High-precision diamond pen grinding wheel dresser with micro-feeding function

Abstract

The present application belongs to the field of precision machining, and relates to a high-precision diamond pen grinding wheel dresser with micro-feeding function, comprising an outer shaft sleeve, an inner shaft, a feeding shaft sleeve, a feeding screw, a diamond pen sleeve, a diamond pen, a screw baffle, a dense bead and a dial. The outer shaft sleeve and the inner shaft are two matched parts connected by a dense bead after wire cutting of a cylindrical workpiece, and a double-V dense bead guide rail structure is adopted to obtain higher linear motion precision; the feeding shaft sleeve and the inner shaft are connected through interference fit to ensure no relative motion during dressing of the grinding wheel; the feeding shaft sleeve and the feeding screw adopt a fine-tooth tight-fit threaded pair to realize micro-feeding of the diamond pen; the inner hole of the diamond pen sleeve is an irregular hole, and the diamond pen is clamped in a one-point two-line manner by tightening the second set screw, so that the structure is more stable. The present application has high structural stiffness and dressing precision, is convenient to operate, and has a reverse self-locking function.

Description

Technical Field

[0001] This invention belongs to the field of precision machining technology and relates to a high-precision diamond pen wheel dresser with micro-feed function. Background Technology

[0002] Grinding, as a crucial step in finishing, has become the preferred process for parts made of materials such as carbon tool steel and carburized, nitrided, and quenched steel due to its characteristics of small machining allowances and high machining accuracy. The grinding wheel, as the "tool" in grinding, directly affects the workpiece's machining quality. Differences in linear velocity at different positions on the grinding wheel lead to uneven wear, especially in grinding complex surfaces (such as symmetrical double-cone surfaces). This uneven wear can damage the original geometric accuracy of the grinding wheel. In traditional dressing processes, the sliding guide rails have poor vibration absorption and weak rigidity, easily causing chatter marks on the grinding wheel surface, affecting the final machining accuracy of the workpiece. Grinding wheels experience wear, dulling, or contour distortion during grinding, requiring periodic dressing. The dressing accuracy of the grinding wheel directly determines the workpiece's surface quality and shape accuracy. High-precision dressers can achieve grinding wheel shape accuracy at the micron or even sub-micron level, meeting the demands of high-precision applications.

[0003] The core requirements of grinding wheel dressers revolve around restoring the geometry, cutting performance, and surface quality of the grinding wheel, thereby ensuring the accuracy, efficiency, and workpiece surface quality of the grinding process. A diamond pen grinding wheel dresser is a precision structure whose core function is to control the relative movement between the diamond pen and the grinding wheel to achieve high-precision, high-efficiency grinding wheel surface dressing. Its basic working principle is to guide the diamond pen to perform micro-cutting on the rotating grinding wheel surface according to a predetermined trajectory and parameters through a precise motion mechanism. Invention patent [CN107471114B] "A High-Precision Diamond Pen Grinding Wheel Dresser and Assembly Method" provides a dresser based on a stepper motor drive and a precision sliding plastic-coated guide rail. It adopts a single V-shaped slider and plastic-coated guide rail structure, which can achieve high linear motion accuracy. However, this grinding wheel dresser itself does not have a dressing feed function, only providing reciprocating linear dressing motion. Furthermore, the V-shaped slider and guide rail are in surface contact, resulting in a higher coefficient of friction than rolling friction, which has a certain impact on the dressing motion.

[0004] The principle of a micrometer is essentially based on the transmission characteristics of a precision fine-pitch thread pair to convert the rotational motion of the micrometer screw into linear motion. One rotation results in an axial displacement of only one pitch. Therefore, by designing a thread pair with a smaller pitch, minute axial displacement can be achieved. Utilizing this characteristic of the micrometer, a precision fine-pitch thread pair can be used to drive the precise micro-feed of a diamond pen, thereby enabling the precise feed of a grinding wheel dresser.

