A drum-shaped helical cylindrical gear processing device

Abstract

The invention discloses a drum-shaped helical cylindrical gear processing device, which comprises a fixed platform, a sliding transmission box which can slide along the length direction of the fixed platform is connected to the fixed platform, a connecting bracket which can be rotatably connected to the sliding transmission box, a cutter disc which can be rotatably connected to the connecting bracket, a plurality of cutter rods are arranged on the cutter rod, a cutting blade is connected to the outer end of the cutter rod, an angle table which can move in the left-right direction and the front-back direction is connected above the fixed platform, at least one adjusting groove for adjusting the inclination angle of the gear blank is opened on the upward end of the angle table, a helical gear adjusting block which can slide just along the curved surface where the upper edge of the adjusting groove is located is connected to the upper side of the angle table, and the gear blank is rotatably connected above the helical gear adjusting block; the invention can realize the processing of the gear tooth profile and the processing of the drum-shaped amount at the same time, and the processing is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of gear processing, in particular to a drum-shaped helical cylindrical gear processing device. Background Art

[0002] Cylindrical gear transmission is the most widely used power transmission mechanism. Helical gears are widely used in high-speed and heavy-load situations due to their smooth transmission, low impact, vibration and noise. However, they have problems such as eccentric load and stress concentration at the root of the gear end face when meshing. When the waist drum-shaped helical gear is meshed, the contact surface is a combination of two curved surfaces, which can effectively reduce the eccentric load and stress concentration at the root of the gear end face caused by processing and installation errors, improve the fatigue strength of the gear, and increase the service life. However, when processing waist drum-shaped helical gears, the worm grinding method is used to process the gears. Its basic principle is similar to gear hobbing. Single-sided processing and two passes are used during processing. First, one tooth surface is processed, and then the other tooth surface is processed. It must be ensured that the width of the grinding wheel at the maximum drum volume of the gear is less than the minimum tooth spacing of the gear. However, tooth grinding and shaping increases the time of gear processing, the cost is high, and the drum volume control is inaccurate. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above and / or existing problems in the existing gear processing, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a drum-shaped helical cylindrical gear processing device, which can realize the processing of the gear tooth profile and the drum-shaped amount at the same time, making the processing more convenient.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a drum-shaped helical cylindrical gear processing device, comprising a fixed platform, a sliding transmission box that can slide along the length direction of the fixed platform is connected to the fixed platform, a connecting bracket is rotatably connected to the sliding transmission box, a cutter disc is rotatably connected to the connecting bracket, a plurality of tool rods are arranged on the cutter disc, and a cutting blade is connected to the outer end of the tool rod, and an angle table that can move in the left and right directions and the front and back directions is connected above the fixed platform, and at least one adjustment groove for adjusting the inclination angle of the gear blank is opened on the upward end of the angle table, and a helical tooth adjustment block that can slide just along the curved surface where the upper edge of the adjustment groove is located is connected to the upper side of the angle table, and the gear blank is rotatably connected above the helical tooth adjustment block.

[0007] In order to further realize the processing of the drum shape, the angle between the plane where the cutter disc is located and the plane perpendicular to the cutter bar on the gear blank is θ, and the central axis of the cutter bar is perpendicular to the X axis of the gear blank. C O C Z C The center of the gear blank is taken as the origin coordinate O C , with O C The horizontal forward direction of the origin is X C Axis positive direction, O C The vertical direction from the origin is Z C Positive axis direction.

[0008] As a further improvement of the present invention, an end of the upper portion of the connecting bracket away from the cutter disc is fixedly connected to a driving motor, an output shaft is connected to the driving motor, and the cutter disc is connected to the output shaft.

[0009] In order to further realize the processing of helical teeth, a position adjustment screw is rotatably connected to the angle table, an adjusting nut is threadedly connected to the position adjustment screw, an adjustment part is fixed to the upper end of the adjusting nut, a sliding groove is opened on the adjustment part, and the lower part of the helical tooth adjustment block is movably connected to the adjustment part through the sliding groove.

[0010] As a further improvement of the present invention, connecting plates on both sides of the adjusting portion are fixed to the lower side of the helical gear adjusting block, and a connecting shaft penetrating the slide slot is rotatably connected to the two connecting plates, and the connecting shaft can move up and down along the slide slot.

