Lead screw groove grinding equipment

Abstract

The utility model discloses grinding equipment for a lead screw groove, which belongs to the manufacturing technology of precision machinery, solves the problem that the machining precision of the lead screw in the prior art and equipment is low, and adopts the structure that a tensioned annular ring rope is driven to rotate around a wheel set, and one section of the annular ring rope is used as a working section; the working section makes contact with the lead screw groove and moves relative to the lead screw groove in the extending direction of the working section to grind the surface of the lead screw groove. And the lead screw is driven to rotate around the main axis, the annular ring rope and the lead screw do relative axial movement in the direction of the main axis, and the working section of the annular ring rope does spiral movement relative to the lead screw in the spiral extending direction of the lead screw groove so as to continuously grind the lead screw groove in the spiral extending direction of the lead screw groove. The annular ring rope has flexibility, can be matched with the lead screw groove, keeps tension to be in contact with the lead screw groove, can conduct precise grinding on the surface of the lead screw groove, and improves the surface quality of the lead screw groove.

Description

TECHNICAL FIELD

[0001] The utility model belongs to precision machinery manufacturing technology, specifically relates to a screw groove grinding equipment. BACKGROUND

[0002] With the rise and development of emerging industries such as precision manufacturing, industrial mother machine, industrial automation and digital control, humanoid robot, automatic driving technology, the requirements of high speed, high bearing, low torque, low noise, long life of various screws are higher and higher, and the requirements of part machining precision and surface morphology quality are continuously improved.

[0003] The existing screw machining process and equipment only have forming grinding process, do not have grinding process, the machining precision of screw is lower, gradually difficult to meet new requirements. CONTENT OF UTILITY MODEL

[0004] The utility model provides a technical task to overcome the defects of low machining precision of existing machining process and equipment to screw, and provides a screw groove grinding equipment, which aims at improving the machining precision of screw.

[0005] In order to achieve the above object, the screw groove grinding equipment of the utility model comprises:

[0006] A clamping and driving system for clamping the screw and driving the screw to rotate around the main shaft line;

[0007] A grinding system comprising a wheel set and a ring-shaped loop rope, the ring-shaped loop rope is looped around the wheel set, is tensioned by the wheel set and is rotated by the wheel set, and the section of the ring-shaped loop rope between two adjacent wheels in the wheel set is used as a working section;

[0008] The clamping and driving system or / and the grinding system is movably arranged to adjust the relative attitude of the working section and the screw and the grinding feeding and grinding disengagement of the working section and the screw groove.

[0009] Accordingly, the screw is installed to the clamping and driving system, the screw is clamped by the clamping and driving system and is driven to rotate around the main shaft line, the relative attitude of the working section and the screw is adjusted by the movement of the clamping and driving system or / and the grinding system, the working section of the ring-shaped loop rope is contacted and matched with the screw groove to realize grinding feeding, and the working section of the ring-shaped loop rope is withdrawn from the screw groove to realize grinding disengagement after grinding is completed. The precision grinding machining of the screw groove is completed.

[0010] Preferably, the clamping driving system comprises a first clamp, a first seat, a power spindle, a second clamp, a second seat, the first clamp is mounted on the power spindle, the power spindle is directly or indirectly arranged on the lathe bed through the first seat; the second clamp is directly or indirectly arranged on the lathe bed through the second seat. Accordingly, one end of the lead screw is clamped by the first clamp, the other end of the lead screw is limited by the second clamp, the power spindle can drive the lead screw to rotate around the spindle axis through the first clamp. When the lead screw is not mounted on the clamp, the spindle axis is embodied as the axis of the power spindle, and the axis of the power spindle is more specifically embodied as the line connecting the geometric center of the first clamp and the geometric center of the second clamp or the line connecting the rotation center of the first clamp and the rotation center of the second clamp.

[0011] Preferably, the first seat or / and the second seat can be adjusted in position along the direction of the spindle axis. The interval between the first clamp and the second clamp is adjusted to adapt to the lead screw of different lengths.

[0012] Preferably, the first seat and the second seat can be driven to move synchronously along the direction of the spindle axis. Accordingly, the lead screw is moved along the direction of the spindle axis, and the axial feed of the lead screw relative to the working section of the ring-shaped cord is realized.

