CN205587681U - Five smart profile universal fixturings of turbine blade - Google Patents

Abstract

A universal fixture for the five-axis precision surface of a steam turbine blade, including a fixture positioning element, a fixture adjustment and a pressing element; the fixture positioning element is composed of a clamp body (7) with a tapered shank, a positioning pin (1), and a thimble seat (13) , the clamp body (7) is provided with a T-shaped groove (11), and the surface of the T-shaped groove is provided with a positioning pin hole, and the positioning pin (1) is used to locate the clamp body with a tapered handle and the thimble seat concentric with it, so that the clamp The concrete is kept concentric with the thimble seat; the two ends of the thimble seat are screwed with square head set screws for fine-tuning the thimble: use it to position on the machine tool so that the center of the thimble on the thimble seat coincides with the center of the machine tool; the clamp body and the thimble There are also hexagon socket screws for fixing between the seats; the fixture adjustment and pressing elements are composed of double-headed trapezoidal threaded bolts (5), a pair of T-shaped sliders (3) embedded in T-shaped grooves (11), Left slide block (4), right slide block (6) and jaw constitute; Left slide block and right slide block utilize the trapezoidal screw thread of double-ended trapezoidal screw bolt to lock. The utility model adopts the adjustment element and the clamping element of the fixture, so the operation is simple, the clamping is firm, and the application range is wide.

Description

A general-purpose fixture for five-axis precise profile surfaces of steam turbine blades

technical field

The utility model relates to a tool fixture for mechanical processing, in particular to a universal fixture for a five-axis fine profile surface of a steam turbine blade.

Background technique

When machining blades on a five-axis machine tool, different positioning surfaces and fixtures are often required to process the blade root, assembly surface, and profile of the blade. Different positioning surfaces and fixtures lead to uncertainty in each clamping position. Tool setting is required for every blade, which not only greatly reduces labor productivity and increases production costs, but also prevents the processing requirements of the blade root, assembly surface and profile from being improved.

Due to the variety of steam turbine motor and stationary blades, if in the manufacturing process, different specifications of fixtures are designed for different types of blades to meet the production needs of different types of blades, it will not only result in waste of processing costs, low efficiency, but also give On-site production and fixture management bring a lot of inconvenience. There is no disclosure of a universal fixture for the five-axis fine profile surface of a steam turbine blade.

Utility model content

The purpose of this utility model is: to provide a universal fixture for the five-axis precision surface of the steam turbine blade, which has a wide range of applications and is easy to operate. It only needs to have a top hole and a process step that can be clamped to ensure the processing of the workpiece and ensure the accuracy requirements, shortening the operation. time for workers to calibrate overpaid fixtures.

The technical solution of the utility model is: a universal fixture for the five-axis precision surface of the steam turbine blade, including a fixture positioning element, a fixture adjustment and a pressing element;

The clamp positioning element is composed of a clamp body 7 with a tapered shank, a positioning pin 1, and a thimble seat 13. The clamp body 7 is provided with a T-shaped groove 11, and the surface of the T-shaped groove is provided with a positioning pin hole, and the positioning pin 1 is used for positioning. The clamp body with tapered shank and the concentric thimble seat keep the clamp body and the thimble seat concentric; the two ends of the thimble seat are screwed with square head set screws for fine adjustment of the thimble, and are positioned on the machine tool through the set screws , so that the center of the thimble on the thimble seat coincides with the center of the machine tool; there is also a hexagon socket screw for fixing between the clamp body and the thimble seat;

The clamp adjustment and pressing element is composed of a double-headed trapezoidal threaded bolt 5, a pair of T-shaped sliders 3 embedded in a T-shaped groove 11, a left slider 4, a right slider 6 and jaws. One end is a T-shaped end embedded in a T-shaped slot, and the other end is a mounting groove for the left slider 4 and the right slider 6. The jaws are fixed on the left slider 4 and the right slider 6. The first T-shaped slider 3 and After the left slider 4 is connected, put it into the T-shaped groove of the clamp body together. There is a screw hole inside the first T-shaped slider to fix one end of the double-headed trapezoidal threaded bolt, and then put the other T-shaped screw to fix the right slider. The slider is connected to the other end of the double-headed trapezoidal threaded bolt, and the movement of the left slider 4 and the right slider 6 is realized through the transmission thread of the double-headed trapezoidal threaded bolt; the left slider and the right slider use the double-headed trapezoidal The trapezoidal thread of the threaded bolt is used for locking.