[0011] As a further improvement of the present invention, the upward end of the corner platform is provided with two adjustment grooves spaced apart in the left-right direction, and the corner platform between the two adjustment grooves is provided with an upward opening, and the transmission plate is in the opening.

[0012] As a further improvement of the present invention, a sliding groove is provided on the angle platform at the adjustment groove, and the lower end of the bevel tooth adjustment block is provided with a sliding part corresponding to the sliding groove one by one, and the bevel tooth adjustment block is slidably connected to the corresponding sliding groove via the sliding part, and the lower sides of the bevel tooth adjustment blocks at both ends of the sliding part are attached to the angle platform at the upper edge of the adjustment groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0014] Figure 1 The three-dimensional structure of the present invention Figure 1 .

[0015] Figure 2 The three-dimensional structure of the present invention Figure 2 .

[0016] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0017] Figure 4 The three-dimensional structure of the present invention Figure 3 .

[0018] Figure 5 It is a top view of the present invention.

[0019] Figure 6 for Figure 5 The view from the center BB.

[0020] Figure 7 for Figure 6 A partial enlarged view of point D in the middle.

[0021] Figure 8 for Figure 5 View from CC in the middle.

[0022] Fig. 9 for Figure 8 A partial enlarged view of point E in the middle.

[0023] Fig.10 It is a three-dimensional structural diagram of a drum-shaped helical cylindrical gear processed by the present invention.

[0024] Fig.11 This is the structural diagram of a single tooth in a drum helical cylindrical gear.

[0025] Fig.12 This is a schematic diagram of the processing principle of deep cutting processing of the right tooth groove of a micro-drum-shaped helical cylindrical gear in the present invention.

[0026] Fig.13 This is a schematic diagram of the processing principle of deep cutting processing of the left tooth groove of a micro-drum-shaped helical cylindrical gear in the present invention.

[0027] Fig.14 The figure is a schematic diagram of the processing principle of developing and processing the right tooth groove of the micro-drum-shaped helical cylindrical gear in the present invention.

[0028] Fig.15 The figure is a schematic diagram of the processing principle of developing and processing the left tooth groove of the micro-drum-shaped helical cylindrical gear in the present invention.

[0029] Fig.16 The three-dimensional structure of the present invention Figure 5 .

[0030] Fig.17 for Fig.16A partial enlarged view of point F in the middle.

[0031] In the figure, 1 sliding seat, 2 sliding transmission box, 3 first motor, 4 tool rod, 5 cutting blade, 6 tool disc, 7 fixed transmission box, 8 second motor, 9 angle table, 901 limiting slide rail, 10 connecting bracket, 11 gear shaft, 12 gear blank, 13 helical gear adjustment block, 1301 sliding part, 1302 connecting plate, 14 position adjustment screw, 1401 rotating handle, 15 output shaft, 16 connecting shaft, 17 driving motor, 18 adjusting nut, 1801 adjusting part, 19 fixed platform, a sliding groove, b adjusting groove, c slide groove, d limiting slide groove. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1

[0036] Reference Figure 1 to Figure 15 , which is the first embodiment of the present invention, provides a drum-shaped helical cylindrical gear processing device, which can realize the processing of gear tooth profile and drum shape.

[0037] A drum-shaped helical cylindrical gear processing device, which includes a fixed platform 19, a sliding transmission box 2 that can slide along the length direction of the fixed platform 19 is connected to the fixed platform 19, a connecting bracket 10 is rotatably connected to the sliding transmission box 2, a cutter disc 6 is rotatably connected to the connecting bracket 10, a driving motor 17 is fixedly connected to the end of the upper part of the connecting bracket 10 away from the cutter disc 6, an output shaft 15 is connected to the driving motor 17, the cutter disc 6 is connected to the output shaft 15, a plurality of tool rods 4 are arranged on the cutter disc 6, and a cutting blade 5 is connected to the outer end of the tool rod 4, a sliding seat 1 that can slide in the left and right directions is connected to the fixed platform 19, and an angle table 9 that can move in the front and back directions is connected to the sliding seat 1, at least one adjustment groove b for adjusting the inclination angle of a gear blank 12 is opened at the upward end of the angle table 9, a helical gear adjustment block 13 that can just fit on the curved surface where the upper edge of the adjustment groove b is located is connected to the upper side of the angle table 9, and the gear blank 12 is rotatably connected above the helical gear adjustment block 13.