[0013] Preferably, the working section can rotate around the rotation axis in the plane containing the center line and parallel to the spindle axis to adjust the relative attitude of the working section and the lead screw and be locked. The adjustment of the relative attitude of the working section and the lead screw aims to adjust the relative attitude of the working section and the lead screw groove, especially to make the movement direction of the working section consistent with the lead angle direction of the lead screw groove. To ensure the engagement of the working section of the ring-shaped cord and the lead screw groove, the original macro profile precision of the lead screw groove is maximally protected.

[0014] Preferably, the wheel set comprises a driving wheel, a driven wheel and a tensioning wheel which are directly or indirectly arranged on a mounting plate, the mounting plate is directly or indirectly arranged on a component through the rotation axis. Accordingly, by installing a similar automatic tensioning wheel for the belt of the automobile engine, the rotation and tensioning of the entire ring-shaped cord are kept stable, and its appropriate working state is maintained.

[0015] Preferably, the component can drive the mounting plate to move in the radial direction of the lead screw under the action of the first driver to realize the grinding feed and grinding disengagement of the working section and the lead screw groove.

[0016] Preferably, the working section can be driven to move along the direction of the spindle axis. Accordingly, the axial feed of the working section and the lead screw groove is realized.

[0017] Preferably, the wheel set comprises a driving wheel, a driven wheel and a tension wheel, which are directly or indirectly arranged on a mounting plate, the mounting plate is directly or indirectly arranged on a member through a rotating shaft, the member is directly or indirectly arranged on a slide plate, the slide plate is directly or indirectly arranged on a bed, the slide plate can be driven by a second driver to move along the main axis. Accordingly, the slide plate is driven by the second driver to move along the main axis, and the work section is moved along the main axis, so as to realize the axial feeding of the work section and the screw groove.

[0018] Preferably, at least two annular loop ropes are arranged on the wheel set in parallel, and the distance between adjacent annular loop ropes along the main axis is the profile normal distance between adjacent screw grooves. When the screw is single-headed, that is, the screw has one screw groove extending spirally, the at least two annular loop ropes can simultaneously implement repeated grinding on the same screw groove extending spirally. When the screw is at least two-headed, that is, the screw has screw grooves extending spirally corresponding to the number of heads, the distance between the at least two annular loop ropes can be set to simultaneously implement grinding on the same screw groove extending spirally, or can be set to simultaneously implement synchronous grinding on all screw grooves extending spirally. Accordingly, the grinding efficiency is increased.

[0019] Preferably, two grinding systems are arranged, and the work sections of the annular loop ropes of the two grinding systems are located on opposite sides of the main axis. Accordingly, the grinding efficiency is increased. When the screw is single-headed, that is, the screw has one screw groove extending spirally, the annular loop ropes of the two grinding systems can simultaneously implement grinding on the same screw groove extending spirally. When the screw is at least two-headed, that is, the screw has screw grooves extending spirally corresponding to the number of heads, the annular loop ropes of the two grinding systems can simultaneously implement grinding on one of the screw grooves extending spirally, and then simultaneously implement grinding on the other screw groove extending spirally; or simultaneously implement grinding on all screw grooves extending spirally, so as to increase the grinding efficiency.

[0020] The utility model discloses a drive tensioned annular ring rope around the wheel group rotation, make the work section contact screw groove and along the extension direction of itself relative screw groove movement to grind the surface of screw groove, simultaneously, drive screw rotation around the main shaft line, and make annular ring rope and screw along the direction of main shaft line make relative axial movement, make the work section of annular ring rope along the helical extension direction of screw groove make relative screw helical movement to along the helical extension direction of screw groove to the continuous grinding of screw groove of screw. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the axial side view of the screw groove grinding equipment of the utility model embodiment 1;

[0022] Figure 2 It is the side view of the screw groove grinding equipment of the utility model embodiment 1; Figure 1

[0023] Figure 3 It is the side view of the screw groove grinding equipment of the utility model embodiment 1; Figure 2

[0024] Figure 4 It is the schematic diagram of the clamping drive system in the utility model embodiment 1; Figure 1

[0025] Figure 5 It is the schematic diagram of one grinding system in the utility model embodiment 1; Figure 1

[0026] Figure 6 It is the schematic diagram of the wheel group and annular ring rope of one grinding system in the utility model embodiment 1; Figure 1

