CN111203566B - Machine part spiral perforating device - Google Patents

Abstract

The invention provides a spiral drilling device for mechanical parts, which effectively solves the problem that in the prior art, it is difficult to punch spirally distributed holes on shaft parts, and the shaft parts need to be continuously positioned, and the accuracy is poor; The technical solution is that it includes a frame, there are clamps on the left and right side plates of the frame, the clamps can drive the workpiece to rotate, a flat plate is arranged on the lower side of the workpiece, and a U-shaped plate is arranged on the upper end of the flat plate, and each U-shaped plate is on the side close to the workpiece. There is a rotating shaft, a first friction wheel is fixed on the rotating shaft, a second friction wheel is arranged on one side of the first friction wheel, and the first friction wheel can drive the second friction wheel to rotate; there is a screw rod on the frame, and a hollow tube is sleeved on the screw rod. There is a third friction wheel on the tube, and there is a small friction wheel between the second friction wheel and the third friction wheel. The rotation of the third friction wheel can drive the hollow tube to rotate, so that the hollow tube drives the U-shaped plate to move left and right along the screw; the upper side of the workpiece There is a horizontal support plate, and a drilling rig that can move up and down is installed on the support plate.

Description

A screw punching device for mechanical parts

technical field

The invention relates to the technical field of mechanical processing, in particular to a screw drilling device for mechanical parts.

Background technique

At present, spiral blades are widely used in human production and life, such as material conveying, compression, mixing, and also such as harvesters in agricultural production, crushing mechanisms of crushers and so on.

In the existing technology, in most cases, high precision is not required when installing and fixing the screw blades, and most of them adopt two forms of welding and screw fixing. Both methods have their own advantages and disadvantages: welding is convenient and fast, and no pre-drilling is required. , but the accuracy is random and the accuracy cannot be guaranteed. Welding easily deforms the spiral blade, which leads to stress concentration. Once damaged, the intermediate spindle and the spiral blade need to be scrapped together, which wastes a lot of resources; screw fixing needs to be pre-tightened. However, most of the drilling machines are still traditional drilling rigs. Therefore, during repeated drilling and repeated positioning, it is impossible to ensure that multiple holes are on the same helix line, resulting in an unbalanced lead of the helical blade, which affects the later stage of the product. Installation, it is easy to cause deformation of the spiral blade.

At present, in the process of drilling along the spiral line, it is usually pre-positioned, the position of each hole is marked, and then the conventional drilling and drilling method is used to realize the spiral drilling, but this method is inefficient, the accuracy cannot be guaranteed, and During drilling, the shaft parts need to be positioned continuously, and due to human influence, the drill bit is prone to skew and even damage to the drill bit; for the installation and drilling of helical blades with different leads, it is necessary to recalculate and determine the drilling position. Not only the efficiency is low and the precision is poor, but also the positioning and fixing needs to be repeated, the operation is cumbersome and extremely inconvenient.

To sum up, in the prior art, when drilling holes on shaft parts to be installed with spiral blades, the positioning accuracy of the holes is poor, the drilling efficiency is low, the process is cumbersome, the drill bit is easily damaged, and the operation is inconvenient.

SUMMARY OF THE INVENTION

In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a screw drilling device for mechanical parts, which effectively solves the problem that in the prior art, it is difficult to punch spirally distributed holes on shaft parts, and the shaft parts need to be drilled. Constant positioning, the problem of poor accuracy.

The technical solution of the solution is to include a frame, and there are clamps for clamping shaft workpieces on the left and right side plates of the frame. The clamps can drive the workpiece to rotate, and the lower side of the workpiece has a horizontal flat plate that can move left and right. A U-shaped plate with an upward opening. The two U-shaped plates are symmetrical in front and back. The two U-shaped plates can move toward each other or back. Each U-shaped plate has a rotating shaft parallel to the workpiece on the side close to the workpiece. On the U-shaped plate, the rotating shaft is fixed with a first friction wheel coaxial with it. The workpiece can drive the first friction wheel to rotate. There is a conical second friction wheel on one side of the first friction wheel, and the central axis of the second friction wheel rotates. It is fixed on the U-shaped plate, and the first friction wheel can drive the second friction wheel to rotate; there are screws corresponding to the U-shaped plate one-to-one on the frame. A conical third friction wheel is fixed on it, and there is a small friction wheel between the second friction wheel and the third friction wheel. The second friction wheel drives the third friction wheel to rotate through the small friction wheel, and the rotation of the third friction wheel can drive the hollow tube. Rotation so that the hollow tube drives the U-shaped plate to move left and right along the screw; there is a horizontal support plate on the upper side of the workpiece, and a drilling rig capable of moving up and down is installed on the support plate.

