Bearing bush drilling correction device and drilling method

Abstract

The present invention discloses a bearing bush drilling correction device and a drilling method, comprising a bracket 1, a bracket 2 and a bottom plate which are relatively placed, the bottom plate is provided with a slot body, the slot body is slidably connected with a slide plate, the slide plate can move left and right, the slide plate is abutted with a spring, the right side of the slide plate abuts against the inner wall of the slot body, a dividing plate and a mold body are fixedly installed on the upper end of the slide plate, a fixed plate is installed on the upper end of the dividing plate, a countersunk hole is provided at the bottom of the mold body, an extension platform is provided on the outer side of the fixed plate, the extension platform is inserted into the mold body, the mold body is also provided with a mold cavity, the bearing bush body can be placed in the mold cavity, a bracket 3 is installed on the upper end of the bracket 1, the bracket 3 is connected with a slide bar, the slide bar is installed with a fixed block, and the fixed block can be moved above the bearing bush body. The present invention provides a bearing bush drilling correction device and a drilling method, which improve the drilling accuracy and increase the service life of the shaft and the bearing bush.

Description

Technical Field

[0001] The invention relates to the technical field of bearing bush processing equipment, and in particular to a bearing bush drilling correction device and a drilling method. Background Art

[0002] At present, larger linear bearings are usually equipped with bushings. The bushings are arc-shaped block structures, and the radial inner side of the bushings is coated with alloy coatings. After the spindle and bushings are assembled, the spindle and the alloy coatings are slidably connected. After the spindle is started, the bushings and the spindles heat up rapidly, and the bushings form extremely high temperatures near the alloy coatings. Therefore, cooling holes are added near the alloy coatings of the bushings and coolant is introduced to cool them down. On the premise of ensuring sufficient strength, the smaller the distance between the cooling holes and the alloy coatings, the better the cooling effect. Due to the large size of the bushings and the deep drilling depth, the cooling holes are crooked. When the cooling holes are crooked to the side of the alloy coating, the distance between the cooling holes and the alloy coatings will be too small, affecting the strength and service life of the bushings. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a bearing bush drilling correction device and a drilling method to improve the drilling accuracy and increase the service life of the shaft and the bearing bush.

[0004] The invention discloses a bearing bush drilling correction device, comprising a bracket one, a bracket two and a bottom plate which are placed relatively, wherein one end of the bottom plate is hinged to the bracket one, and the bottom surface of the other end of the bottom plate can abut against the bracket two, the bottom plate is provided with a slot body, the slot body is slidably connected with a slide plate, the slide plate can move left and right, a spring abuts against the left side of the slide plate, and the right side of the slide plate abuts against the inner wall of the slot body, a dividing plate and a mold body are fixedly installed on the upper end of the slide plate, a fixed plate is installed on the upper end of the dividing plate, a countersunk hole is provided at the bottom of the mold body, the fixed plate is located in the countersunk hole, an extension platform is provided radially outside the fixed plate, and the extension platform is inserted into the The mold body is inserted into the fixed disk, and the fixed disk can drive the mold body to rotate synchronously when it rotates; the mold body is also provided with a mold cavity, which is connected from top to bottom, and the bearing body can be placed in the mold cavity; the upper end of the bracket one is installed with a bracket three, and the upper end of the bracket three is slidably connected with a slide bar, the slide bar can move left and right, and the slide bar is installed with a fixed block, and the fixed block can move to the top of the bearing body; an extension plate is installed on the right side of the skateboard, and the extension plate extends out of the right end of the skateboard, and the bottom plate is installed with a sensor, and the sensor is located on the right side of the slot body. When the skateboard is at the right extreme position, the sensor can sense the extension plate.

[0005] Furthermore, a plurality of extension platforms are provided along the circumference of the fixed disk, and the mold body is provided with grooves corresponding to the extension platforms.

[0006] Furthermore, the width of the trough body matches the width of the slide plate, and the length of the trough body is greater than the length of the slide plate.

[0007] Furthermore, it also includes an initial state, in which the upper end surface of the slide plate is horizontally arranged and the bearing shell body is vertically arranged.

[0008] Furthermore, it also includes a drilling position, wherein one radial line L of the fixed plate passes through the center of the drilling position, and the direction of the radial line L is arranged along the left-right moving direction of the slide plate.

[0009] Furthermore, the bearing shell body is also provided with a coating, and the coating is located radially inward of the bearing shell body.

[0010] Furthermore, the bracket 2 is installed with an oil cylinder 1, and the output end of the oil cylinder 1 abuts against the bottom of the right side of the base plate.