[0005] Current diamond pen wheel dressers only provide the function of clamping and fixing the diamond pen, and do not have a feeding function. They rely on the movement of the machine tool to realize the dressing and feeding movements of the grinding wheel. The dressing feed accuracy and feed amount of the grinding wheel are difficult to control precisely, and the fine dressing of the grinding wheel cannot be achieved. Summary of the Invention

[0006] To address the problems of existing diamond pen wheel dressers lacking a feed function, difficulty in precisely controlling the dressing feed accuracy and amount, and inability to achieve fine dressing of grinding wheels, this invention proposes a high-precision diamond pen wheel dresser with micro-feed function, comprising: a diamond pen for dressing grinding wheels; a diamond pen sleeve fitted in the middle of the outer wall of the diamond pen; and an inner shaft fitted at the end of the outer wall of the diamond pen.

[0007] The diamond pen holder has a threaded hole on its side wall; a second set screw is installed inside the threaded hole; the diamond pen holder and the diamond pen are connected and fixed by the second set screw.

[0008] The diamond pen cap and the outer wall of the inner shaft are fitted with an outer shaft sleeve; the inner wall of the outer shaft sleeve has two right-angled V-shaped grooves with grooves at the bottom along the axial direction; the outer wall of the inner shaft has two right-angled V-shaped grooves with grooves at the bottom along the axial direction; the two right-angled V-shaped grooves of the outer shaft sleeve and the two right-angled V-shaped grooves of the inner shaft are matched in pairs to form two sets of double V-shaped guide rails; each of the two sets of double V-shaped guide rails is provided with a number of dense beads, forming two sets of double V dense bead structures;

[0009] A feed sleeve is fitted inside one end of the inner shaft; a feed sleeve shoulder is provided at one end of the feed sleeve; an internal thread is provided inside the feed sleeve; a feed screw is fitted inside the feed sleeve; one end of the feed screw has a cylindrical surface, and the other end has an external thread; a feed screw shoulder is provided between the cylindrical surface and the external thread; a feed screw hemisphere is provided on one end face of the external thread; the internal thread of the feed sleeve and the external thread of the feed screw form a feed thread pair;

[0010] A screw baffle and a dial are sequentially fitted on the cylindrical surface of the feed screw; the screw baffle is fixed to one end face of the outer bushing by a threaded connection; a dial shoulder is provided in the middle of the dial, and a dial sidewall threaded hole is provided on the outer sidewall of the dial; a first set screw is provided in the dial sidewall threaded hole; the dial and the feed screw fitted in it are connected and fixed by the first set screw.

[0011] According to the above-described high-precision diamond pen dressing tool with micro-feed function, the inner hole of the diamond pen sleeve is an irregular hole, so that the inner wall of the inner hole of the diamond pen sleeve and the outer wall of the diamond pen form two lines of contact; the outer wall of the diamond pen makes point contact with the second set screw, thereby forming a one-point two-line fixation of the diamond pen.

[0012] According to the above-described high-precision diamond pen dressing tool with micro-feed function, the inner hole of the diamond pen sleeve consists of two cylindrical surfaces with opposite radii; the threaded hole on the side wall of the diamond pen sleeve is located in the middle of the large-radius cylindrical surface, opposite to the small-radius cylindrical surface; after the second set screw locks the diamond pen, the outer wall of the diamond pen and the small-radius cylindrical surface form two line contacts.

[0013] According to the above-described high-precision diamond pen dressing tool with micro-feed function, the inner hole of the diamond pen sleeve is a combination structure of a cylindrical surface and a V-shaped groove with a groove at the bottom. The threaded hole on the side wall of the diamond pen sleeve is located in the middle of the cylindrical surface. After the second set screw locks the diamond pen, the outer wall of the diamond pen and the V-shaped surface of the V-shaped groove of the inner hole of the diamond pen sleeve form two line contacts.

[0014] According to the above-described high-precision diamond pen wheel dresser with micro-feed function, the outer bushing is a hollow cylindrical structure, the inner shaft is a hollow cylindrical structure, and the two sets of double V-shaped guide rails between the inner wall of the outer bushing and the outer wall of the inner shaft are interference-fitted with the dense beads; the dense beads can roll within the two sets of double V-shaped guide rails.

