Reinforcing tool for deep hole drilling process

Abstract

The utility model discloses a reinforcing tool for a deep hole drilling process, which comprises a drill bushing seat and a radial positioning bracket used for supporting a long shaft part of a crankshaft, a drill bushing is arranged in the drill bushing seat, the radial positioning bracket is arranged in front of the drill bushing seat, a clamping plate is arranged between the drill bushing seat and the radial positioning bracket, and the drill bushing seat is fixedly connected with the radial positioning bracket. The clamping plate is provided with a rotation limiting clamping groove used for placing a long shaft eccentric part of the crankshaft from top to bottom in a matched mode; the pressing block is pressed on the long shaft part, and the air cylinder drives the pressing block to move up and down. The reinforcing tool disclosed by the utility model is beneficial to improving the yield and the production efficiency.

Description

Technical Field

[0001] The utility model relates to the field of drilling machine tooling, in particular to a reinforcement tooling for a deep hole drilling process. Background Art

[0002] Currently, a compressor crankshaft needs to be machined with deep holes, such as Figure 5 As shown, the crankshaft 99 is formed with a long axis portion 991 and a short axis portion 992. The long axis portion 991 and the short axis portion 992 are coaxially arranged. A short axis eccentric portion 993 and a long axis eccentric portion 994 are formed between the long axis portion 991 and the short axis portion 992. The short axis eccentric portion 993 is relatively close to the short axis portion 992, and the long axis eccentric portion 994 is relatively close to the long axis portion 991. At present, a horizontal drilling machine is used to process a deep hole in the center of the end face of the short axis part 992. The long axis part 991 is placed on a semicircular bracket of the tooling so that the long axis part 991 is radially positioned, and a pressure block is pressed on the long axis part 991 to prevent the crankshaft 99 from bouncing and loosening. When the twist drill of the horizontal drilling machine drills the crankshaft 99, the twist drill will apply torque to the crankshaft 99 due to the rotation of the twist drill. The above torque overcomes the friction force of the pressure block on the long axis part 991, which will cause the crankshaft 99 to rotate. This not only leads to a decrease in drilling efficiency, but also the rotation of the crankshaft 99 is accompanied by pauses and sudden turns, resulting in relatively unstable rotation of the twist drill, which leads to the deep hole accuracy (including inner diameter and coaxiality) not meeting the standards, seriously affecting the yield rate, and also causing the twist drill to break easily, seriously affecting production efficiency. Therefore, it is necessary to improve the existing tooling. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a reinforcement tool for a deep hole drilling process, which is beneficial to improving the yield rate.

[0004] The purpose of this utility model is achieved through the following technical solutions.

[0005] The reinforcement tooling for the deep hole drilling process disclosed in the utility model includes a drill sleeve seat and a radial positioning bracket for supporting the long axis portion of the crankshaft, wherein a drill sleeve is provided in the drill sleeve seat, and the radial positioning bracket is provided in front of the drill sleeve seat, wherein a clamping plate is provided between the drill sleeve seat and the radial positioning bracket, and the clamping plate is formed with a rotation-limiting clamping groove for the eccentric portion of the long axis of the crankshaft to be adapted and placed from top to bottom; and further includes a cylinder and a pressure block for pressing on the long axis portion, and the cylinder drives the pressure block to move up and down.

[0006] Preferably, the rotation limiting slot is arranged to the left of the drill sleeve.

[0007] Preferably, a notch chamfer is formed on the upper end of the rotation limiting slot.

[0008] Preferably, the clamping plate is fixed against the rear side of the corresponding radial positioning bracket.

[0009] Preferably, the cylinder is configured as a rotary cylinder, the cylinder is provided with a piston rod, the piston rod is relatively fixedly connected to a horizontal rotary arm, and the pressure block is arranged on the lower side of the horizontal rotary arm.

[0010] Preferably, the radial positioning brackets are distributed front and back, and the pressing block has a working position and an avoidance position relative to the radial positioning brackets. In the working position, the pressing block is located between two corresponding radial positioning brackets.

[0011] Compared with the prior art, the present invention has the following beneficial effects: by arranging a clamping plate between the drill sleeve seat and the radial positioning bracket, the clamping plate is formed with a rotation-limiting groove for the eccentric part of the long shaft of the crankshaft to be adapted and placed from top to bottom, which can prevent the crankshaft from rotating with the drill bit, thereby facilitating improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic top view of the structure of the combination of the reinforcement tooling and the drilling machine head of the present invention.