[0011] The present invention also discloses a bearing bush drilling method, using a bearing bush drilling correction device, comprising the following steps:

[0012] S1 Pre-punched

[0013] The bearing body is inserted into the mold cavity, and a hole is machined with a drill. In this step, the hole forming size is smaller than the final forming size;

[0014] S2 hole correction

[0015] ① The skateboard is at the right extreme position, and the sensor senses the extension board;

[0016] ② Move the slide bar to the right so that the fixed block is located above the hole;

[0017] ③Insert the rod into the fixed block, insert the rod downward into the hole, and the left end of the rod is close to the left wall of the hole when inserting. When the hole is tilted toward the coating side, the rod will push the hole wall during the insertion process and move the bearing body, mold body, and slide plate to the left together, so that the extension plate can move out of the sensing range of the sensor;

[0018] S3 channel forming

[0019] When the extension plate moves out of the sensing range of the sensor, the bottom plate flips counterclockwise along the hinge point, the bearing body flips synchronously, and the bearing body tilts to the right from top to bottom, and the drill drills from top to bottom to form a hole of the final size;

[0020] When the extension plate does not move out of the sensing range of the sensor, the drill bit directly drills from top to bottom to form a hole of the final size.

[0021] Beneficial effects of the present invention:

[0022] Pre-drilling forms a smaller correction hole. By detecting the inclination of the correction hole, the hole that is tilted more toward the alloy coating side is corrected. The correction is made by flipping the bearing body at a smaller angle so that the hole is corrected and drilled away from the alloy coating during drilling to prevent the distance between the hole and the alloy coating from being too small and affecting the bearing strength, thereby greatly improving the hole position accuracy. In addition, the hole position can be set closer to the alloy coating, thereby improving the cooling effect on the alloy coating during cooling, and then increasing the service life of the shaft and bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of an embodiment;

[0024] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3 for Figure 1 Sectional view along the MM direction;

[0026] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0027] Figure 5 for Figure 1 Sectional view along the NN axis;

[0028] Figure 6 It is a cross-sectional view of the bottom plate in the embodiment when it is tilted.

[0029] Figure numerals: bracket 1, step surface 11, wall surface 12, shaft body 13, bracket 2, step surface 21, cylinder 1 22, bottom plate 3, channel 1 31, trough body 32, spring 33, slide plate 34, roller 341, channel 2 342, extension plate 343, sensor 35, dividing plate 36, fixed plate 361, extension platform 3611, fixed seat 4, mold body 5, countersunk hole 51, mold cavity 52, bearing body 6, hole 61, coating 62, drilling position 63, insert rod 64, cylinder 2 7, pressure block 71, bracket 3 8, cylinder 81, slide rod 82, fixed block 83. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] like Figure 1As shown, a bearing bushing drilling correction device includes a bracket 1, a bracket 2, and a base plate 3 which are placed opposite to each other on the left and right sides. The bracket 1 is provided with a step surface 11, and the bracket 22 is provided with a step surface 21. The left end of the base plate 3 is located above the step surface 11, and the bottom surface of the right end of the base plate 3 abuts against the step surface 21. When the right end of the base plate 3 abuts against the step surface 21, the base plate 3 is in a horizontal state.

[0032] like Figure 5 As shown, the bracket 1 is provided with walls 12 on both sides, and a shaft 13 is installed between the two walls 12. Both ends of the shaft 13 are inserted into the wall 12 with interference fit, and the shaft 13 passes through the bottom plate 3 with clearance fit, and the bottom plate 3 can rotate along the axis of the shaft 13.

[0033] like Figure 1 As shown, the bracket 2 is installed with a cylinder 1 22, and the top of the output end of the cylinder 1 22 abuts against the bottom of the right side of the bottom plate 3. When the output end of the cylinder 1 22 is pushed upward, the bottom plate 3 is pushed to rotate counterclockwise.

[0034] like Figure 1 As shown, the bottom plate 3 is provided with a slot body 32, and the slot body 32 is slidably connected with a slide plate 34, and the slide plate 34 can move left and right, wherein the width dimension of the slot body 32 matches the width dimension of the slide plate 34, and the length dimension of the slot body 32 is greater than the length of the slide plate 34. A spring 33 is abutted on the left side of the slide plate 34, and the left end of the spring 33 abuts and is fixed to the left inner wall of the slot body 32. In a free state, the right end of the slide plate 34 abuts against the right inner wall of the slot body 32 under the action of the spring 33, that is, the slide plate 34 is in the right extreme position. A plurality of rollers 341 are installed at the bottom of the slide plate 34, and the rollers 341 abut against the bottom surface of the slot body 32 and can roll along the bottom surface of the slot body 32 to reduce the resistance of the slide plate 34 to move left and right.