The invention has an ingenious structure, can realize punching along the spiral line on the shaft parts, does not need pre-measurement and positioning, can ensure the punching accuracy, and is convenient to operate.

Description of drawings

FIG. 1 is a front sectional view of the present invention.

FIG. 2 is a front view of some core components in FIG. 1 .

Figure 3 is a side sectional view of the present invention.

FIG. 4 is a schematic diagram of a workpiece being clamped by a fixture in the present invention.

FIG. 5 is a top sectional view of the present invention.

FIG. 6 is a schematic diagram of the mechanism of the U-shaped plate and its upper parts in the present invention.

FIG. 7 is a partial enlarged view of part A in FIG. 5 .

Detailed ways

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

1 to 7, the present invention includes a frame 1, the left and right side plates of the frame 1 are provided with clamps for clamping shaft workpieces, the clamps can drive the workpiece to rotate, and the lower side of the workpiece has horizontal and can move left and right. The flat plate 2, the upper end of the flat plate 2 has two U-shaped plates 3 with upward openings, the two U-shaped plates 3 are symmetrical in front and back, the two U-shaped plates 3 can move toward each other or back, and each U-shaped plate 3 is on the side close to the workpiece There is a rotating shaft 4 parallel to the workpiece, the rotating shaft 4 is rotatably fixed on the U-shaped plate 3, the rotating shaft 4 is fixed with a first friction wheel 5 coaxial with it, the workpiece can drive the first friction wheel 5 to rotate, the first friction wheel 5 There is a conical second friction wheel 6 on one side, the central axis of the second friction wheel 6 is rotatably fixed on the U-shaped plate 3, and the first friction wheel 5 can drive the second friction wheel 6 to rotate; The screws 7 corresponding to the shaped plates 3 one-to-one. The screw 7 is sheathed with a hollow tube 8 that can drive the U-shaped plate 3 to move left and right. The hollow tube 8 is fixed with a conical third friction wheel 9. The second friction wheel 6 and the There is a small friction wheel between the three friction wheels 9. The second friction wheel 6 drives the third friction wheel 9 to rotate through the small friction wheel. The rotation of the third friction wheel 9 can drive the hollow tube 8 to rotate, so that the hollow tube 8 drives the U-shaped plate 3. Move left and right along the screw 7; there is a horizontal support plate 10 on the upper side of the workpiece, and a drilling rig 11 that can move up and down is installed on the support plate 10.

In order to change the transmission ratio between the second friction wheel 6 and the third friction wheel 9, so as to realize drilling along the helical lines of different leads, the small friction wheel can be used between the second friction wheel 6 and the third friction wheel 9. The friction wheel 9 moves back and forth in the interval, and the small friction wheel is always in contact with the second friction wheel 6 and the third friction wheel 9. The diameter of the left end of the second friction wheel 6 is larger than the diameter of the right end, and the diameter of the right end of the third friction wheel 9 Larger than the diameter of the left end, a stud 12 parallel to the axis of the small friction wheel is rotatably fixed on the U-shaped plate 3, a nut 13 is sleeved on the stud 12, and a vertical connecting plate 14 is fixed on the lower side of the nut 13, and the small friction wheel is hinged on the At the lower end of the connecting plate 14, the rotation of the stud 12 drives the nut 13 to reciprocate along the connecting plate 14, so that the connecting plate 14 below it drives the small friction wheel to move back and forth.

In order to install the hollow tube 8, the two ends of the hollow tube 8 pass through the corresponding side plate of the U-shaped plate 3 and are placed outside the U-shaped plate 3. The end of the hollow tube 8 has protrusions, and the hollow tube 8 and the U-shaped plate 3 Bearings are installed in between.

In order to realize the left and right movement of the flat plate 2 and reduce the frictional force, a plurality of horizontal guide rods 17 are fixed at the lower end of the frame 1. A linear bearing is installed between the guide rod 17 and the sliding cylinder 18 and the flat plate 2 are fixed together.