[0027] Figure 7 It is the schematic diagram of another wheel group and annular ring rope of the utility model;

[0028] Figure 8 It is the axial side view of the screw groove grinding equipment of the utility model embodiment 2;

[0029] Figure 9 It is the axial side view of the screw groove grinding equipment of the utility model embodiment 3; ​​​​​

[0030] Figure 10 Figure 1 is a schematic diagram of a work section of the utility model for grinding the screw grooves of two screws simultaneously;

[0031] Figure caption:

[0032] 1 grinding system, 11 endless loop rope, 111 work section, 112 center line, 12 driving wheel, 13 driven wheel, 14 tension pulley, 15 grinding driver, 2 mounting plate, 3 screw, 31 main axis, 32 screw groove, 33 vertical plane, 4 clamping driving system, 41 first clamp, 42 power spindle, 43 first seat, 44 second clamp, 45 second seat, 5 component, 6 first driver, 7 sliding plate, 8 bed, 9 second driver, 10 rotating shaft. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the embodiment of the utility model will be described clearly and completely in the embodiment of the utility model below, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0034] The terms "include" and "have" and any variations thereof in the specification and claims of the utility model are intended to cover the non-exclusive inclusion, for example, a method or product including a series of technical features does not have to be limited to the clearly listed technical features, and other technical features that can be included in the method or product without being clearly listed can also be included.

[0035] In the description of the utility model, it is understood that the technical features defined by the terms "first", "second" and the like have the concept of order, only for the purpose of clearly describing the defined technical features, so that the defined technical features can be clearly distinguished from other technical features, and it does not represent the actual implementation of such naming, therefore, it cannot be understood as a limitation of the utility model.

[0036] In this application, the screw groove refers to a continuous spiral groove extending from one end of the screw to the other end of the screw. Therefore, the number of screws is the number of screw grooves.

[0037] The utility model will be described in detail below in combination with specific embodiments and drawings.

[0038] Embodiment 1

[0039] Figures 1-3A lead screw groove grinding device is shown, which includes a clamping drive system 4 and a grinding system 1.

[0040] The clamping drive system 4 is used to clamp the lead screw 3 and drive the lead screw to rotate around the main axis 31. For example... Figure 4 As shown, the clamping drive system 4 includes a first clamp 41, a first seat 43, a power spindle 42, a second clamp 44, and a second seat 45. The first clamp 41 is mounted on the power spindle 42. The power spindle 42 is directly or indirectly mounted on the bed 8 via the first seat 43. The second clamp 44 is directly or indirectly mounted on the bed 8 via the second seat 45. Accordingly, during the grinding of the lead screw 3, one end of the lead screw 3 is clamped by the first clamp 41, and the other end of the lead screw 3 is limited by the second clamp 44. The power spindle 42 drives the lead screw 3 to rotate around the main axis 31 via the first clamp 41. The main axis 31 is the axis of the lead screw 3. When the lead screw is not mounted on the clamp, the main axis 31 is the axis of the power spindle 42, which is more specifically represented by the line connecting the geometric center of the first clamp 41 and the geometric center of the second clamp 44, or the line connecting the rotation center of the first clamp and the rotation center of the second clamp.

[0041] In this embodiment, the first seat 43 and the second seat 45 can be adjusted in position along the main axis 31 to adjust the distance between the first clamp 41 and the second clamp 44, suitable for clamping lead screws of different lengths. In other embodiments, only the first seat or the second seat can be adjusted in position along the main axis.

[0042] In this application, the direction along the main axis 31 refers to the direction that is consistent with the extension direction of the main axis, which can be either the extension direction of the main axis or a direction parallel to the main axis.

[0043] In this embodiment, the first seat 43 and the second seat 45 can be driven to move synchronously along the main axis 31. Accordingly, the lead screw moves along the main axis, and the lead screw groove 32 is axially fed into the working section 111 relative to the working section of the annular rope.

[0044] In other embodiments, the working section 111 may be driven to move along the main axis 31. Accordingly, the axial feed of the working section 111 into the lead screw groove 32 is achieved by moving the working section 111 along the main axis 31. Specifically, the component 5 is directly or indirectly mounted on the slide plate 7, the slide plate 7 is directly or indirectly mounted on the bed 8, and the slide plate 7 may be driven by the second drive 9 to move along the main axis 31.