[0035] like Figure 1 As shown, the base plate 3 is installed with a sensor 35, and the sensor 35 is located on the right side of the slot body 32. An extension plate 343 is installed on the right end of the slide plate 34, and the extension plate 343 extends to the right from the right end of the slide plate 34. When the slide plate 34 is at the right extreme position, the extension plate 343 extends to the top of the sensor 35 and can be sensed by the sensor 35.

[0036] like Figure 1 As shown, the upper end of the slide plate 34 is fixedly mounted with a dividing plate 36 and a mold body 5. The dividing plate 36 is controlled to rotate at an angle by a servo system. The upper end of the dividing plate 36 is a rotating output end and is fixedly mounted with a fixed plate 361. The fixed plate 361 is coaxial with the mold body 5 and is a disc structure. A countersunk hole 51 is provided at the bottom of the mold body 5, and the fixed plate 361 is located in the countersunk hole 51. Figure 3An extension platform 3611 is provided on the radial outer side of the fixed disk 361. Four extension platforms 3611 are provided along the circumference of the fixed disk 361. The mold body 5 is provided with a groove corresponding to the extension platform 3611. The extension platform 3611 is inserted into the groove of the mold body 5. When the fixed disk 361 rotates, it can drive the mold body 5 to rotate synchronously.

[0037] like Figure 1 As shown, the mold body 5 is also provided with a mold cavity 52, which passes through the mold body 5 from top to bottom. The mold cavity 52 is located near the outer periphery of the mold body 5, and the bearing body 6 can be placed in the mold cavity 52. Figure 3 The bearing body 6 is an arc-shaped block structure, and a coating 62 is provided on the radial inner side of the bearing body 6. The coating 62 is an alloy coating with high hardness. Figure 1 , Figure 2 As shown, the bearing body 6 is provided with a hole 61, which is through from top to bottom. The hole 61 is a cooling hole. Cooling liquid is passed into the hole 61 to reduce the temperature of the bearing body 6 during operation. Figure 4 There are three holes 61 and they are all located near the coating 62. The centers of the three holes 61 are located on the same circumference with the center of the mold body 5 as the center. The cross-sectional dimensions of the mold cavity 52 match the cross-sectional dimensions of the bearing body 6. Figure 1 As shown, after the bearing body 6 is inserted into the mold cavity 52, its upper end is exposed from the mold cavity 52 to facilitate material removal. When the hole 61 is processed, the drill bit drills downward from the upper end of the bearing body 6. The bottom of the bearing body 6 abuts against the upper end surface of the slide plate 34. The slide plate 34 is provided with a second channel 342, and the second channel 342 passes through the slide plate 34 from top to bottom. The bottom plate 3 is provided with a first channel 31, and the first channel 31 passes through the bottom plate 3 from top to bottom. The upper end of the first channel 31 is connected with the second channel 342, and the upper end of the second channel 342 is located below the hole 61. The first channel 31 and the second channel 342 form a discharge channel for waste chips to be discharged, thereby improving the drilling accuracy.

[0038] like Figure 1 As shown, the upper end of the bracket 1 is equipped with a bracket 3 8, and the upper end of the bracket 3 8 is slidably connected with a slide bar 82. The bracket 3 8 is also equipped with a cylinder 81, and the cylinder 81 can drive the slide bar 82 to move left and right. The slide bar 82 is equipped with a fixed block 83, and the fixed block 83 can move to the top of the channel 61. The fixed block 83 is slidably connected with an insertion rod 64, and the insertion rod 64 can move up and down along the inner wall of the fixed block 83 and can be inserted into the channel 61. Figure 2 , and when inserted, the left end of the insertion rod 64 can abut against the left end of the channel 61, and the outer diameter of the insertion rod 64 is smaller than the aperture of the channel 61.

[0039] like Figure 1As shown, the outer wall of the mold body 5 is slidably connected with a fixed seat 4, which is an annular structure and is inserted into the mold body 5. The mold body 5 can rotate along the inner wall of the fixed seat 4 along its own axis, and the fixed seat 4 is fixedly connected to the slide plate 34. The bracket 1 is equipped with a cylinder 2 7, and the output end of the cylinder 2 7 is connected to a pressure block 71. The pressure block 71 can abut the left end of the fixed seat 4 so that the right end of the slide plate 34 can support the right wall of the groove body 32 to improve the stability of the entire device during punching. An elastic pad is installed at the right end of the pressure block 71, and the pressure block 71 can also compact the fixed seat 4 after it flips at a small angle.

