A deep groove bottom drilling positioning device

Abstract

The deep groove bottom drilling positioning device described in the present invention belongs to the technical field of steam turbine generator processing, and includes a bracket, a locking assembly and a drill sleeve; the bracket includes a U-shaped structure composed of a crossbeam and vertical beams vertically arranged at both ends of the crossbeam; the locking assembly is arranged in the vertical beam; a drill hole is arranged in the middle of the crossbeam, and the drill sleeve is installed on the crossbeam and corresponds to the drill hole. By placing the bracket in the rotor wire embedding groove and fixing the position of the bracket in the rotor wire embedding groove through the locking assembly, a stable support is provided for guiding the drill bit; the U-shaped bracket and the drill sleeve installed in the middle thereof can correspond to the target position that needs to be drilled in the middle of the rotor wire embedding groove; the drill sleeve guides the drill bit to avoid the problem of poor rigidity due to the long suspension of the drill bit, and can improve the processing accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of steam turbine generator processing, in particular to a deep groove bottom drilling positioning device. Background Art

[0002] When drilling the middle part of the bottom surface of the rotor wire embedding groove, due to the deep groove bottom, there are problems such as difficult observation of the drilling, difficult positioning, difficult to ensure accuracy, and the drill bit is suspended for a long time and has poor rigidity. Especially for important workpieces with high drilling accuracy requirements and more holes at the bottom of the groove, drilling is very difficult, the scrap rate is high, the processing time is long, and the utilization rate of processing equipment is low, which increases the manufacturing cost and has a great impact on production. Summary of the invention

[0003] In order to solve the problems that the rotor wire embedding groove is deep, which leads to difficulty in drilling positioning, difficulty in ensuring accuracy, and poor rigidity due to the drill bit being suspended for a long time, the present invention provides a deep groove bottom drilling positioning device.

[0004] The present invention is achieved through the following technical solutions:

[0005] A deep groove bottom drilling positioning device comprises a bracket, a locking assembly and a drill sleeve;

[0006] The bracket comprises a U-shaped structure consisting of a crossbeam and vertical beams vertically arranged at both ends of the crossbeam;

[0007] The locking assembly is arranged in the vertical beam;

[0008] A drill hole is provided in the middle of the crossbeam, and the drill sleeve is installed on the crossbeam and corresponds to the drill hole.

[0009] By placing the bracket in the rotor wire embedding groove and fixing the position of the bracket in the rotor wire embedding groove through a locking assembly, stable support is provided for guiding the drill bit; the U-shaped bracket and the drill sleeve installed in the middle thereof can correspond to the target position where a hole needs to be drilled in the middle of the rotor wire embedding groove; the drill sleeve guides the drill bit, thereby avoiding the problem of poor rigidity caused by the drill bit being suspended for a long time and improving the processing accuracy.

[0010] A further improvement of the present invention is that the locking assembly comprises a first through hole, an expansion chamber, a first expansion slot and a push rod;

[0011] The first through hole is adapted to the top rod and is vertically arranged on the vertical beam, and an expansion portion is provided at the bottom end of the first through hole, and the expansion portion is a tapered groove structure that is tightened downward;

[0012] The expansion chamber is opened at the inner lower part of the vertical beam and passes through the lower section of the first through hole. The first expansion groove is opened at the bottom of the bracket and communicates with the expansion chamber.

[0013] The push rod passes through the expanded portion and the first expansion groove through the first through hole. Under the cooperation of the expansion chamber and the first expansion groove, the bracket parts on both sides of the expansion chamber are squeezed outward by the push rod, thereby forming an extrusion on the inner wall of the rotor wire embedding groove, reversely fixing the position of the bracket in the rotor wire embedding groove.

[0014] A further improvement of the present invention is that a second expansion slot connected to the expansion chamber and the first expansion slot is vertically provided on the lower side wall of the vertical beam. The vertically provided second expansion slot increases the expansion limit of the brackets on both sides of the expansion chamber and improves the firmness of the brackets in the rotor wire embedding slot.

[0015] A further improvement of the present invention is that a third expansion slot is vertically provided at one end of the horizontal beam near the vertical beam, penetrating the horizontal beam and communicating with the expansion chamber and the first expansion slot. The third expansion slot increases the expansion limit of the brackets on both sides of the expansion chamber, thereby improving the firmness of the brackets in the rotor wire embedding slot.

[0016] A further improvement of the present invention is that an expansion angle compensation portion is provided at one end of the third expansion slot away from the expansion chamber connected thereto, and the compensation portion can assist in raising the upper limit of the expansion of the third expansion slot to open the stent along the expansion chamber.