[0045] like Figures 5-6As shown, the grinding system 1 mainly comprises a wheel set and a ring-shaped loop 11. The wheel set comprises a driving wheel 12, a driven wheel 13 and a tension wheel 14 which directly or indirectly set up the mounting plate 2. The ring-shaped loop 11 is looped around the wheel set, is tensioned by the wheel set and is rotated around the wheel set by the wheel set. The section of the ring-shaped loop 11 between the driving wheel 12 and the driven wheel 13 is the working section 111. Therefore, the working section 111 is a section of the ring-shaped loop 11 at a specific position, not a fixed position on the ring-shaped loop. As the ring-shaped loop rotates, the ring-shaped loop continuously and cyclically passes through the specific position as the working section. The driving wheel 12 is driven to rotate by a grinding driver 15, so that the ring-shaped loop 11 looped around the wheel set and tensioned by the tension wheel is rotated.

[0046] In this embodiment, the clamping driving system 4 or / and the grinding system 1 is movable to adjust the relative attitude of the working section 111 and the screw 3 and the grinding engagement and disengagement of the working section and the screw groove. In other embodiments, the clamping driving system can be movable or both the clamping driving system and the grinding system can be movable to adjust the relative attitude of the working section and the screw and the grinding engagement and disengagement of the working section and the screw groove.

[0047] In this embodiment, in order to adjust the relative attitude of the working section 111 and the screw 3, the working section 111 can be rotated around the rotating shaft 10 in a plane containing the center line 112 and parallel to the main axis 31 to adjust the relative attitude of the working section and the screw and be locked. Adjusting the relative attitude of the working section and the screw aims to adjust the relative attitude of the working section 111 and the screw groove 32, especially to make the extension direction of the working section along the helical extension direction of the screw groove at the part contacting the screw groove, so as to ensure the engagement of the working section of the ring-shaped loop and the screw groove and to maximize the protection of the original macro profile accuracy of the screw groove. Specifically, the mounting plate 2 is directly or indirectly arranged on a member 5 through the rotating shaft 10. Accordingly, by mounting a similar automatic belt tensioner for a car engine, the rotation and tension of the entire ring-shaped loop remain unchanged, maintaining its appropriate stable state. The member 5 can move the mounting plate 2 relative to the radial direction of the screw 3 under the action of the first driver 6 to realize the grinding engagement and disengagement of the working section 111 and the screw groove 32.

[0048] Accordingly, the screw 3 is mounted to the clamping driving system 4, the clamping driving system 4 clamps the screw 3 and drives the screw to rotate around the main axis 31, and the relative attitude of the working section 111 and the screw 3 is adjusted by the movement of the grinding system 1. Preferably, as shown in the figure, the member 5 is arranged on the rotating shaft 10, and the rotating shaft 10 is arranged on the mounting plate 2. The member 5 is arranged on the rotating shaft 10, and the rotating shaft 10 is arranged on the mounting plate 2. The member 5 is arranged on the rotating shaft 10, and the rotating shaft 10 is arranged on the mounting plate 2. Figure 3As shown, the relative posture is preferably that the extension direction of the working section 111 follows the helical extension direction of the screw groove 32 at the position where the working section 111 contacts the screw groove 32, i.e. the extension direction of the working section 111 forms an acute angle a with the main axis 31, and the sum of the acute angle a and the lead angle γ of the screw groove 32 is 90°. Figure 3 In the figure, the acute angle a is marked as the angle between the center line 112 of the working section 111 and the main axis 31; the lead angle γ is marked as the angle between the center line 112 of the working section 111 and the perpendicular plane 33 of the main axis 31. The center line 112 of the working section 111 is shown to be consistent with the tangential direction of the helically extending screw groove 32. The working section 111 of the ring-shaped loop rope 11 is contacted and fitted with the screw groove 32 to achieve grinding feeding, and the working section 111 of the ring-shaped loop rope is withdrawn from the screw groove 32 after grinding is completed to achieve grinding disengagement. The precise grinding processing of the screw groove is completed.