In order to realize that the first friction wheel 5 drives the second friction wheel 6 to rotate, the end of the rotating shaft 4 is fixed with a first gear 15 coaxial with it, and the two ends of the second friction wheel 6 are fixed with a coaxial with the first gear 15 15 corresponds to the second gear 16 one-to-one, and the first gear 15 meshes with the second gear 16 .

In order to prevent interference, the diameter of the first friction wheel 5 is larger than that of the first gear 15 .

In order to realize that the two U-shaped plates 3 can move toward each other or back in the front-rear direction, a groove is formed on the upper end surface of the flat plate 2 along the front-rear direction, and the first stud bolt 19 that can be rotated is installed in the groove. A stud bolt 19 has sliding blocks 20 at both ends. The first stud bolt 19 and the sliding block 20 are connected by threads. The upper end of the sliding block 20 and the corresponding U-shaped plate 3 are fixed together. The U-shaped plates 3 move toward each other or backward in the front-rear direction.

In order to clamp the workpiece, the fixture includes a first cylinder 21 horizontally penetrating the side plate of the frame 1, the first cylinder 21 and the side plate of the frame 1 are rotatably fixed, and one end of the cylinder close to the center of the frame 1 is fixed with a The cylindrical shell 22 coaxial with it, the workpiece horizontally penetrates the shell 22, the shell 22 has a first bevel gear 23 coaxial with the workpiece, and the side plate of the shell 22 has a plurality of circumferentially evenly distributed and aligned with the first bevel gear 23. The second bevel gear 24 meshes with the bevel gear 23. The second bevel gear 24 can drive the first bevel gear 23 to rotate. There is a movable claw 25 in the groove that can slide along it. The end face of the first bevel gear 23 close to the center of the frame 1 and the claw 25 are engaged by plane threads. The rotation of the first bevel gear 23 can drive the claw 25 to the shell at the same time. The centers of the bodies 22 are brought closer together until the workpiece is fixed.

In order to prevent the clamping claw 25 from loosening during the rotation of the workpiece, the side of the first bevel gear 23 away from the center of the frame 1 is fixed with a second cylinder 26 coaxial with it. The central shaft of the bevel gear 24 is rotatably fixed on the side plate of the casing 22, the other end of the central shaft penetrates the side plate of the casing 22 and is placed on the outer side of the casing 22, and the end of the central shaft placed on the outer side of the casing 22 has an annular protrusion. The shaft is provided with a threaded through hole along its axial direction, and a compression screw 27 is screwed in the threaded through hole. 22 is fixed with the first bevel gear 23 .

In order to realize the active rotation of the second cylinder 26, when the precision of the workpiece is not high, the left end of the second cylinder 26 protrudes from the first cylinder 21, and the end of the second cylinder 26 protruding from the first cylinder 21 is fixed with a The annular plate 28 has a handle 29 installed on the annular plate 28, and rotating the handle 29 can drive the second cylinder 26 to rotate.

In order to realize the active rotation of the second cylinder 26 and when the workpiece precision is required to be high, there is a rotatable gear on the left side of the left side plate of the frame 1, and a first motor 30 is connected to the gear, and the first motor 30 Fixed on the frame 1, the first motor 30 is a servo motor, the left end of the second cylinder 26 protrudes from the first cylinder 21, and the end of the second cylinder 26 protruding from the first cylinder 21 is fixed with an annular plate 28. The outer surface of the plate 28 has gear teeth that mesh with the gears, and the first motor 30 drives the annular plate 28 to rotate through the gears.

In order to install the drilling rig 11, the support plate 10 and the flat plate 2 are fixed together by a plurality of vertical vertical rods 31, the lower end of the supporting plate 10 has a movable plate 32 parallel to it, the drilling rig 11 is fixed on the lower end of the movable plate 32, A vertical hydraulic cylinder 33 is fixed on the upper end of the support plate 10 . The lower end of the piston rod on the hydraulic cylinder 33 penetrates the support plate 10 and is fixed with the movable plate 32 .

In order to improve the precision and realize automatic operation, a first button 34 for controlling the first motor 30 is installed at the lower end of the support plate 10. When the movable plate 32 moves upward and the first button 34 is pressed, the first motor 30 rotates at a specific angle, A second motor 35 is installed on the upper end of the support plate 10, a cam is fixed on the output shaft of the second motor 35, and a second button 36 is installed on the upper end of the support plate 10. The second button 36 controls the opening or closing of the hydraulic cylinder 33. When the second button 36 is pressed down, the piston rod in the hydraulic cylinder 33 reciprocates up and down once, so as to realize downward drilling.

