CN201669435U - Special drilling rig for center hole - Google Patents

Abstract

The utility model discloses a central hole-dedicated drill, which mainly comprises a base, a drilling mechanism and a clamping mechanism, the drilling mechanism and the clamping mechanism are arranged on the base, the clamping mechanism comprises a screw, two clamping nut blocks and a guide way, the two clamping nut blocks are screwed on the screw and rotate in opposite directions, meanwhile, the two clamping nut blocks are slidably connected on the guide way, the screw and the guide way are arranged on the base, and the drilling mechanism is positioned at the sides of the two clamping nut blocks. The central hole-dedicated drill is characterized by simple structure and convenient carrying; a rotor is placed flat on a rotor support, the center of a drill bit of the drill is aligned with the center of the rotor, the rotor is directly clamped when the position is right, and thereby clamping is finished; the hoisting of a travelling crane and a great deal of auxiliary clamping time are reduced, moreover, the center of a circle can more accurately found, positioning is more accurate, and while the machining efficiency is increased, the machining quality is increased as well.

Description

Special drilling rig for center hole

technical field

The utility model relates to a drilling machine, in particular to a special drilling machine for center holes used for processing the center holes of steam turbine rotors.

Background technique

At present, in the processing industry of steam turbine spare parts, the machining of the center hole of the steam turbine rotor is usually processed by floor boring and milling machines and turning and milling centers. The clamping of the steam turbine rotor is inconvenient, and the process of finding the center of the circle is relatively complicated. Not only is the production efficiency low, but the processing quality will be affected if the center of the circle is found and positioned slightly wrong, and at the same time, a large amount of already tight machine tool processing capacity is occupied. , become the bottleneck of steam turbine spare parts processing. With the continuous increase of demand in the steam turbine market and the sharp increase in product sales, the existing production and processing progress can no longer meet the production demand. Therefore, people have been longing for a special drilling rig with simple structure and easy use to solve the bottleneck in the production and processing process. question.

Contents of the invention

The purpose of this utility model is to provide a special drilling machine for center hole with convenient clamping and precise positioning in order to solve the above technical deficiencies.

In order to achieve the above object, the special drilling machine for central hole designed by the utility model mainly includes a base, a drilling device and a clamping device, the drilling device and the clamping device are arranged on the base, and the clamping device includes a screw mandrel, Two clamping nut blocks and guide rails, the two clamping nut blocks are set on the screw rod through threaded connection and the direction of rotation is opposite, while the two clamping nut blocks are slidably connected on the guide rail, the screw rod and guide rail are set on the base Above, the drilling device is located on the side of the two clamping nut blocks. The sliding connection mentioned herein may be that a sliding groove is arranged on the guide rail, and the clamping nut block is arranged in the sliding groove.

As a preference, adjusting nuts are provided at both ends of the screw rod.

As a preference, a rolling linear guide rail pair is provided below the clamping nut block, the rolling linear guide rail pair includes a guide rail and two sliders, the sliders can slide on the guide rail, and the clamping nut blocks are respectively fixed on On the slider, thus forming a sliding connection with the guide rail. The threads of the clamping nut block rotate to one left and one right, and the screw transmission between the screw and the screw makes the two clamping nut blocks approach or leave at the same time, so as to achieve the purpose of quickly clamping and quickly releasing the workpiece. In addition, the rolling linear guide pair is used in this mechanism mainly to eliminate the upward bending force of the nut block and the screw rod when clamping the workpiece, to ensure the accurate positioning of the center of the clamped nut block, and to strengthen the strength of the screw rod. Since the screw rod will produce an upward overturning force when clamping the workpiece, the screw rod will be bent, so installing a linear guide pair under the clamping nut block can not only offset the overturning force generated by the screw rod clamping, but also in the drilling The left and right overturning force is also generated when drilling the hole, and the linear guide pair can also overcome this overturning force.

Preferably, the drilling device is arranged on the base through a liftable structure. Thereby, the center of the drill bit of the drilling device can be adjusted to be consistent with the machining center of the workpiece by lifting and lowering.

Preferably, the clamping nut block is a V-shaped clamping nut block.

The special drilling machine for the central hole obtained by the utility model has a simple structure and is convenient to carry. In the past, the rotor usually needs to be hoisted to the floor boring and milling machine and the turning and milling center for processing, but the special drilling machine for center hole only needs to place the rotor flat on the rotor frame, and adjust the drill center of the drilling device to be consistent with the rotor center. When the position is right, the rotor can be directly clamped to complete the clamping, which reduces the hoisting of the crane and many auxiliary clamping times, and finds the center of the circle and the positioning is more accurate. It improves the processing efficiency and improves the processing quality at the same time.

Description of drawings

Fig. 1 is the front view of the special drilling machine for central hole of embodiment 1;

Fig. 2 is a side view of the special drilling machine for the center hole of Embodiment 1.