[0049] In this embodiment, two grinding systems are arranged on the same wheel set. Figure 6 As shown in the grinding system 1, the working sections 111 of the ring-shaped loop ropes of the two grinding systems are separately arranged on the opposite sides of the main axis 31, and the working sections 111 of the ring-shaped loop ropes of the two grinding systems are inclined to the main axis in different directions to be fitted with the corresponding screw grooves. When the screw is single-headed, i.e. the screw has one helically extending screw groove, the ring-shaped loop ropes of the two grinding systems can simultaneously perform grinding on the same helically extending screw groove. When the screw is at least two-headed, i.e. the screw has a corresponding number of helically extending screw grooves, the ring-shaped loop ropes of the two grinding systems can simultaneously perform grinding on the same helically extending screw groove, or simultaneously perform grinding on all the helically extending screw grooves. In this way, the grinding efficiency is increased.

[0050] In other embodiments, the grinding system shown in the figure can be replaced by Figure 7 the grinding system shown in the figure. Figure 6 the grinding system shown in the figure. Figure 7 The grinding system shown in the figure is that at least two ring-shaped loop ropes 11 are arranged in parallel on the wheel set, and the distance between the adjacent ring-shaped loop ropes 11 along the direction of the main axis is the profile normal distance between the adjacent grooves of the screw 3. When the screw is single-headed, i.e. the screw has one helically extending screw groove, the at least two ring-shaped loop ropes can simultaneously perform repeated grinding on the same helically extending screw groove. When the screw is at least two-headed, i.e. the screw has a corresponding number of helically extending screw grooves, the distance between the at least two ring-shaped loop ropes can be set to simultaneously perform grinding on the same helically extending screw groove, or simultaneously perform grinding on all the helically extending screw grooves. In this way, the grinding efficiency is increased.

[0051] In this embodiment, the screw 3 (main axis 31) is arranged vertically. Correspondingly, the working sections 111 of the ring-shaped loop ropes of the two grinding systems are separately arranged on the left and right sides of the screw.

[0052] Embodiment 2

[0053] Figure 8 Another embodiment of the screw groove grinding apparatus is shown, in which the screw 3 (main axis 31) is arranged transversely compared with the grinding apparatus of Embodiment 1. This is equivalent to turning the grinding apparatus of Embodiment 1 by 90 degrees to make the screw 3 (main axis 31) lie transversely. In this embodiment, only one grinding system is arranged. Figure 6 The grinding system 1 is shown. The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be described again.

[0054] Embodiment 3

[0055] Figure 9 Another embodiment of the screw groove grinding apparatus is shown, in which the screw 3 (main axis 31) is arranged transversely compared with the grinding apparatus of Embodiment 1. This is equivalent to turning the grinding apparatus of Embodiment 1 by 90 degrees to make the screw 3 (main axis 31) lie transversely. In this embodiment, only one grinding system is arranged. Figure 6 The grinding system 1 is shown. The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be described again.

[0056] Compared with Embodiment 2, this embodiment changes the relative positions of the clamping drive system and the grinding system.

[0057] The above embodiments can be implemented for grinding according to the three processes of adjustment, work and end.

[0058] 1. Adjustment

[0059] The screw 3 to be ground is mounted between the first clamp 41 and the second clamp 44.

[0060] The mounting plate 2 is moved close to the screw 3 by the first drive 6.

[0061] The working section 111 of the endless loop rope 11 is moved close to the screw groove 32 by jogging the slide plate 7 with the second drive 9.

[0062] The angle of the mounting plate 2 relative to the main axis 31 (screw 3) is adjusted by the rotation shaft 10, so that the extension direction of the working section 111 at the position of contacting the screw groove 32 is along the helical extension direction of the screw groove 32, as shown. Figure 3

[0063] The mounting plate 2 is moved again by the first drive 6, so that the working section 111 contacts the screw groove 32 (i.e. the surface of the screw groove 32) and keeps the radial pressing force relative to the main axis 31.

[0064] If the grinding system is arranged on both radial sides of the screw, the grinding system on the other radial side of the screw 3 is adjusted according to the above process. ​

[0065] After the adjustment, the first drive 6 drives the grinding system 1 to move radially to a parking position away from the screw 3, and the second drive 9 drives the slide 7 to move along the main axis 31 to move the grinding system 1 to a machining starting position along the screw axis.

[0066] 2. Operation

[0067] The grinding drive 15 is started, and the endless loop 11 is rotated around the wheel set by the driving wheel.

[0068] The power spindle 42 is started, and the screw 3 is rotated around the main axis 31 by the first clamp 41; at the same time, the slide 7 and the endless loop 11 of the grinding system are axially moved along the main axis 31 under the action of the second drive 9.