In order to prevent the workpiece from being deformed under pressure during drilling, and also to prevent the drill from being deviated, there is a support block 37 at the left and right ends of the flat plate 2. The upper end surface of the support block 37 is V-shaped, and the workpiece is placed on the upper end surface of the support block 37. There are a plurality of pits on the upper end surface of the support block 37, a small ball is placed in the pit, a vertical second stud bolt 38 is arranged below the support block 37, and the flat plate 2 and the support block 37 have threads corresponding to the stud bolts. Hole, screw the second stud bolt 38 can control the support block 37 to rise or fall.

It is worth noting that a bearing is installed between the stud 12 and the side plate of the U-shaped plate 3; a bearing is installed between the first cylinder 21 and the side plate of the frame 1, and the second cylinder 26 and the first cylinder 21 are installed between A bearing is installed between the second bevel gear 24 and the second cylinder 26 when the pressing screw 27 on the second bevel gear 24 is pressed against the second cylinder 26, the casing 22 and the second cylinder 26 are fixed, that is, the first bevel gear 23 and the casing 22. At this time, the clamping claw 25 can firmly clamp the workpiece. When the clamping claw 25 is in contact with the workpiece, the second bevel gear 24 can be screwed for fine adjustment at this time, and then the compression screw 27 can be rotated to make the second bevel gear 24. The cylinder 26 and the casing 22 are fixed, and the first motor 30 and the second motor 35 are both servo motors; when in use, for the convenience and safety of drilling, a main power switch can be provided, when the main power switch is turned on , the drilling rig 11 keeps running, the second motor 35 keeps rotating with the cam, when the cam presses down the second button 36 once, the piston rod reciprocates once, when the piston rod drives the connecting plate 14 to move up and return to its original state, the movable plate 32 touches the first button 34, at this time the first motor 30 rotates a certain angle and then stops.

In the initial state, the pressing screw 27 is not in contact with the second cylinder 26, and the claws 25 are placed on the side of the chute away from the center of the housing 22. When using, the end of the workpiece is first placed in the housing 22. Hold the ring plate 28 with one hand, and turn the housing 22 with the other hand. At this time, the claws 25 move closer to the middle under the action of the plane thread on the first bevel gear 23 until the claws 25 clamp the workpiece, and then properly screw the second For the bevel gear 24, when both ends of the workpiece are fixed by the clamp, at this time, screw the compression screw 27 so that the lower end of the compression screw 27 is in contact with the second cylinder 26 and pressed tightly. At this time, the second cylinder 26 and the casing 22 2. The first bevel gears 23 are fixed as a whole, and then the first stud bolts 19 are screwed to make the two U-shaped plates 3 move toward the middle and clamp the workpiece, and the second stud bolts 38 are screwed to make the upper end of the support block 37 The workpiece is touched, and the drilling work can now be carried out.

When drilling, turn on the main switch, at this time the drilling rig 11 starts to work, the first motor 30 does not move, the second motor 35 drives the cam to rotate, when the cam presses down the second button 36 once, the piston rod reciprocates once and stops running, That is, when a hole is punched once, when the piston rod moves upward and returns to its original position, the movable plate 32 at the lower end of the piston rod touches the first button 34, and at this time, the first motor 30 drives the clamp to rotate at a certain angle through the gear and stops until the cam is pressed again. The second button 36, at the same time, the fixture drives the first friction wheel 5 to rotate through the workpiece, the first friction wheel 5 drives the first gear 15 to rotate, the first gear 15 drives the second friction wheel 6 to rotate through the second gear 16, and the third The second friction wheel 6 drives the third friction wheel 9 to rotate through the small friction wheel, and the third friction wheel 9 drives the hollow tube 8 to rotate. The sliding block drives the flat plate 2 to move to the right, and when the cam presses the second button 36 again, the drilling rig 11 drills downward again, and repeats the cycle to achieve drilling along the spiral line.

Outstanding advantages and remarkable progress of the present invention:

1. In the present invention, the power is transmitted to the hollow tube 8 by the workpiece, and then the threaded structure is used to realize the left and right movement of the flat plate 2, and by transforming the traditional three-jaw chuck, it can adapt to workpieces of different diameters, It can realize not only low-precision processing, but also high-precision workpiece drilling.