In the figure: V-shaped clamping nut block 1, screw rod 2, adjusting nut 3, slider 4, rolling linear guide pair 5, base 6, drilling device 7, guide rail 8.

Detailed ways

Below by embodiment in conjunction with accompanying drawing, the utility model is further described.

Example 1

As shown in Figure 1, the special drilling machine for central hole described in this embodiment mainly includes a base 6, a drilling device 7 and a clamping device, the drilling device 7 and the clamping device are arranged on the base 6, and the clamping device includes Screw rod 2, two V-shaped clamping nut blocks 1 and guide rail 8, two V-shaped clamping nut blocks 1 are arranged on the screw rod 2 through threaded connection and the direction of rotation is opposite, the bottom of V-shaped clamping nut block 1 is set There is a rolling linear guide rail pair 5, the rolling linear guide rail pair 5 includes a guide rail 8 and a slider 4, and the V-shaped clamping nut block 1 is respectively fixed on the slider 4 to form a sliding connection with the guide rail, the screw rod 2 and the guide rail 8 Set on the base 6, the drilling device 7 is located on the side of the two V-shaped clamping nut blocks 1, and the two ends of the screw rod 2 are provided with adjusting nuts 3. The drilling device 7 is a drilling machine of the prior art, so it is not repeated here.

When in use, turn the screw rod 2 manually so that one left and one right V-shaped clamping nut blocks 1 move to the middle to clamp the workpiece, in order to reduce the upward bending force of the screw rod 2 when the V-shaped clamping nut block 1 clamps the workpiece, Therefore, the rolling linear guide rail pair 5 is installed on the base 6 to prevent the V-shaped nut block from generating an overturning moment and cause the center of the V-shaped nut block to be misaligned with the center of the main shaft of the drilling device 7, and increase the strength of the screw mandrel 2 at the same time. The center of the workpiece center and the drilling device 7 main shafts can be adjusted by the left and right adjustment nuts 3 (for adjustment during installation). The clamping device is centered by the V-shaped clamping nut block 1, and the equidistant left and right spirals drive the two sliding seats to move at the same speed to clamp the workpiece in the middle, and when they are separated outward, the workpiece is released. In the past, the rotor usually needs to be hoisted to the floor boring and milling machine and the turning and milling center for processing, but now it is only necessary to place the rotor flat on the rotor frame, and use the hand-push lifting trolley to adjust the drilling machine center of the drilling device 7 to the center of the rotor. Consistent, when the position is right, directly clamp the rotor, because the center of the two V-shaped nut blocks is consistent with the center of the drilling machine, so it can be processed as long as it is clamped. This can reduce the hoisting of the crane and many auxiliary clamping times.

In order to make the drilling device 7 liftable more conveniently, the drilling device 7 is arranged on the base 6 through a liftable structure. The liftable structure can be a gear and rack structure, or a screw mandrel 2 and a nut structure, or a sprocket and chain structure. The liftable structure is a prior art, and will not be described in detail here.

The drilling device 7 described in this embodiment can be transformed by using a magnetic drill, the magnetic base 6 of the magnetic drill is removed, and directly connected to the base 6 by bolts, so that the structure is small and the mechanical and mechanical properties of the drilling device 7 are reduced. Electrical design, the magnetic drill itself has mechanical two-speed stepless speed regulation, which can meet the speed requirements of center hole processing.

Claims (7)

1. A special drilling machine for central holes, which mainly includes a base, a drilling device and a clamping device, the drilling device and the clamping device are arranged on the base, and it is characterized in that the clamping device includes a screw mandrel, two clamping devices Nut blocks and guide rails, two clamping nut blocks are arranged on the screw rod through threaded connection and the rotation directions are opposite, and at the same time, the two clamping nut blocks are slidably connected on the guide rail, the screw rod and guide rail are arranged on the base, the The drilling device is located on the side of the two clamping nut blocks. 2. The special drilling machine for center hole according to claim 1, characterized in that adjusting nuts are provided at both ends of the screw rod. 3. The special drilling rig for center hole according to claim 1 or 2, characterized in that a rolling linear guide rail pair is provided under the clamping nut block, and the rolling linear guide rail pair includes a guide rail and two sliders, the The clamping nut blocks are respectively fixedly arranged on the sliding blocks, so as to form a sliding connection with the guide rail. 4. The special drilling machine for center hole according to claim 1 or 2, characterized in that the drilling device is arranged on the base through a liftable structure. 5. The special drilling machine for center hole according to claim 3, characterized in that the drilling device is arranged on the base through a liftable structure. 6. The special drilling machine for center hole according to claim 4, characterized in that said clamping nut block is a V-shaped clamping nut block. 7. The special drilling machine for center hole according to claim 5, characterized in that said clamping nut block is a V-shaped clamping nut block.

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