[0017] A further improvement of the present invention is that the expansion angle compensation part is a columnar through-hole structure that vertically penetrates the cross beam and is connected to the third expansion slot. The columnar through-hole structure increases the limit of the outward expansion of the third expansion slot and, because the compensation part is close to the drill sleeve, prevents the bracket from expanding outward along the third expansion slot and affecting the installation of the drill sleeve on the bracket.

[0018] A further improvement of the present invention is that a fastening bolt is provided at the top of the mandrel, and a thread matching the fastening bolt is provided at the upper part of the first through hole; the diameter of the nut of the fastening bolt is more than three times the diameter of the screw, and the outer edge of the nut does not exceed the vertical side of the vertical beam. By screwing the fastening bolt in, the mandrel is pushed and squeezed downward; the diameter of the nut is greater than three times the diameter of the screw, which increases the contact surface for the fastening bolt operation and makes it easy to form a positioning and compacting operation with the help of external force.

[0019] A further improvement of the present invention is that a limit mechanism is provided between the fastening bolt and the ejector rod to prevent sliding. In order to prevent the ejector rod from tilting due to non-centering when the fastening bolt is screwed in, causing uneven expansion of the two sides of the U-shaped block slot and affecting the clamping accuracy, the ejector rod and the fastening bolt are linked by the limit mechanism to improve the efficiency of the bottom end of the ejector rod passing through the expanded portion.

[0020] A further improvement of the present invention is that the top surface of the crossbeam is provided with an embedding groove corresponding to the drill hole and cooperating with the drill sleeve to be installed on the crossbeam. The embedding groove provides a fixed and accurate installation position for the drill sleeve, thereby improving the assembly speed.

[0021] It can be seen from the above technical scheme that the beneficial effects of the present invention are: by placing the bracket in the rotor wire embedding groove and fixing the position of the bracket in the rotor wire embedding groove through the locking assembly, stable support is provided for guiding the drill bit; the U-shaped bracket and the drill sleeve installed in the middle thereof can correspond to the target position where a hole needs to be drilled in the middle of the rotor wire embedding groove; the drill sleeve guides the drill bit, thereby avoiding the problem of poor rigidity caused by the drill bit being suspended for a long time, and can improve the processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0024] Figure 2 It is a top view schematic diagram of a specific embodiment of the present invention.

[0025] Figure 3 It is a schematic side view of a specific embodiment of the present invention.

[0026] Figure 4 It is a schematic cross-sectional structure diagram of a specific implementation mode of the present invention.

[0027] Figure 5 It is a schematic cross-sectional view of a push rod in a first through hole according to a specific embodiment of the present invention.

[0028] In the accompanying drawings: 1. bracket, 2. locking assembly, 21. push rod, 22. fastening bolt, 23. first through hole, 24. expansion part, 25. expansion chamber, 26. first expansion groove, 27. second expansion groove, 28. third expansion groove, 281. compensation part, 3. drill sleeve, 31. second through hole, 4. embedding groove, 41. fastening screw hole, 42. fastening screw, 43. positioning pin, 5. limiting mechanism. DETAILED DESCRIPTION

[0029] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0030] As shown in the accompanying drawings, a deep groove bottom drilling positioning device includes a bracket 1, a locking assembly 2 and a drill sleeve 3; by placing the bracket 1 in the rotor wire embedding groove and fixing the position of the bracket 1 in the rotor wire embedding groove through the locking assembly 2, stable support is provided for guiding the drill bit.

[0031] The bracket 1 comprises a U-shaped structure consisting of a crossbeam and vertical beams vertically arranged at both ends of the crossbeam.

[0032] The locking assembly 2 is arranged in the vertical beam;

[0033] The locking assembly 2 includes a first through hole 23, an expansion chamber 25, a first expansion slot 26 and a push rod 21;

[0034] The first through hole 23 is adapted to the top rod 21 and is vertically arranged on the vertical beam. The bottom end of the first through hole 23 is provided with an expansion portion 24, and the expansion portion 24 is a tapered groove structure that is tightened downwards.

[0035] The expansion chamber 25 is opened at the inner lower part of the vertical beam and passes through the lower section of the first through hole 23 . The first expansion slot 26 is opened at the bottom of the bracket 1 and communicates with the expansion chamber 25 .

[0036] The push rod 21 passes through the expanded portion 24 and the first expansion groove 26 through the first through hole 23. With the cooperation of the expansion chamber 25 and the first expansion groove 26, parts of the bracket 1 on both sides of the expansion chamber 25 are squeezed outward by the push rod 21, thereby squeezing the inner wall of the rotor wire embedding groove and reversely fixing the position of the bracket 1 in the rotor wire embedding groove.