2. In the present invention, in the drilling of a single part, the transmission ratio of the second friction wheel 6 and the third friction wheel 9 is kept constant, so the holes machined on the workpiece, regardless of the size of the interval between the holes, are They are all on the same spiral line, suitable for small workshops and low-demand parts processing, simple and practical, and the effect is outstanding.

3. The present invention realizes the second friction wheel 6 and the third friction wheel 9 by designing the conical second friction wheel 6, the conical third friction wheel 9 and the small friction wheel that can move back and forth between the two. The transmission ratio changes, so as to realize the requirement of drilling holes along the helical lines of different leads, and the adaptability is wider.

4. Compared with the traditional spiral drilling, the present invention does not require repeated positioning and constant calibration of the position of the drill bit. Under the condition of ensuring the drilling direction of the drill bit, the damage of the drill bit is effectively avoided. On the basis, under the same environment, the present invention can effectively improve the drilling efficiency and drilling accuracy.

The invention has an ingenious structure, can realize punching along the spiral line on the shaft parts, does not need pre-measurement and positioning, can ensure the punching accuracy, and is convenient to operate.

Claims (10)

1. A screw punching device for mechanical parts, characterized in that it comprises a frame (1), and the left and right side plates of the frame (1) have clamps for clamping shaft-type workpieces, and the clamps can drive the workpiece to rotate, and the lower side of the workpiece. There is a horizontal flat plate (2) that can move left and right, the upper end of the flat plate (2) is provided with two U-shaped plates (3) with upward openings, the two U-shaped plates (3) are symmetrical in front and rear, and the two U-shaped plates (3) They can move toward each other or back. Each U-shaped plate (3) has a rotating shaft (4) parallel to the workpiece on one side of the U-shaped plate (3) close to the workpiece. The rotating shaft (4) is rotatably fixed on the U-shaped plate (3), and the rotating shaft (4) A first friction wheel (5) coaxial with it is fixed thereon, the workpiece can drive the first friction wheel (5) to rotate, and there is a conical second friction wheel (6) on one side of the first friction wheel (5). The central axis of the friction wheel (6) is rotatably fixed on the U-shaped plate (3), and the first friction wheel (5) can drive the second friction wheel (6) to rotate; ) one-to-one corresponding screw (7), the screw (7) is sleeved with a hollow tube (8) that can drive the U-shaped plate (3) to move left and right, and a conical third friction wheel (8) is fixed on the hollow tube (8). 9), there is a small friction wheel between the second friction wheel (6) and the third friction wheel (9), the second friction wheel (6) drives the third friction wheel (9) to rotate through the small friction wheel, and the third friction wheel (9) The rotation can drive the hollow tube (8) to rotate so that the hollow tube (8) drives the U-shaped plate (3) to move left and right along the screw (7); there is a horizontal support plate (10) on the upper side of the workpiece, and the support plate ( 10) A drilling rig (11) that can move up and down is installed. 2 . The screw drilling device for mechanical parts according to claim 1 , wherein the small friction wheel can be within the interval between the second friction wheel ( 6 ) and the third friction wheel ( 9 ). 3 . Move back and forth, and the small friction wheel is always in contact with the second friction wheel (6) and the third friction wheel (9). The diameter of the left end of the second friction wheel (6) is larger than the diameter of the right end, and the diameter of the right end of the third friction wheel (9) Larger than the left end diameter, a stud (12) parallel to the axis of the small friction wheel is rotatably fixed on the U-shaped plate (3), a nut (13) is sleeved on the stud (12), and a vertical The connecting plate (14), the small friction wheel is hinged on the lower end of the connecting plate (14), the rotation of the stud (12) drives the nut (13) to reciprocate along it, so that the connecting plate (14) below it drives the small friction wheel to reciprocate. 3 . The screw drilling device for mechanical parts according to claim 1 , wherein a plurality of horizontal guide rods ( 17 ) are fixed to the lower end of the frame ( 1 ), and the guide rods ( 17 ) are sleeved on the guide rod ( 17 ). There is a sliding cylinder (18) that can move left and right along the guide rod (17), a linear bearing is installed between the sliding cylinder (18) and the guide rod (17), and the sliding cylinder (18) and the flat plate (2) are fixed together. 4 . The screw drilling device for mechanical parts according to claim 1 , wherein the end of the rotating shaft ( 4 ) is fixed with a first gear ( 15 ) coaxial with it, and a second friction wheel ( 6 ). 