[0038] In this embodiment, a first motor 3 for driving the connecting bracket 10 to rotate is fixedly connected to the upper side of the fixed transmission box 7, a second motor 8 is fixedly connected to the outer side of the sliding transmission box 2, a fixed transmission box 7 is fixed to the upper side of the helical gear adjustment block 13, a vertically arranged gear shaft 11 is rotatably connected to the fixed transmission box 7, a gear blank 12 is connected to the gear shaft 11, a structure is provided in the fixed transmission box 7 for driving the connecting bracket 10 to rotate, a structure is provided in the sliding transmission box 2 for driving the second motor 8 to drive the gear shaft 11 to rotate, the fixed transmission box 7 and the sliding transmission box 2 are both prior arts, and their structures for realizing transmission are not the improvement points of the present invention, and are not described in detail here; the fixed platform 19 is connected to the machine tool, and a structure for driving the sliding transmission box 2 and the sliding seat 1 to move left and right can also be provided on the machine tool, and a structure for driving the angle table 9 to move forward and backward can also be provided on the sliding seat 1, and the structures for realizing the above functions are all conventional arts, and are not described in detail here.

[0039] In order to further realize the processing of the drum shape, the angle between the plane where the cutter head 6 is located and the plane perpendicular to the cutter bar 4 on the gear blank 12 is θ, and the central axis of the cutter bar 4 is perpendicular to the X axis of the gear blank 12. C O C Z C The center of the gear blank 12 is taken as the origin coordinate O C , with O C The horizontal forward direction of the origin is X C Axis positive direction, O C The vertical direction from the origin is Z C Positive axis direction.

[0040] Four tool bars 4 are evenly arranged on a cutter disc 6. During the cutting process, the first three tool bars 4 roughly cut out the tooth shape, and then the fourth tool bar 4 performs precise cutting. Each time a tool bar 4 rotates, the fixed transmission box 7 performs a linear motion along the length direction of the fixed platform 19 to complete the feeding motion. When the right side of the cutter disc 6 is close to the gear blank 12, the cutter disc 6 rotates one circle to complete the cutting depth of the left half of the tooth groove. After the cutting depth of the left half of a tooth groove is completed, the left half of the tooth groove is expanded. During the expansion, the cutter disc 6 performs a rotating motion, and the gear shaft 11 rotates at an angular velocity w c The gear blank 12 is driven to rotate, and the angle table 9 moves forward on the sliding seat 1 to complete the development of the right side of the gear tooth. The relationship between the deep cutting motion of the left half of the tooth groove is as follows: Fig.13 As shown in the figure, the relationship between the developing motion of the left half of the tooth groove is as follows: Fig.15 As shown, when the left side cutting depth and developing process of a gear tooth is completed, the angle table 9 withdraws along the length direction of the fixed platform 19, and the gear shaft 11 drives the gear blank 12 to rotate one tooth thickness, and continues the cutting depth and developing process of the left half of the next tooth groove. When the cutting depth and developing process of the left half of all tooth grooves are completed, the angle table 9 withdraws along the length direction of the fixed platform 19, and the connecting bracket 10 rotates to make the included angle between the cutter head 6 and the cutting plane of the cutting blade 5 be and make the left side of the cutter head 6 close to the gear blank 12. The cutting depth and developing process of the right half of the tooth groove are the same as those of the left half of the tooth groove. The cutting depth processing motion relationship of the right half of the tooth groove is as shown in Fig.12 As shown in the figure, the relationship between the development process of the right half of the tooth groove is as follows: Fig.14 shown.

[0041] In order to further realize the processing of the helical gear, two adjustment grooves b are arranged at intervals in the left and right directions at one end of the angular position platform 9 facing upwards, and an upward opening is provided on the angular position platform 9 between the two adjustment grooves b. The transmission plate is in the opening, and a sliding groove a is provided on the angular position platform 9 at the adjustment groove b. The lower end of the helical gear adjustment block 13 is provided with a sliding portion 1301 corresponding to the sliding groove a one-to-one, and the helical gear adjustment block 13 is slidably connected to the corresponding sliding groove a through the sliding portion 1301. The lower sides of the helical gear adjustment blocks 13 at both ends of the sliding portion 1301 are attached to the angular position platform 9 at the upper edge of the adjustment groove b; the angular position platform 9 is rotatably connected with a position An adjusting screw 14 is provided, and a rotating handle 1401 is fixed to one end of the position adjusting screw 14 extending out of the angular position table 9. An adjusting nut 18 is threadedly connected to the position adjusting screw 14, and an adjusting portion 1801 is fixed to the upper end of the adjusting nut 18. A slide groove c is opened on the adjusting portion 1801, and the lower portion of the helical gear adjusting block 13 is movably connected to the adjusting portion 1801 through the slide groove c. The specific structure is that the lower side of the helical gear adjusting block 13 is fixed with connecting plates 1302 on both sides of the adjusting portion 1801, and the two connecting plates 1302 are rotatably connected with a connecting shaft 16 that passes through the slide groove c, and the connecting shaft 16 can move up and down along the slide groove c.