[0015] The V-shaped guide rail has a smaller coefficient of friction than the sliding friction of surface contact; the interference fit double V-shaped ball structure eliminates the gap between the outer bushing and the inner shaft, suppresses the relative rotational motion between the outer bushing and the inner shaft, maintains high straightness, and has high structural rigidity.

[0016] According to the above-described high-precision diamond pen wheel dresser with micro-feed function, the feed sleeve drives the inner shaft to move axially; the internal thread of the feed sleeve and the external thread of the feed screw are both fine threads, forming a fine thread pair, and the feed screw can adjust the axial feed amount of the feed sleeve slightly through the fine thread pair.

[0017] According to the above-described high-precision diamond pen dressing tool with micro-feed function, the diamond pen sleeve is coaxially and fixedly connected to the inner shaft.

[0018] According to the above-described high-precision diamond pen wheel dresser with micro-feed function, the screw baffle is fixedly connected to one end of the outer bushing with a thin-headed hexagonal screw; when relative movement occurs between the outer bushing and the inner shaft, the dense ball rolls purely in two sets of double V-shaped guide rails between the inner wall of the outer bushing and the outer wall of the inner shaft.

[0019] According to the above-described high-precision diamond pen wheel dresser with micro-feed function, the outer bushing and inner shaft are formed by wire cutting from a cylindrical workpiece.

[0020] According to the high-precision diamond pen dressing tool with micro-feed function described above, the interference fit between the two sets of double V-shaped guides and the inner wall of the outer bushing and the outer wall of the inner shaft is 1~5μm; the right-angle V-groove of the outer bushing and the right-angle V-groove of the inner shaft are finely ground, and their planar accuracy is ≤1μm, thereby improving the linear accuracy of the inner shaft relative to the outer bushing; the pitch of the fine thread pair that mates with the feed sleeve and the feed screw is 0.2~0.5mm; the extremely fine pitch of the fine thread pair improves the resolution of manual feed; the fine thread pair adopts a tight fit with a certain damping to avoid the axial clearance of the fine thread pair affecting the reliability and high rigidity of the diamond pen positioning; the dial is provided with evenly distributed graduations to indicate the feed amount.

[0021] The beneficial effects of this invention are as follows: 1. Significantly improves the accuracy and stability of the dressing motion. This invention uses two sets of double-V dense ball rolling structures to replace the traditional sliding guide rail. The dense balls and the two sets of double-V structure guide rails are interference-fitted (interference amount 1–5μm), effectively eliminating motion backlash and improving motion straightness and repeatability. Compared with surface-contact sliding guide rails in the prior art (such as the single-V plastic-coated guide rail used in patent CN107471114B), the rolling friction coefficient is lower, the motion is smoother, and chatter and contour distortion caused by insufficient guide rail stiffness are avoided, thereby significantly improving the accuracy and surface quality of grinding wheel dressing, especially suitable for high-precision complex surface dressing.

[0022] 2. Achieve micron-level precision feed and self-locking function. This invention draws upon the principle of micrometer screw gauges, employing a fine-pitch, tight-fitting threaded pair with a pitch of 0.2–0.5 mm to drive the feed bushing, achieving a micro-feed amount of 0.2–0.5 mm per revolution with high feed resolution. The threaded pair possesses reverse self-locking characteristics, effectively preventing backlash errors during the dressing process and ensuring stable feed. Compared to existing dressers that rely on machine tool feed, this invention achieves the dresser's own precision micro-feed function, providing more independent and precise feed control, suitable for ultra-precision dressing scenarios with extremely high feed requirements.

[0023] 3. Enhanced structural rigidity and motion consistency. The outer bushing and inner shaft are wire-cut from the same cylinder, ensuring geometric consistency of the two sets of double V-shaped guide rails and avoiding assembly errors. The two sets of double V-shaped guide rails constrain the relative rotation of the outer bushing and inner shaft, ensuring consistent posture of the diamond pen during dressing, with no deflection error. The close-fitting interference fit further improves the overall rigidity, minimizing deformation under dressing forces. Compared to traditional sliding guide rail structures, this invention significantly improves the rigidity and stability of the system while maintaining high straightness, making it suitable for high-intensity, high-frequency dressing operations.