[0013] Figure 2 This is a front view structural diagram of the combination of the clamping plate and the eccentric portion of the long shaft of the present invention.

[0014] Figure 3 This is a front view structural diagram of the drill sleeve seat of the present invention.

[0015] Figure 4 This is a front view structural diagram of the radial positioning bracket, cylinder and pressure block combination of the present invention.

[0016] Figure 5 Schematic diagram of the crankshaft structure from a top view.

[0017] Explanation of reference numerals: base 1; radial positioning bracket 2; drill sleeve seat 3; drill sleeve 31; clamping plate 4; rotation limiting slot 41; slot chamfer 410; slot side wall 411; slot bottom wall 412; mounting hole 42; cylinder 5; piston rod 51; horizontal rotary arm 61; pressure rod 62; pressure block 63; crankshaft 99; major axis portion 991; minor axis portion 992; minor axis eccentric portion 993; major axis eccentric portion 994; drill bit 98. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] The reinforcement tooling of the deep hole drilling process of the utility model is as follows: Figure 1As shown, it includes a drill sleeve seat 3 and a radial positioning bracket 2 for supporting the long axis portion 991 of the crankshaft 99. The radial positioning bracket 2 is formed with a semicircular groove, which is adapted to the long axis portion 991, so that the radial positioning bracket 2 has a positioning effect on the long axis portion 991 in the radial direction of the long axis portion 991. Figure 3 As shown, a drill sleeve 31 is provided in the drill sleeve seat 3. Figure 1 As shown, the radial positioning bracket 2 is arranged in front of the drill sleeve seat 3, and a clamping plate 4 is provided between the drill sleeve seat 3 and the radial positioning bracket 2. Figure 2 As shown, the card plate 4 is formed with a rotation-limiting card slot 41 for the long-axis eccentric portion 994 of the crankshaft 99 to fit in from top to bottom. In other words, the slot of the rotation-limiting card slot 41 is opened upward, and the width of the rotation-limiting card slot 41 in the left-right direction is adapted to the outer diameter of the long-axis eccentric portion 994. In other words, the width of the rotation-limiting card slot 41 is slightly larger than the outer diameter of the long-axis eccentric portion 994. For example, the width of the rotation-limiting card slot 41 is about 1 mm larger than the outer diameter of the long-axis eccentric portion 994. Figure 1 and Figure 4 As shown, the reinforcement tooling for the deep hole drilling process of the present invention also includes a cylinder 5 and a pressure block 63 for pressing on the long shaft portion 991. The cylinder 5 drives the pressure block 63 to move up and down, and the pressure block 63, in combination with the radial positioning bracket 2, firmly positions the long shaft portion 991 in the radial direction. The radial positioning bracket 2 and the drill sleeve holder 3 are mounted on the base 1.

[0020] The working principle of the utility model is briefly described below: Figure 1 As shown, the crankshaft 99 is first placed from top to bottom on the radial positioning bracket 2, specifically, the long axis portion 991 is adapted to be connected with the radial positioning bracket 2. At this time, the rear end surface of the short axis portion 992 is in contact with the front end surface of the drill sleeve 31, and the front end surface of the long axis eccentric portion 994 is in contact with the rear side of the corresponding radial positioning bracket 2, thereby positioning the crankshaft 99 in the front-to-back direction, and, as shown in FIG. Figure 2 As shown, the long shaft eccentric portion 994 has been placed in the rotation limiting slot 41. At this time, the axis of the long shaft portion 991 is in a horizontal state. Then the cylinder 5 drives the pressure block 63 to move downward, so that the pressure block 63 presses on the corresponding long shaft portion 991, thereby preventing the crankshaft 99 from bouncing upward. Figure 1 As shown, the drill bit 98 is set on the head of the drilling machine. The drill bit 98 is coaxial with the short shaft portion 992. The drill bit 98 moves forward and passes through the drill sleeve 31. Then, the drill bit 98 drills the center of the rear end surface of the short shaft portion 992. Figure 2In the visual direction, the drill bit 98 rotates counterclockwise, and the drill bit 98 applies a counterclockwise torque to the short shaft portion 992. The short shaft portion 992 is driven by the drill bit 98 to rotate counterclockwise. However, since the long shaft eccentric portion 994 is eccentric to the short shaft portion 992, when the long shaft eccentric portion 994 rotates around the axis of the short shaft portion 992, because the width of the rotation-limiting groove 41 is adapted to the outer diameter of the long shaft eccentric portion 994, the rotation of the long shaft eccentric portion 994 will be immediately blocked by the inner wall of the rotation-limiting groove 41, thereby preventing the crankshaft 99 from rotating with the drill bit 98. The tooling of the present invention strengthens the stable positioning effect of the crankshaft 99, which is conducive to the stable rotation of the drill bit 98 relative to the crankshaft 99, thereby improving the yield rate and improving production efficiency. After the drill bit 98 completes drilling, the drill bit 98 moves away from the crankshaft 99, and the cylinder 5 drives the pressure block 63 to move up and away from the crankshaft 99, and the worker can remove the crankshaft 99.