[0040] like Figure 1 As shown, in the initial state, the bottom plate 3 is in a horizontal state, at which time the upper end surface of the slide plate 34 is also arranged horizontally, and the bearing body 6 and the hole 61 are both arranged vertically.

[0041] like Figure 4 As shown, a drilling position 63 is provided on a path on one of the radial lines L of the fixed disk 361 . The drilling position 63 is a fixed hole drilling processing position. The drill bit drills a hole at the drilling position 63 to form a channel 61 .

[0042] Combination Figure 1 The radial line L moves left and right along the slide plate 34. When a hole 61 is drilled at a drilling position 63, the dividing plate 36 drives the fixed plate 361 to rotate so that the drilling point of another hole 61 of the bearing body 6 moves to the drilling position 63 for the next drilling operation.

[0043] A method for drilling a bearing bush, using the above-mentioned bearing bush drilling correction device, the specific method is as follows:

[0044] S1 Pre-punched

[0045] like Figure 1 As shown, the output end of the oil cylinder 1 22 is retracted, the right bottom surface of the bottom plate 3 abuts against the step surface 21, the bottom plate 3 is in a horizontal state, and the upper end surface of the slide plate 34 is horizontally arranged. The pressing block 71 is pushed out to the right to make the right side of the slide plate 34 press against the right wall surface of the groove body 32.

[0046] The bearing body 6 is inserted into the mold cavity 52 and combined with Figure 4 A hole 61 is punched at the punching position 63, and the dividing plate 36 is rotated so that the mold body 5 drives the bearing body 6 to rotate a certain angle and punch another hole 61. The third hole 61 is also performed in the same manner.

[0047] The aperture of the hole 61 formed after pre-punching is smaller than the aperture of the final formed hole 61 to avoid the hole 61 being directly formed so as to avoid the hole 61 being deflected toward the coating 62 , which would reduce the strength of the bearing body 6 .

[0048] S2 hole correction

[0049] ① The output end of the oil cylinder 2 7 retracts to the left, the pressure block 71 is separated from the fixing seat 4, the slide plate 34 is at the right end limit position under the action of the spring 33, and the sensor 35 senses the extension plate 343.

[0050] ② If Figure 1 , Figure 2 As shown, the cylinder 81 drives the slide bar 82 to move to the right, so that the fixing block 83 is located above the hole 61.

[0051] ③ Such as Figure 2 As shown, the rod 64 is inserted into the fixing block 83, and the rod 64 is inserted downward into the channel 61, and the left end of the rod 64 is close to the left wall of the channel 61. When the channel 61 is tilted toward the coating 62, the left wall of the channel 61 tilts from top to bottom to the right, and the Figure 1 As the insertion rod 64 moves up and down, the insertion rod 64 will push the wall of the hole 61 during the insertion process of the hole 61 and move the bearing body 6, the mold body 5, and the slide plate 34 to the left together. When the inclination of the hole 61 is large, the movement distance of the slide plate 34 increases, causing the extension plate 343 to move out of the range of the sensor 35. At this time, the system obtains a signal showing that the hole 61 is skewed to a large extent toward the coating 62 side, and the hole 61 needs to be corrected. When the inclination of the hole 61 is small, the extension plate 343 cannot move out of the range of the sensor 35, and the hole position of the hole 61 does not need to be corrected.

[0052] The insertion rod 64 is taken out, and the slide plate 34 is at the right end limit position under the action of the spring 33, and the next hole 61 is detected by rotating the indexing plate 36. After completion, the slide bar 82 retracts to the left.

[0053] S3 channel forming

[0054] The holes 61 that do not need correction are punched a second time to form the final size.

[0055] For the hole 61 that needs to be corrected, Figure 6 As shown, the output end of the oil cylinder 22 extends to drive the bottom plate 3 to turn counterclockwise by a certain angle, so that the bearing body 6 turns by the same angle, and the angle value is controlled at 0.3 degrees to 0.6 degrees. The pressing block 71 is pushed out to the right to make the right side of the slide plate 34 press against the right side wall of the groove body 32. Figure 6 The hole is drilled in the direction of the arrow until the channel 61 is formed to the final size. During this process, since the bearing body 6 gradually tilts to the right from top to bottom, when the drill bit drills from top to bottom, the bottom of the drill bit gradually moves away from the coating 62 to achieve the hole position correction effect.