[0024] 4. The diamond pen clamping mechanism is stable and reliable with high positioning accuracy. The diamond pen cap adopts a "one-point, two-line" clamping structure, applying pressure through a set screw to form a stable triangular contact, ensuring clamping rigidity while preventing pen deformation or displacement. This invention ensures the consistency between the diamond pen and the dresser axis, improving the accuracy of the dressing trajectory. Compared to traditional simple clamping methods, this invention guarantees high rigidity while also providing repeatability, making it suitable for high-precision dressing tasks involving multiple product types and small batches.

[0025] 5. Simple operation, wide applicability, and low maintenance cost. This invention integrates micro-feed and dressing motions into one unit, with a dial for visualizing the process. Operation is intuitive and easy to control, reducing reliance on the machine tool's feed system and lowering operational difficulty and training costs. The structure is highly modular; the two sets of double V-shaped guideways can be manually repaired with an oilstone, making maintenance simple and cost-effective. The overall structure is compact and rigid, adaptable to various grinding machines, expanding application scenarios to achieve fine dressing of the grinding wheel. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the grinding wheel dresser of the present invention.

[0027] Figure 2 This is a schematic diagram of the outer bushing.

[0028] Figure 3 This is a schematic diagram of the inner axis.

[0029] Figure 4 This is a schematic diagram of the structure of the outer bushing and the inner shaft fitting together.

[0030] Figure 5 This is a schematic diagram of the planar structure of the outer bushing and the inner shaft mating.

[0031] Figure 6 This is a schematic diagram showing the positioning of a diamond pen when the inner hole of the pen sleeve has a two-segment arc structure.

[0032] Figure 7 This is a schematic diagram showing the positioning of a diamond pen when the inner hole of the pen sleeve has an arc and a V-groove structure.

[0033] Figure 8 This is a schematic diagram of a diamond pen cap.

[0034] Figure 9 This is a schematic diagram of the transmission assembly.

[0035] Figure 10 This is a schematic diagram of the feed bushing.

[0036] Figure 11 This is a schematic diagram of the feed screw.

[0037] In the diagram: 1-First set screw, 2-Digital dial, 3-Thin-head hex socket screw, 4-Outer bushing, 4-1-Outer bushing threaded hole, 4-2-Outer bushing right-angle V-groove, 4-3-Inner cylindrical surface of outer bushing, 5-Denim bead, 6-Second set screw, 7-Diamond pen, 8-Diamond pen sleeve, 8-1-Diamond pen sleeve sidewall threaded hole, 8-3-Diamond pen sleeve inner hole, 8-3-1-Large eccentric inner cylindrical surface of diamond pen sleeve, 8-3-2-Small eccentric inner cylindrical surface of diamond pen sleeve, 8-4-Diamond pen sleeve End face, 9-inner shaft, 9-1-outer cylindrical surface of inner shaft, 9-2-right angle V-groove of inner shaft, 9-3-cylindrical surface of inner hole of inner shaft, 9-4-stepped end face of inner shaft, 9-5-cylindrical surface of outer hole of inner shaft, 10-feed bushing, 10-1-internal thread of feed bushing, 10-2-outer cylindrical surface of feed bushing, 10-3-inner end face of shoulder of feed bushing, 10-4-cylindrical surface of shoulder of feed bushing, 11-screw baffle, 12-feed screw, 12-1-cylindrical surface of feed screw, 12-3-external thread of feed screw. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] like Figure 1 As shown: This embodiment of a high-precision diamond pen dressing device with micro-feed function includes an outer bushing 4; an inner shaft 9 within the outer bushing 4 maintains high linearity movement via beaded joints 5; one end of the inner shaft 9 is bonded to the diamond pen sleeve 8; a diamond pen 7 for dressing the grinding wheel is locked within the diamond pen sleeve 8 by a second set screw 6; a screw baffle 11 is fixed to one end of the outer bushing 4 by a thin-headed hexagonal socket screw 3; one side of the feed screw 12 is locked within the axis of the dial 2 by a first set screw 1, and the other side is connected to the feed bushing 1. 0. Through the fine thread pair, the two sides of the feed screw 12 are restricted to different areas by the screw baffle 11. During operation, the dial 2 is rotated at a certain angle according to the requirements. The dial 2 drives the feed screw 12 to rotate. The feed screw 12 converts the rotational motion into a small linear motion through the fine thread pair and transmits it to the feed sleeve 10. The feed sleeve 10 drives the inner shaft 9 to make the same small linear motion. The inner shaft 9 then transmits the linear motion to the diamond pen sleeve 8, finally realizing the micro-feed of the diamond pen 7, thereby achieving the purpose of grinding wheel finishing.