[0021] Furthermore, if Figure 2 As shown, the rotation limiting slot 41 is arranged to the left of the drill sleeve 31. Since the drill sleeve 31 and the drill bit 98 are coaxial, in other words, during the processing, the drill sleeve 31 and the long axis portion 991 are coaxial. Therefore, when the long axis eccentric portion 994 is placed in the rotation limiting slot 41, the center of the long axis eccentric portion 994 is located to the left of the center of the long axis portion 991. The long axis eccentric portion 994 is slightly pushed down to swing the long axis eccentric portion 994 downward around the axis of the long axis portion 991, so that the long axis eccentric portion 994 is close to the bottom wall 412 of the rotation limiting slot 41. When the drill bit 98 drills the crankshaft 99, the long axis portion 991 tends to rotate counterclockwise, but the long axis eccentric portion 994 is immediately blocked by the bottom wall 412, so that the circumferential positioning effect of the rotation limiting slot 41 on the crankshaft 99 is more reliable and effective, and the operation of pushing down the long axis eccentric portion 994 is relatively simple and direct. Assuming that the rotation limiting slot 41 is aligned with the drill sleeve 31, when the long-axis eccentric portion 994 is placed in the rotation limiting slot 41, the axis of the long-axis eccentric portion 994 can be located above or below the axis of the long-axis portion 991. When the long-axis eccentric portion 994 rotates counterclockwise around the axis of the long-axis portion 991, the long-axis eccentric portion 994 will be immediately blocked by the groove sidewall 411 of the rotation limiting slot 41. If the rotation limiting slot 41 is offset to the right of the drill sleeve 31, when the long-axis eccentric portion 994 rotates counterclockwise around the axis of the long-axis portion 991, the long-axis eccentric portion 994 will swing upward slightly and then be blocked by the groove sidewall 411 on the left side of the rotation limiting slot 41.

[0022] Furthermore, if Figure 2As shown, a slot chamfer 410 is formed at the upper end of the rotation limiting slot 41. In other words, the upper end of the slot side wall 411 is connected to the corresponding slot chamfer 410. Therefore, when the long axis eccentric portion 994 is placed in the rotation limiting slot 41, the slot chamfer 410 can guide the long axis eccentric portion 994 to move downward, thereby avoiding the long axis eccentric portion 994 from getting stuck when being placed in the rotation limiting slot 41.

[0023] Furthermore, if Figure 1 As shown, the card plate 4 is fixed against the rear side of the corresponding radial positioning bracket 2. Specifically, as shown in FIG. Figure 2 As shown, a mounting hole 42 is formed on the clamping plate 4. The clamping plate 4 can be reliably fixed by passing a screw through the mounting hole 42 and screwing it to the radial positioning bracket 2. Moreover, the above-mentioned mounting structure is simple, which is conducive to convenient tooling modification.