[0056] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A bearing bush drilling correction device, characterized in that: The invention comprises a bracket one (1), a bracket two (2), and a bottom plate (3) which are placed opposite to each other. One end of the bottom plate (3) is hinged to the bracket one (1), and the bottom surface of the other end of the bottom plate (3) can abut against the bracket two (2). The bottom plate (3) is provided with a groove body (32). The groove body (32) is slidably connected with a slide plate (34). The slide plate (34) can move left and right. The left side of the slide plate (34) abuts against a spring (33), and the right side of the slide plate (34) abuts against the inner wall of the groove body (32). A dividing plate (36) and a mold body (5) are fixedly mounted on the upper end of the slide plate (34); a fixed plate (361) is mounted on the upper end of the dividing plate (36); a countersunk hole (51) is provided at the bottom of the mold body (5); the fixed plate (361) is located in the countersunk hole (51); an extension platform (3611) is provided radially outside the fixed plate (361); the extension platform (3611) is inserted into the mold body (5); when the fixed plate (361) rotates, it can drive the mold body (5) to rotate synchronously; The mold body (5) is also provided with a mold cavity (52), the mold cavity (52) is connected from top to bottom, and the bearing shell body (6) can be placed in the mold cavity (52); the upper end of the bracket one (1) is installed with a bracket three (8), and the upper end of the bracket three (8) is slidably connected with a slide rod (82), and the slide rod (82) can move left and right. The slide rod (82) is installed with a fixed block (83), and the fixed block (83) can move to the top of the bearing shell body (6); An extension plate (343) is installed on the right side of the slide plate (34), and the extension plate (343) extends out of the right end of the slide plate (34). A sensor (35) is installed on the bottom plate (3), and the sensor (35) is located on the right side of the slot body (32). When the slide plate (34) is located at the right extreme position, the sensor (35) can sense the extension plate (343); The bearing shell body (6) is further provided with a coating (62), and the coating (62) is located radially inward of the bearing shell body (6); The bearing shell body (6) is provided with a hole (61), and the hole (61) is located on a side close to the coating (62); The fixing block (83) is slidably connected to an insertion rod (64), and the insertion rod (64) can move up and down along the inner wall of the fixing block (83) and can be inserted into the hole (61).

2. A bearing bushing drilling correction device according to claim 1, characterized in that: The extension platforms (3611) are provided in plurality along the circumference of the fixed disk (361), and the mold body (5) is provided with grooves corresponding to the extension platforms (3611).

3. A bearing bushing drilling correction device according to claim 1, characterized in that: The width of the trough body (32) matches the width of the slide plate (34), and the length of the trough body (32) is greater than the length of the slide plate (34).

4. A bearing bushing drilling correction device according to claim 1, characterized in that: It also includes an initial state, in which the upper end surface of the slide plate (34) is arranged horizontally and the bearing shell body (6) is arranged vertically.

5. A bearing bush drilling correction device according to claim 1, characterized in that: It also includes a drilling position (63), wherein a radial line L of the fixed disk (361) passes through the center of the drilling position (63), and the direction of the radial line L is arranged along the left-right moving direction of the slide plate (34).

6. A bearing bush drilling correction device according to claim 1, characterized in that: The bracket 2 (2) is installed with a cylinder 1 (22), and the output end of the cylinder 1 (22) is in contact with the bottom of the right side of the base plate (3).

7. A method for drilling a bearing bush, using a bearing bush drilling correction device according to any one of claims 1 to 6, characterized in that: The steps include: S1 Pre-punched The bearing shell body (6) is inserted into the mold cavity (52), and the hole (61) is machined with a drill. In this step, the molding size of the hole (61) is smaller than the final molding size; S2 hole correction ① The slide plate (34) is at the right extreme position, and the sensor (35) senses the extension plate (343); ② The sliding rod (82) moves to the right side so that the fixing block (83) is located above the hole (61); ③ The insertion rod (64) is inserted into the fixing block (83), and the insertion rod (64) is inserted downward into the hole (61), and the left end of the insertion rod (64) is closely attached to the left wall of the hole (61) when the hole (61) is inserted. When the hole (61) is tilted toward the coating (62), the insertion rod (64) pushes the wall of the hole (61) during the insertion process of the hole (61) and causes the bearing body (6), the mold body (5), and the slide plate (34) to move to the left together, so that the extension plate (343) can be moved out of the sensing range of the sensor (35); ④ Taking out the insertion rod (64); S3 channel forming When the extension plate (343) moves out of the sensing range of the sensor (35), the bottom plate (3) turns counterclockwise along the hinge point, the bearing body (6) turns synchronously, and the bearing body (6) tilts from top to bottom to the right, and the drill drills from top to bottom to form the hole (61) of the final size; When the extension plate (343) does not move out of the sensing range of the sensor (35), the drill bit directly drills from top to bottom to form the channel (61) of the final size.

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