[0040] like Figure 1 , Figure 2As shown: The outer bushing 4 threaded hole 4-1 on the outer bushing 4 is only set on one end face of the outer bushing 4, and the screw baffle 11 is fixed to the end face of the outer bushing 4 with the outer bushing threaded hole 4-1 by the thin-headed internal hex screw 3.

[0041] like Figure 1 , Figure 11 As shown: One end face of the screw baffle 11 is fitted to the end face 12-2 of the feed screw shoulder, and the cylindrical surface 12-1 of the feed screw is locked in the center of the dial 2 by the first set screw 1.

[0042] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown: the outer bushing 4 and the inner shaft 9 are formed from a single cylinder by wire cutting, and then by the dense beads 5 to form two sets of double V-shaped dense bead structures; the inner cylindrical surface 4-3 of the outer bushing and the outer cylindrical surface 9-1 of the inner shaft are wire-cut, which can avoid the influence of wire cutting machining errors on the accuracy during assembly; after wire cutting, the inner wall of the outer bushing 4 is provided with two sets of outer bushing right-angle V-shaped grooves, and the outer wall of the inner shaft 9 is provided with two sets of inner shaft right-angle V-shaped grooves; the inner shaft 9 slides in the outer bushing 4 through two sets of double V-shaped guide rails formed by the dense beads 5 and the two outer bushing right-angle V-shaped grooves 4-2 and the two inner shaft right-angle V-shaped grooves 9-2 in pairs; the dense beads 5 are interference fit with the inner shaft 9 and the outer bushing 4, and the interference amount is 2~3μm;

[0043] like Figure 1 , Figure 8 As shown: The end face 8-4 of the diamond pen cap and the inner shaft 9 are glued together with strong adhesive. The outer diameter of the diamond pen cap 8 and the outer diameter of the inner shaft 9 are equal to ensure that the axes of the diamond pen cap 8 and the inner shaft 9 are on the same straight line when glued.

[0044] The inner hole 8-3 of the diamond pen sleeve 8 is an irregular hole, which makes the inner wall of the inner hole 8-3 of the diamond pen sleeve and the outer wall of the diamond pen 7 form two lines of contact; the outer wall of the diamond pen 7 makes point contact with the second set screw 6, thereby forming a one-point two-line fixation of the diamond pen 7.

[0045] like Figure 6 As shown: the inner hole 8-3 of the diamond pen sleeve can be two cylindrical surfaces with different relative radii; the threaded hole 8-1 on the side wall of the diamond pen sleeve is set in the middle of the large-radius cylindrical surface, opposite to the small-radius cylindrical surface; after the second set screw 6 locks the diamond pen 7, the outer wall of the diamond pen 7 forms two line contacts with the small-radius cylindrical surface.

[0046] like Figure 7As shown: The inner hole 8-3 of the diamond pen sleeve can also be a combination structure of a cylindrical surface and a V-shaped groove with a groove at the bottom of the diamond pen sleeve inner hole. The threaded hole 8-1 on the side wall of the diamond pen sleeve is set in the middle of the cylindrical surface. After the second set screw 6 locks the diamond pen 7, the outer wall of the diamond pen 7 and the V-shaped surface of the V-shaped groove of the inner hole of the diamond pen sleeve form two lines of contact.