[0037] The top of the mandrel 21 is provided with a fastening bolt 22, and the upper part of the first through hole 23 is provided with a thread matched with the fastening bolt 22; the nut diameter of the fastening bolt 22 is more than three times the diameter of the screw, and the outer edge of the nut does not exceed the vertical side of the vertical beam. By screwing in the fastening bolt 22, the mandrel 21 is pushed and squeezed downward; the diameter of the nut is greater than three times the diameter of the screw, which increases the contact surface for the fastening bolt 22 and makes it easy to form a positioning and compacting operation with the help of external force.

[0038] A limit mechanism 5 is provided between the fastening bolt 22 and the push rod 21 to prevent sliding. In order to prevent the push rod 21 from tilting due to non-centering when the fastening bolt 22 is screwed in, causing uneven expansion of the two sides of the U-shaped block slot and affecting the clamping accuracy, the push rod 21 is linked with the fastening bolt 22 through the limit mechanism 5 to improve the efficiency of the bottom end of the push rod 21 passing through the expanded portion 24.

[0039] The limiting mechanism 5 includes a matching limiting block and a limiting groove; the limiting block is arranged on the bottom surface of the screw or the top surface of the push rod 21, and the limiting groove is arranged on the top surface of the push rod 21 or the bottom surface of the screw. By matching the limiting block with the limiting groove, the push rod 21 can be driven to rotate together when the fastening bolt 22 is rotated, so as to reduce the resistance of the push rod 21 passing through the expansion portion 24.

[0040] The lower side wall of the vertical beam is vertically provided with a second expansion slot 27 connected to the expansion chamber 25 and the first expansion slot 26. The vertically provided second expansion slot 27 increases the expansion limit of the bracket 1 on both sides of the expansion chamber 25, and improves the firmness of the bracket 1 in the rotor wire embedding groove.

[0041] The end of the cross beam near the vertical beam is vertically provided with a third expansion slot 28 penetrating the cross beam and communicating with the expansion chamber 25 and the first expansion slot 26. The third expansion slot 28 increases the expansion limit of the bracket 1 on both sides of the expansion chamber 25, and improves the firmness of the bracket 1 in the rotor wire embedding groove.

[0042] The third expansion slot 28 is provided with an expansion angle compensation portion 281 at one end thereof away from the expansion chamber 25 . The compensation portion 281 can assist in lifting the third expansion slot 28 to open the upper limit of the expansion of the stent 1 along the expansion chamber 25 .

[0043] The second expansion groove 27 is provided on the opposite side of the two vertical beams, and the expansion chamber 25, the first expansion groove 26, the second expansion groove 27 and the third expansion groove 28 are provided on the bisecting line that bisects the horizontal beam and the vertical beam. Under the action of the top rod 21, the brackets 1 on both sides of the expansion chamber 25 are evenly moved to both sides, so that the two parts are pressed and contacted with the inner wall of the rotor wire embedding groove at the same time.

[0044] The expansion angle compensation portion 281 is a columnar through-hole structure that vertically penetrates the cross beam and communicates with the third expansion slot 28. The columnar through-hole structure increases the limit of the outward expansion of the third expansion slot 28. Since the compensation portion 281 is close to the drill sleeve 3, the outward expansion of the bracket 1 along the third expansion slot 28 is prevented from affecting the installation of the drill sleeve 3 on the bracket 1.

[0045] A drilling hole is provided in the middle of the crossbeam, and the drill sleeve 3 is installed on the crossbeam and corresponds to the drilling hole. The U-shaped bracket 1 and the drill sleeve 3 installed in the middle thereof can correspond to the target position where a hole needs to be drilled in the middle of the rotor wire embedding groove; the drill sleeve 3 guides the drill bit, thereby avoiding the problem of poor rigidity caused by the drill bit being suspended for a long time, and can improve the processing accuracy.

[0046] The top surface of the crossbeam is provided with an embedding groove 4 corresponding to the drill hole and cooperating with the drill sleeve 3 to be installed on the crossbeam. The embedding groove 4 provides a fixed and accurate installation position for the drill sleeve 3, thereby improving the assembly speed.

[0047] At least two positioning pins 43 are provided on the bottom surface of the embedding groove 4, and the drill sleeve 3 is provided with a second through hole 31 that matches the positioning pins 43. The positioning pins 43 match the second through hole 31 to achieve rapid alignment and installation of the drill sleeve 3 in the embedding groove 4.

