is directly or indirectly mounted on a first transverse slide (5). The first support shaft can rotate around the axis (181) of the first support shaft to adjust the posture of the first grinding wheel (2).

4. The small special CNC thread grinding machine according to claim 3, characterized in that: The axis (181) of the first support shaft intersects the first grinding wheel (2) at the center of the geometric profile of the outer circle of the first grinding wheel (2).

5. The small special CNC thread grinding machine according to any one of claims 2-4, characterized in that: The second spindle seat (10) is directly or indirectly mounted on the second composite component (24) having a rotatable second support shaft (20). The axis (201) of the second support shaft is perpendicular to the axis (101) of the part. The second support shaft (20) is directly or indirectly mounted on the second bracket (21). The second bracket (21) is directly or indirectly mounted on the second transverse slide (11). The second support shaft can rotate around the axis (201) of the second support shaft to adjust the posture of the second grinding wheel (8).

6. The small special CNC thread grinding machine according to claim 5, characterized in that: The axis (201) of the second support shaft intersects the second grinding wheel (8) at the center of the outer circle geometric profile of the second grinding wheel (8).

7. The small special CNC thread grinding machine according to claim 1 or 2, characterized in that: The longitudinal slide (13) is composed of an upper slide (131) and a lower slide (132) stacked together. The upper slide (131) can rotate slightly relative to the lower slide (132) around the pivot (22) and be locked. The power head system (15), support system (16) and dressing wheel system (17) are mounted on the upper slide (131) and arranged in a front-rear longitudinal configuration.

8. The small special CNC thread grinding machine according to claim 1 or 2, characterized in that: The power head system (15) includes a drive actuator (152) with a central through hole that can drive the part (1) to rotate, a front center system (154) that passes through the central through hole of the drive actuator (152) and is directly or indirectly fixed to the longitudinal slide, and a clamp (153) installed at the front end of the drive actuator (152) for clamping the part (1).

9. The small special CNC thread grinding machine according to claim 1 or 2, characterized in that: The dressing wheel system (17) includes at least one set of dressing wheels (173) and a dressing electric spindle (172). The dressing wheels (173) are coaxially mounted on the dressing electric spindle (172), and the dressing electric spindle (172) is directly or indirectly mounted on the longitudinal slide plate (13) through the dressing wheel seat (174).

10. The small special CNC thread grinding machine according to claim 9, characterized in that: The dressing wheel system (17) includes two sets of left-right symmetrical dressing wheels (173) and a dressing electric spindle (172), and the first grinding wheel (2) and the second grinding wheel (8) are each dressed by a dressing wheel (173).

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