[0047] The second set screw 6 presses the diamond pen 7 through the threaded hole 8-1 on the side wall of the diamond pen sleeve. The pressing structure is a point-and-two-line pressing, and the triangular structure is stable, ensuring that the axis of the diamond pen 7 is consistent with the axis of the diamond pen grinding wheel dresser, making the structure more stable.

[0048] like Figure 3 , Figure 9 , Figure 10 , Figure 11 As shown: the inner hole of the inner shaft 9 is a stepped hole; the outer cylindrical surface 9-5 of the inner shaft 9 and the cylindrical surface 10-4 of the feed sleeve shoulder of the feed sleeve 10 are interference fit; the stepped hole end face 9-4 of the inner shaft 9 and the inner end face 10-3 of the feed sleeve shoulder of the feed sleeve 10 are in close contact with each other; the inner cylindrical surface 9-3 of the inner shaft and the outer cylindrical surface 10-2 of the feed sleeve of the feed sleeve 10 are clearance fit.

[0049] The feed sleeve 10 and the feed screw 12 are connected and driven by the internal thread 10-1 of the feed sleeve and the external thread 12-3 of the feed screw. Based on the principle that the micrometer can achieve micro-feed by utilizing the transmission characteristics of the precision screw pair, this embodiment uses a fine-tooth tight-fit thread pair to achieve micro-feed and also has a reverse self-locking function.

[0050] The screw baffle 11 is connected to the outer bushing 4 by four thin-headed hexagonal socket screws 3;

[0051] The number of connecting beads 5 between the outer bushing 4 and the inner shaft 9 is for illustrative purposes only and may be increased or decreased according to actual conditions.

[0052] Based on the effect of dressing the grinding wheel, the two sets of double V-shaped guide rails between the outer bushing 4 and the inner shaft 9 are finely finished. The fine finishing method is to use the two right-angled sides of a cuboid oilstone to finely grind the rail surface of each set of double V-shaped guide rails back and forth. Controlling the perpendicularity of the two right-angled sides of the oilstone can ensure the precision of the fine finishing of each set of double V-shaped guide rails.

[0053] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-precision diamond pen grinding wheel dresser with micro-feeding function, characterized in that, It includes: The diamond pen (7) of dressing grinding wheel; The middle of the outer wall of the diamond pen (7) is sleeved with a diamond pen sleeve (8); The end of the outer wall of the diamond pen (7) is sleeved with an inner shaft (9); The side wall of the diamond pen sleeve (8) is provided with a diamond pen sleeve side wall threaded hole (8-1); The second locking screw (6) is arranged in the diamond pen sleeve side wall threaded hole (8-1); The diamond pen sleeve (8) and the diamond pen (7) are connected and fixed through the second locking screw (6); The outer wall of the diamond pen sleeve (8) and the inner shaft (9) is sleeved with an outer shaft sleeve (4); The inner wall of the outer shaft sleeve (4) is provided with two outer shaft sleeve right-angle V-shaped grooves (4-2) with recesses at the bottom in the axial direction; The outer wall of the inner shaft (9) is provided with two inner shaft right-angle V-shaped grooves (9-2) with recesses at the bottom in the axial direction; Two outer shaft sleeve right-angle V-shaped grooves (4-2) and two inner shaft right-angle V-shaped grooves (9-2) are matched to form two groups of double-V-shaped guide rails; A plurality of dense beads (5) are arranged in the two groups of double-V-shaped guide rails to form two groups of double-V-shaped bead structures; The inner end of the inner shaft (9) is sleeved with a feeding shaft sleeve (10); The one end of the feeding shaft sleeve (10) is provided with a feeding shaft sleeve shaft shoulder; The inner part of the feeding shaft sleeve (10) is provided with a feeding shaft sleeve internal thread (10-1); The inner part of the feeding shaft sleeve (10) is sleeved with a feeding screw (12); The one end of the feeding screw (12) is a feeding screw cylindrical surface (12-1), and the other end is a feeding screw external thread (12-3); A feeding screw shaft shoulder is arranged between the feeding screw cylindrical surface (12-1) and the feeding screw external thread (12-3); The one end surface of the feeding screw external thread (12-3) of the feeding screw (12) is provided with a feeding screw hemisphere; The feeding shaft sleeve internal thread (10-1) and the feeding screw external thread (12-3) form a feeding thread pair; The feeding screw cylindrical surface (12-1) is sequentially sleeved with a screw baffle (11) and a dial (2); The screw baffle (11) is threadedly connected and fixed with the one end surface of the outer shaft sleeve (4); The middle part of the dial (2) is provided with a dial shaft shoulder, and the outer end side wall of the dial is provided with a dial side wall threaded hole; The first locking screw (1) is arranged in the dial side wall threaded hole; The dial (2) and the feeding screw (12) sleeved therein are connected and fixed through the first locking screw (1); The diamond pen sleeve inner hole (8-3) of the diamond pen sleeve (8) sleeved with the diamond pen (7) is an irregular hole, so that the inner wall of the diamond pen sleeve inner hole (8-3) and the outer wall of the diamond pen (7) form two line contacts; The outer wall of the diamond pen (7) and the second locking screw (6) point contact, thereby forming one-point two-line fixation of the diamond pen (7).

2. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 1, characterized in that, The diamond pen sleeve inner hole (8-3) is two cylindrical surfaces with different radii; The diamond pen sleeve side wall threaded hole (8-1) is arranged in the middle of the large-radius cylindrical surface and opposite to the small-radius cylindrical surface; After the second locking screw (6) locks the diamond pen (7), the outer wall of the diamond pen (7) and the small-radius cylindrical surface form two line contacts.

3. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 1, characterized in that, The inner hole (8-3) of the diamond pen sleeve is a combination structure of a cylindrical surface and a diamond pen sleeve inner hole V-shaped groove with a recessed bottom, and the side wall threaded hole (8-1) of the diamond pen sleeve is arranged in the middle of the cylindrical surface; after the second locking screw (6) locks the diamond pen (7), the outer wall of the diamond pen (7) and the V-shaped surface of the diamond pen sleeve inner hole V-shaped groove form two line contacts.

4. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 2 or 3, characterized in that, The outer sleeve (4) is a hollow cylindrical structure, the inner shaft (9) is a hollow cylindrical structure, and the two groups of double V-shaped guide rails between the inner wall of the outer sleeve (4) and the outer wall of the inner shaft (9) are in interference fit with the dense beads (5); the dense beads (5) can roll in the two groups of double V-shaped guide rails.

5. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 4, characterized in that, The feed sleeve (10) drives the inner shaft (9) to move axially; the feed sleeve inner thread (10-1) and the feed screw outer thread (12-3) are both fine thread, forming a fine thread pair, and the feed screw (12) can adjust the axial feed amount of the feed sleeve (10) through the fine thread pair.

6. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 5, characterized in that, The diamond pen sleeve (8) is coaxially fixedly connected with the inner shaft (9).

7. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 6, characterized in that, The screw baffle (11) is fixedly connected with one end of the outer sleeve (4) by a thin head inner hexagonal screw (3); when the outer sleeve (4) and the inner shaft (9) move relatively, the dense beads (5) make pure rolling in the two groups of double V-shaped guide rails between the inner wall of the outer sleeve (4) and the outer wall of the inner shaft (9).

8. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 7, characterized in that, The outer sleeve (4) and the inner shaft (9) are formed by wire cutting a cylinder.

9. The high-precision diamond pen grinding wheel dresser with micro-feeding function according to claim 8, characterized in that, The interference amount between the two groups of double V-shaped guide rails between the inner wall of the outer sleeve (4) and the outer wall of the inner shaft (9) and the dense beads (5) is 1-5μm; the outer sleeve right-angle V-shaped groove (4-2) and the inner shaft right-angle V-shaped groove (9-2) are finely ground, and the plane precision is ≤1μm; the fine thread pair of the feed sleeve (10) and the feed screw (12) has a pitch of 0.2-0.5mm; the scale disc (2) is provided with uniformly distributed scales for indicating the feed amount.

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