[0069] The screw 3 rotates around the main axis while synchronously moving axially along the main axis relative to the working section 111 of the endless loop. Therefore, the screw rotates while moving axially along the helical direction of the screw groove, and 360° rotation of the screw moves the screw axially by one pitch. The pitch is the product of the adjacent groove pitch and the number of threads of the screw, so when the screw is single-threaded, 360° rotation of the screw moves the screw axially by one pitch. When the screw is multi-threaded, 360° rotation of the screw moves the screw axially by the product of the adjacent groove pitch and the number of threads.

[0070] The grinding agent is added to the grinding contact. Preferably, the grinding agent is made into a flowable fluid or paste, and is poured at the grinding contact by pumping.

[0071] The working section 111 is brought into contact with the screw groove 32 by the first drive 6. The endless loop 11 is continuously rotated under the action of the driving wheel 12, and the endless loop 11 rubs against the surface of the screw groove to implement grinding.

[0072] As the screw 3 moves along the main axis, the helically extending screw groove 32 continuously contacts and rubs against the working section 111 of the endless loop, so that the working section 111 grinds the screw groove from one end to the other end of the screw groove. When the working section 111 of the endless loop reaches the position of the other end of the screw groove, a trigger signal is generated to reverse the rotation of the screw and axially move the screw to the starting point. According to the process requirements, the grinding can be repeated several times.

[0073] If a multi-threaded screw is involved, the working sections 111 of the endless loops corresponding to the number of threads of the screw can be used to grind one groove together, and then another groove; or the working sections 111 of the endless loops corresponding to the number of threads of the screw can be used to grind one groove respectively and simultaneously. Among them, the working sections 111 of the endless loops corresponding to the number of threads of the screw can be as follows Figure 7The working section 111 shown in parallel on the same wheel group can also be the working section 111 of different annular ring of different grinding system arranged on the radial side of the screw.

[0074] 3. End

[0075] The grinding is finished, and the mounting plate 2 retreats under the action of the first driver 6.

[0076] The power spindle 42 driving the screw to rotate is synchronously stopped.

[0077] The second driver 9 drives the sliding plate 7 to move along the direction of the main axis, and makes the working section 111 of the annular ring retreat to the machining starting position of the screw in the axial direction.

[0078] The clamp is loosened, and the screw is unloaded.

[0079] The above working process is realized by moving the screw along the main axis to realize the axial feed, and in other working processes, the grinding system can be moved along the main axis to realize the axial feed.

[0080] As described above, the grinding equipment of the utility model realizes the following screw groove grinding method:

[0081] The annular ring 11 is driven to rotate around the wheel group, one section of the annular ring 11 is taken as the working section 111, the working section 111 contacts the screw groove 32 and moves along the extension direction of the working section 111 to grind the surface of the screw groove;

[0082] The screw 3 is driven to rotate around the main axis 31, and the annular ring 11 and the screw 3 are relatively axially moved along the direction of the main axis 31, so that the working section 111 of the annular ring moves along the spiral extension direction of the screw groove 32 relative to the screw 3 to continuously grind the screw groove along the spiral extension direction of the screw groove.

[0083] Among them, the working section 111 grinds the screw groove 32, and the grinding agent is directly or indirectly injected into the grinding position.

[0084] Among them, the screw 3 or / and the annular ring 11 moves along the direction of the main axis 31 to make the screw 3 and the annular ring 11 relatively axially move.

[0085] Among them, the extension direction of the working section 111 follows the spiral extension direction of the screw groove 32 at the position contacting the screw groove 32.

[0086] Among them, the same number of annular rings 11 as the screw grooves 32 are arranged, and the working section 111 of each annular ring contacts one screw groove 32 respectively to simultaneously grind all the screw grooves.

[0087] The system includes at least two annular loops 11, which are distributed at different positions along the spiral extension direction of the same lead screw groove 32 to simultaneously grind the same lead screw groove 32.

[0088] When there are two or more lead screw grooves, each lead screw groove can be ground one by one with a single ring rope, or each lead screw groove can be ground simultaneously with two or more ring ropes.