5 . ) are fixed on both ends of the second gear (16) coaxial with the first gear (15) and corresponding to the first gear (15) one-to-one, and the first gear (15) meshes with the second gear (16). 5 . The screw drilling device for mechanical parts according to claim 1 , wherein a groove is formed on the upper end surface of the flat plate ( 2 ) along the front-rear direction, and a rotatable first groove is installed in the groove. 6 . Stud bolts (19), the first stud bolts (19) have sliders (20) at both ends, the first stud bolts (19) and the sliders (20) are connected by threads, and the sliders (20) The upper end is fixed with its corresponding U-shaped plate (3), and by screwing the bolts, the two U-shaped plates (3) can move toward each other or back toward each other in the front-rear direction. 6. The device according to claim 1, characterized in that the clamp comprises a first cylinder (21) horizontally penetrating the side plate of the frame (1), the first cylinder (21). 21) It is rotatably fixed with the side plate of the frame (1), the end of the cylinder close to the center of the frame (1) is fixed with a cylindrical casing (22) coaxial with it, the workpiece horizontally penetrates the casing (22), and the casing ( 22) There is a first bevel gear (23) coaxial with the workpiece, and there are a plurality of second bevel gears (24) on the side plate of the casing (22) that are evenly distributed around the circumference and mesh with the first bevel gear (23). , the second bevel gear (24) can drive the first bevel gear (23) to rotate, and the side plate of the casing (22) close to the center of the frame (1) has a plurality of chute openings along its radial direction. There is a movable jaw (25) that can slide along it, the end face of the first bevel gear (23) close to the center of the frame (1) and the jaw (25) are engaged by plane threads, and the first bevel gear (23) rotates The clamping claw (25) can be driven to move toward the center of the housing (22) at the same time until the workpiece is fixed. 7 . The screw drilling device for mechanical parts according to claim 6 , wherein a second bevel gear ( 23 ) coaxial with the first bevel gear ( 23 ) is fixed on the side away from the center of the frame ( 1 ). 8 . The cylinder (26), the second cylinder (26) can be actively rotated, the central shaft of the second bevel gear (24) is rotatably fixed on the side plate of the casing (22), and the other end of the central shaft penetrates the side of the casing (22) The plate is placed on the outer side of the casing (22), the end of the central shaft placed on the outer side of the casing (22) has an annular protrusion, the central shaft is provided with a threaded through hole along its axial direction, and the threaded through hole is screwed with a compression Screw (27), screw the pressing screw (27) and when the pressing screw (27) is firmly pressed against the second cylinder (26), the housing (22) and the first bevel gear (23) are fixed on the Together. 8 . The screw punching device for mechanical parts according to claim 1 , wherein the left side of the left side plate of the frame ( 1 ) has a rotatable gear, and the gear is connected with a first motor. 9 . (30), the first motor (30) is fixed on the frame (1), the first motor (30) is a servo motor, the left end of the second cylinder (26) protrudes from the first cylinder (21), and the second circular The end of the cylinder (26) protruding from the first cylinder (21) is fixed with an annular plate (28), the outer circular surface of the annular plate (28) has gear teeth meshing with the gear, and the first motor (30) drives the annular plate (28) through the gear. Plate (28) rotates. 9 . The screw drilling device for mechanical parts according to claim 1 , wherein a first button ( 34 ) for controlling the first motor ( 30 ) is installed at the lower end of the support plate ( 10 ), and when the support plate ( 10 ) moves When the plate (32) moves upward and the first button (34) is pressed, the first motor (30) rotates by a specific angle, the upper end of the support plate (10) is mounted with a second motor (35), and the output shaft of the second motor (35) A cam is fixed thereon, and a second button (36) is installed on the upper end of the support plate (10). The second button (36) controls the opening or closing of the hydraulic cylinder (33). When the cam presses the second button (36) downward, The piston rod in the hydraulic cylinder (33) reciprocates up and down once to realize downward drilling. 10 . The device for screw drilling of mechanical parts according to claim 1 , characterized in that there is a support block ( 37 ) at the left and right ends of the flat plate ( 2 ), and the upper end surface of the support block ( 37 ) is V-shaped. 11 . The workpiece is placed on the upper end face of the support block (37), there are multiple pits on the upper end face of the support block (37), a small ball is placed in the pit, and a vertical second stud ( 38), the flat plate (2) and the support plate (10) have threaded holes corresponding to the stud bolts, and screwing the second stud bolt (38) can control the support block (37) to rise or fall.

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