[0048] At least two fastening screw holes 41 are provided on the embedding groove 4 and the drill sleeve 3. Fastening screws 42 are provided through the two corresponding fastening screw holes 41. The fastening screws 42 cooperate with the fastening screw holes 41 to form a fastened installation after the drill sleeve 3 is placed in the embedding groove 4.

[0049] To sum up, the working principle of the device is as follows: first, the drill sleeve 3 is fixedly installed on the embedding groove 4 of the bracket 1. Then, the bracket 1 is placed in the rotor embedding groove, the push rod 21 is placed in the first through hole 23, and the fastening bolt 22 is operated to press the push rod 21 downward. When the push rod 21 passes through the conical expansion portion 24 bisected by the expansion chamber 25, the bracket 1 on both sides of the expansion chamber 25 moves outward and is pressed into contact with the inner wall of the rotor embedding groove 4, thereby forming the fixation of the bracket 1 in the rotor embedding groove. After use, the fastening bolt 22 is rotated in the opposite direction. After the push rod 21 loses the downward pressure, the bracket 1 parts on both sides of the expansion chamber 25 squeeze the push rod 21, so that the push rod 21 is squeezed upward out of the first through hole 23; finally, the bracket 1 can be taken out of the rotor embedding groove.

[0050] The deep groove bottom drilling positioning device described in the present invention provides stable support for guiding the drill bit by placing a bracket in the rotor wire embedding groove and fixing the position of the bracket in the rotor wire embedding groove through a locking assembly; the U-shaped bracket and the drill sleeve installed in the middle thereof can correspond to the target position where a hole needs to be drilled in the middle of the rotor wire embedding groove; the drill sleeve guides the drill bit, thereby avoiding the problem of poor rigidity caused by the drill bit being suspended for a long time and improving the processing accuracy.

[0051] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0052] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A deep groove bottom drilling positioning device, characterized in that: The invention comprises a bracket (1), a locking assembly (2) and a drill sleeve (3); the bracket (1) comprises a U-shaped structure consisting of a crossbeam and vertical beams vertically arranged at both ends of the crossbeam; the locking assembly (2) is arranged in the vertical beam; a drill hole is arranged in the middle of the crossbeam, and the drill sleeve (3) is installed on the crossbeam and corresponds to the drill hole; the locking assembly (2) comprises a first through hole (23), an expansion chamber (25), a first expansion groove (26) and a push rod (21); the first through hole (23) is adapted to the push rod (21) and is vertically arranged on the vertical beam, and an expansion portion (24) is provided at the bottom end of the first through hole (23), and the expansion portion (24) is a tapered groove structure that is tightened downward; the expansion chamber (25) is opened at the inner lower part of the vertical beam and passes through the lower section of the first through hole (23), and the first expansion groove (26) is opened at the bottom of the bracket (1) and is connected to the expansion chamber (25); the lower section of the vertical beam A second expansion groove (27) is vertically provided on the side wall and is connected to the expansion chamber (25) and the first expansion groove (26); the push rod (21) passes through the expansion portion (24) and the first expansion groove (26) through the first through hole (23); under the cooperation of the expansion chamber (25) and the first expansion groove (26), the brackets (1) on both sides of the expansion chamber (25) are partially squeezed outward by the push rod (21), thereby squeezing the inner wall of the rotor wire embedding groove and reversely fixing the position of the bracket (1) in the rotor wire embedding groove; a third expansion groove (28) is vertically provided at one end of the cross beam close to the vertical beam, which penetrates the cross beam and is connected to the expansion chamber (25) and the first expansion groove (26); an expansion angle compensation portion (281) is provided at one end of the third expansion groove (28) away from the expansion chamber (25) connected thereto; the expansion angle compensation portion (281) is a columnar through hole structure that vertically penetrates the cross beam and is connected to the third expansion groove (28).

2. A deep groove bottom drilling positioning device according to claim 1, characterized in that: A fastening bolt (22) is provided at the top end of the top rod (21), and a thread matching the fastening bolt (22) is provided at the upper portion of the first through hole (23); the diameter of the nut of the fastening bolt (22) is more than three times the diameter of the screw rod, and the outer edge of the nut does not exceed the vertical side of the vertical beam.

3. A deep groove bottom drilling positioning device according to claim 2, characterized in that: A limiting mechanism (5) for preventing sliding is provided between the fastening bolt (22) and the push rod (21).

4. A deep groove bottom drilling positioning device according to claim 1, characterized in that: The top surface of the crossbeam is provided with an embedding groove (4) corresponding to the drill hole and cooperating with the drill sleeve (3) to be installed on the crossbeam.

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