[0089] Since the structure of the grinding system varies, such as the number of ring ropes, and the lead screw may have one, two or more lead screw grooves, as mentioned above, the grinding system can be replaced as needed, and the lead screw grooves can be ground as needed using lead screw groove grinding equipment, such as grinding the lead screw grooves one by one or grinding them simultaneously.

[0090] Among them, such as Figure 10 The method shown involves simultaneously contacting the grooves of at least two lead screws within the same annular rope working section to grind the grooves of both lead screws simultaneously, increasing grinding efficiency. At this time, the centerlines 31 of at least two lead screws are parallel to each other, ensuring that the groove projections of adjacent lead screws lie on a straight line n. Correspondingly, the clamping drive system 4 on the equipment is adapted to clamp a corresponding number of lead screws 3 and drive these lead screws to rotate around the main axis 31. Therefore, either the same clamping drive system can clamp and drive at least two lead screws, or each lead screw can be clamped and driven by a separate clamping drive system.

[0091] Since the cross-sectional profile of the loop rope is basically close to the profile of the lead screw groove, and the loop rope is flexible like the belt in the belt drive mechanism, it can fit with the lead screw groove. With the support of the automatic tensioning wheel, it maintains tension contact with the lead screw groove, which can perform precision grinding on the surface of the lead screw groove and improve the surface accuracy of the lead screw groove.

Claims

1. A screw groove grinding apparatus, characterized by The application relates to a grinding system (1) comprising: a clamping drive system (4) for clamping a screw rod (3) and driving the screw rod to rotate around a main axis (31); the grinding system (1) comprises a wheel set and a ring-shaped loop (11), the ring-shaped loop (11) is wound around the wheel set, is tensioned by the wheel set and rotates with the wheel set, and a section of the ring-shaped loop (11) between two adjacent wheels in the wheel set is a working section (111); the clamping drive system (4) or / and the grinding system (1) is arranged to adjust the relative posture of the working section (111) and the screw rod (3) and the grinding feed and grinding disengagement; the rotation of the screw rod (3) and the axial movement of the working section (111) relative to the screw rod groove (32) along the main axis (31) are synchronously performed according to a program.

2. The ball screw groove grinding apparatus according to claim 1, characterized by: The clamping drive system (4) comprises a first clamp (41), a first seat (43), a power spindle (42), a second clamp (44) and a second seat (45), the first clamp (41) is mounted on the power spindle (42), the power spindle (42) is directly or indirectly arranged on the bed (8) through the first seat (43); the second clamp (44) is directly or indirectly arranged on the bed (8) through the second seat (45).

3. The ball screw groove grinding apparatus according to claim 2, characterized by: The first seat (43) or / and the second seat (45) can be adjusted in position along the direction of the main axis (31).

4. The ball screw groove grinding apparatus according to claim 2, characterized by: The first seat (43) and the second seat (45) can be driven to synchronously move along the direction of the main axis (31).

5. The ball screw groove grinding apparatus according to claim 1, characterized by: The working section (111) can rotate around the rotating shaft (10) in a plane containing the center line (112) and parallel to the main axis (31) to adjust the relative posture of the working section (111) and the screw rod (3) and is locked.

6. The ball screw groove grinding apparatus according to claim 5, characterized by: The wheel set comprises a driving wheel (12), a driven wheel (13) and a tensioning wheel (14) which are directly or indirectly arranged on a mounting plate (2), the mounting plate (2) is directly or indirectly arranged on a component (5) through the rotating shaft (10).

7. The ball screw groove grinding apparatus according to claim 6, characterized by: The component (5) can drive the mounting plate (2) to move in the radial direction of the screw rod (3) to realize the grinding feed and grinding disengagement of the working section (111) and the screw rod groove (32) under the action of the first driver (6).

8. The ball screw groove grinding apparatus according to claim 1, characterized by: The working section (111) can be driven to move along the direction of the main axis (31).

9. The ball screw groove grinding apparatus according to claim 8, characterized by: The wheel set comprises a driving wheel (12), a driven wheel (13) and a tensioning wheel (14) which are directly or indirectly arranged on a mounting plate (2), the mounting plate (2) is directly or indirectly arranged on a component (5) through the rotating shaft (10); the component (5) is directly or indirectly arranged on a sliding plate (7), the sliding plate (7) is directly or indirectly arranged on the bed (8), and the sliding plate (7) can be driven to move along the direction of the main axis (31) by the second driver (9).

Images