[0042] Before processing, first adjust the inclination angle of the helical gear adjustment block 13. The adjustment process is to rotate the rotating handle 1401, the position adjusting screw 14 rotates, the position adjusting screw 14 drives the adjusting nut 18 to move, the adjusting nut 18 drives the helical gear adjustment block 13 to move through the adjusting part 1801, the helical gear adjustment block 13 slides along the curved surface where the upper edge of the adjustment groove b is located, and the helical gear adjustment block 13 drives the fixed transmission box 7 to move. When the gear blank 12 moves to the required position, stop rotating the rotating handle 1401 and fix the rotating handle 1401 to realize the inclined installation of the gear blank 12 so as to cut the helix angle.

[0043] Example 2

[0044] Reference Figure 1 , Figure 12 to Figure 15 , which is the second embodiment of the present invention, this embodiment can realize the calculation of the drum shape.

[0045] A drum-shaped helical cylindrical gear processing device, with the gear shaft center as the origin O C , with the origin O C The horizontal forward direction is X C Axis, with origin O C The vertical upward direction is Z C Axis, with origin O C The horizontal direction to the right (away from the cutter head) is Y C When machining drum-shaped helical gears, the cutter head rotates clockwise at a constant speed. At this time, the tool movement trajectory is in X C O C Z C The surface is an ellipse with a major semi-axis a = R and a minor semi-axis b = Rcosθ (where R is the trajectory radius of the cutting blade tip and θ is the distance between the cutter disc plane and X C O C Z C The angle between the two surfaces) is measured by the tool width m and the X C O C Z C By cutting the conical surface formed by the blade trajectory with a plane Σ parallel to the surface, the tooth line at the pitch circle on one side of the gear tooth can be obtained, and then the drum shape of the gear tooth can be obtained.

[0046] Assume that the pressure angle of the gear is 20° and the center of the cutter head is the coordinate origin O D , establish the coordinate system S D (O D X D Y D Z D ), the coordinate system S D Along Z DThe axis is translated in the positive direction by Rtan(θ+20°) to obtain the coordinate system S D '(O D 'X D 'Y D 'Z D '), the conical surface formed by the blade trajectory is in the coordinate system S D The equation in ' can be obtained by Find, for z 2 =tan 2 (70°-θ)(x 2 +y 2 ), (x0, y0, 0) is the circular trajectory formed by the tool tip motion in the coordinate system S D '(O D 'X D 'Y D 'Z D '), z0 is the vertex of the cone formed by the blade trajectory in the coordinate system S D '(O D 'X D 'Y D 'Z D ') D coordinates, t is the parameter, (x, y, z) is the conical surface formed by the blade trajectory in the coordinate system S D '(O D 'X D 'Y D 'Z D The coordinates of any point in the coordinate system S are obtained by translational coordinate transformation. D The equation in is (z-Rtan(70°-θ)) 2 =tan 2 (70°-θ)(x 2 +y 2 ), the plane Σ is in the coordinate system S D The equation in is The tooth line equation is The parametric equation can be written as (tooth width part t>0), (x d ,y d , z d ) is the tooth line in the coordinate system S D (O D X D Y D Z D ) is the coordinate of any point in the gear. The intersection of the tooth line and the gear end face is The equation of the line segment A1A2 is The midpoint of line segment A1A2 is A3(x a ,0,z a), the intersection of the tooth line and the midline of the tooth width is B(x b ,0,z b ), then the drum shape of the gear is

[0047] For example, when the gear module m=3, the tooth width B=30, the trajectory radius of the cutting blade tip R=50cm, the gear helix angle β=10°, and the cutter head inclination angle θ is controlled at 65°~70°, the drum amount is: 0~0.1622mm.