[0024] Furthermore, if Figure 4 As shown, the cylinder 5 is configured as an angle cylinder. The angle cylinder belongs to the prior art. For reference, the Chinese utility model patent publication number CN201250818Y "A kind of angle cylinder" and the Chinese utility model patent publication number CN204771643U "A kind of angle cylinder lever lifting and clamping mechanism" can be referred. The cylinder body of the cylinder 5 is mounted on the base 1. Figure 4 As shown, the cylinder 5 is provided with a piston rod 51, which is relatively fixedly connected to a horizontal rotary arm 61 (the horizontal rotary arm 61 can be an accessory of the angle cylinder). Specifically, a flat head is formed on the upper end of the piston rod 51, which is plugged into the middle of the horizontal rotary arm 61. A pressure block 63 is provided on the lower side of the horizontal rotary arm 61. Specifically, pressure rods 62 are respectively installed on both ends of the horizontal rotary arm 61 by screws. The pressure rod 62 is perpendicular to the horizontal rotary arm 61. Pressure blocks 63 are respectively provided on the lower sides of both ends of the pressure rod 62. The pressure blocks 63 can be made of nylon and can be installed on the lower side of the pressure rod 62 by corresponding screws. Figure 1 As shown, when the pressure block 63 is working, the pressure blocks 63 at both ends of the pressure rod 62 are pressed on the same long axis portion 991. When the processing is completed, the piston rod 51 of the cylinder 5 drives the pressure rod 62 to move up and rotate 90°, so that the pressure rod 62 is transferred to the outside of the long axis portion 991. During this period, the horizontal swing arm 61 is kept horizontal. After that, the worker's hand or the robot arm can move down to pick up the crankshaft 99, and then the crankshaft 99 can be moved vertically upward to leave the tooling of the utility model, thereby preventing the crankshaft 99 from hitting the pressure block 63.

[0025] Furthermore, if Figure 1As shown, the radial positioning brackets 2 are arranged front and back, and the pressure block 63 has a working position and an avoidance position relative to the radial positioning brackets 2. In the working position, the pressure block 63 is located between the two corresponding radial positioning brackets 2. The provision of the two front and rear radial positioning brackets 2 to support the long axis portion 991 is conducive to the stable placement of the crankshaft 99. Since the contact point between the pressure block 63 and the long axis portion 991 is located between the fulcrums of the two radial positioning brackets 2 on the long axis portion 991, the pressure block 63 effectively prevents the front end of the long axis portion 991 from bouncing upward or the rear end of the long axis portion 991 from bouncing upward. The cylinder 5 drives the pressure block 63 to switch between the working position and the avoidance position. When the pressure block 63 is in the working position, the pressure block 63 is located directly above the axis of the drill sleeve 31. When the pressure block 63 is in the avoidance position, the pressure block 63 is located outside the axis of the drill sleeve 31 in the left and right directions.

Claims

1. A reinforcement tool for a deep hole drilling process, comprising a drill sleeve seat (3) and a radial positioning bracket (2) for supporting a long axis portion (991) of a crankshaft (99), wherein a drill sleeve (31) is provided in the drill sleeve seat (3), and the radial positioning bracket (2) is provided in front of the drill sleeve seat (3), characterized in that: A clamping plate (4) is provided between the drill sleeve seat (3) and the radial positioning bracket (2), wherein the clamping plate (4) is formed with a rotation-limiting clamping groove (41) for the long shaft eccentric portion (994) of the crankshaft (99) to be adapted to be placed therein from top to bottom; and further comprising a cylinder (5) and a pressing block (63) for pressing on the long shaft portion (991), wherein the cylinder (5) drives the pressing block (63) to move up and down.

2. The reinforcement tool for deep hole drilling process according to claim 1, characterized in that: The rotation limiting slot (41) is arranged to the left of the drill sleeve (31).

3. The reinforcement tool for deep hole drilling process according to claim 2, characterized in that: A notch chamfer (410) is formed at the upper end of the rotation-limiting slot (41).

4. The reinforcement tool for deep hole drilling process according to claim 1, characterized in that: The clamping plate (4) is fixed against the rear side of the corresponding radial positioning bracket (2).

5. The reinforcement tool for deep hole drilling process according to claim 1, characterized in that: The cylinder (5) is configured as an angle cylinder. The cylinder (5) is provided with a piston rod (51). The piston rod (51) is relatively fixedly connected to a horizontal rotary arm (61). The pressure block (63) is provided on the lower side of the horizontal rotary arm (61).

6. The reinforcement tool for deep hole drilling process according to claim 5, characterized in that: The radial positioning brackets (2) are arranged in a front-to-back distribution, and the pressing block (63) has a working position and an avoidance position relative to the radial positioning brackets (2). In the working position, the pressing block (63) is located between the corresponding two radial positioning brackets (2).

Images