[0048] It can be seen from the above that the amount of drum shape can be accurately controlled when the helical cylindrical gear is processed by the present invention, so that the drum shape can be processed while processing the tooth profile of the helical gear, and the processing is more convenient and efficient.

[0049] Example 3

[0050] Reference Fig.16 and Fig.17 , which is the third embodiment of the present invention, and this embodiment can further limit the movement of the helical gear adjustment block 13 in the height direction.

[0051] A drum-shaped helical cylindrical gear processing device, wherein limit slide grooves d are provided on the left and right sides of a sliding portion 1301, and limit slide rails 901 cooperating with the limit slide grooves d are fixed on the angular platforms 9 on the left and right sides of the sliding groove a. When the sliding portion 1301 of the helical gear adjustment block 13 slides along the sliding groove a, the helical gear adjustment block slides along the limit slide rails 901 through the limit slide grooves d, and the curved surface where the upper side of the angular platform 9 and the curved surface where the lower side of the helical gear adjustment block 13 are coaxial arc concave surfaces; through the structural arrangement of the limit slide grooves d and the limit slide rails 901, the movement of the helical gear adjustment block 13 in the height direction during processing is avoided, thereby improving the reliability of processing.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A drum-shaped helical cylindrical gear processing device, comprising a fixed platform (19), characterized in that: The fixed platform (19) is connected to a sliding transmission box (2) that can slide along the length direction of the fixed platform (19); the sliding transmission box (2) is rotatably connected to a connecting bracket (10); the connecting bracket (10) is rotatably connected to a cutter disc (6); a plurality of cutter bars (4) are arranged on the cutter disc (6); the outer ends of the cutter bars (4) are connected to cutting blades (5); an angle platform (9) that can move in the left-right direction and the front-back direction is connected above the fixed platform (19); the angle platform The upper end of the gear blank (12) is provided with at least one adjusting groove (b) for adjusting the tilt angle of the gear blank (12); the upper side of the angle table (9) is connected with a helical tooth adjusting block (13) which can slide just along the curved surface where the upper edge of the adjusting groove (b) is located; the gear blank (12) is rotatably connected above the helical tooth adjusting block (13); the angle between the plane where the cutter disc (6) is located and the tangent plane on the gear blank (12) which is perpendicular to the cutter bar (4) is θ; the central axis of the cutter bar (4) is perpendicular to the X-axis of the gear blank (12); C O C Z C The center of the gear blank (12) is taken as the origin coordinate O C , with O C The horizontal forward direction of the origin is X C Axis positive direction, O C The vertical direction from the origin is Z C In the positive direction of the axis, θ is not greater than 90°-gear pressure angle, the angle table (9) is rotatably connected with a position adjustment screw (14), the position adjustment screw (14) is threadedly connected with an adjustment nut (18), the upper end of the adjustment nut (18) is fixed with an adjustment portion (1801), the adjustment portion (1801) is provided with a slide groove (c), the lower part of the helical tooth adjustment block (13) is movably connected to the adjustment portion (1801) through the slide groove (c), the lower side of the helical tooth adjustment block (13) is fixed with connecting plates (1302) on both sides of the adjustment portion (1801), the two connecting plates (1302) are rotatably connected with a connecting shaft (16) penetrating the slide groove (c), the connection The shaft (16) can move up and down along the slide groove (c); the upward end of the angle platform (9) is provided with two adjustment grooves (b) arranged at intervals in the left-right direction; the angle platform (9) between the two adjustment grooves (b) has an upward opening; the transmission plate is in the opening; the angle platform (9) at the adjustment groove (b) is provided with a sliding groove (a); the lower end of the helical tooth adjustment block (13) is provided with a sliding portion (1301) corresponding to the sliding groove (a); the helical tooth adjustment block (13) is slidably connected to the corresponding sliding groove (a) via the sliding portion (1301); the lower sides of the helical tooth adjustment blocks (13) at both ends of the sliding portion (1301) are attached to the angle platform (9) at the upper edge of the adjustment groove (b).

2. The drum-shaped helical cylindrical gear processing device according to claim 1, characterized in that: An end of the upper part of the connecting bracket (10) away from the cutter disc (6) is fixedly connected to a driving motor (17), an output shaft (15) is connected to the driving motor (17), and the cutter disc (6) is connected to the output shaft (15).

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