Put the thimble assembly in the mounting hole of the thimble seat, install the end face positioning block on the end surface of the thimble seat, and use the spring of the thimble assembly to tighten the back of the thimble seat, and use the expansion and contraction of the spring to realize the pressing of the thimble seat on the clamp body.

The contact surfaces of the left slider, the right slider and the jaws are all serrated, and the two jaws can be connected to the left slider and the right slider respectively through two T-shaped sliders, and the movement of the T-shaped sliders And the movement of the tooth shape to realize the up and down adjustment.

The thimble assembly includes a thimble 17 , a spring 18 , and a thimble seat positioning hole 19 .

The clamp body with tapered shank and the concentric thimble seat are connected with the machine tool to ensure concentricity and accurate positioning.

The left slider and the right slider use the transmission thread of the double-headed trapezoidal threaded bolt, and the jaw moves through the T-shaped slider and the tooth shape to communicate with the left

The connection of the slider and the right slider has a large adjustment range. The transmission thread of the double-ended trapezoidal threaded bolt; the spring is pressed, and the pressing force is large.

Further, the clamp body with the tapered shank and the concentric thimble seat are concentric with the machine tool, and the positioning is accurate.

Further, the left slider and the right slider utilize the transmission thread of the double-headed trapezoidal threaded bolt, and the left slider and the right slider use the combination of the T-shaped slider and the movement of the tooth shape and the jaws, so the adjustment is convenient and the range is large. When using this fixture to process blades, you only need to use the thimble concentric with the machine tool to press the top hole of the blade, and then use the jaws to clamp the process steps of the blade.

Adjust the distance between the left slider and the right slider through the transmission thread of the double-ended trapezoidal threaded bolt, so that the jaws can clamp the technological step of the blade. If the technological step of the blade is large and the distance between the jaws is not enough, you can also pass The tooth shape between the jaws and the left and right sliders and the position of the T-shaped sliders in the T-shaped grooves of the left and right sliders are used to increase the position between the two jaws to meet the requirements. The technological steps for tightening the blades, these are the adjustment elements and clamping elements of the fixture, which are easy to operate, reliable in clamping, and have a wide range of applications.

The beneficial effect of the utility model is that the fixture is concentric with the machine tool through the tapered shank at the rear end of the clamp body and the concentric thimble seat, and the precise positioning can be realized by pressing against it. After positioning, the process step of the blade can be clamped with the jaw processed. After the processing is completed, it is enough to loosen the thimble seat and the jaws. It is suitable for steam turbine motors and a wide range of stationary blades, which avoids the waste of processing overpaid fixture materials, reduces fixture design and production costs, and also greatly saves on-site production and fixture management space. At the same time, the machining accuracy of the blade is also improved. The utility model can not only ensure the processing requirements of workpieces, improve labor productivity, but also reduce the workload of fixture designers, save fixture manufacturing materials and production costs, shorten the time for operators to calibrate overpaid fixtures, and can improve on-site production and fixtures. management brings great convenience.

Description of drawings

Fig. 1 is an end view of a universal fixture for a five-axis precision surface of a steam turbine blade;

Fig. 2 is a sectional view of the longitudinal section of the milling surface clamp of Fig. 1;

Fig. 3 is a 3D diagram of the clip body;

Figure 4 is a 3D diagram of the slider.

Figure 5a and Figure 5b are a 3D view and a cross-sectional view of the thimble seat fixture, respectively.

Fig. 6 is a 3D diagram of a universal fixture for a five-axis precision surface of a steam turbine blade (with a blade workpiece);

Fig. 7 is a 3D diagram of a universal fixture for a five-axis precision surface of a steam turbine blade (without a blade workpiece).

Pictured: Homemade Locating pin 1, jaw 2, T-shaped slider 3, left slider 4, double-headed trapezoidal thread bolt 5, right slider 6, clamp body 7, taper handle connection hole 8, positioning card slot 9, clamp body Locating pin holes 10, 14, clamp body T-slot 11, slider T-slot 12, thimble seat 13, thimble seat Locating pin hole 14, end face locating block 15, square head set screw 16, thimble 17, spring 18, thimble seat locating hole 19.

detailed description

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

As shown in the figure, the five-axis fine surface universal fixture for steam turbine blades includes fixture positioning elements, fixture adjusting elements and fixture pressing elements;

The fixture positioning element is composed of a clamp body and a thimble seat. The clamp body and the thimble seat are fixed with hexagon socket screws, and the positioning pin is used to locate the clamp body with a tapered shank and the concentric thimble seat, so that the clamp body and the thimble seat are kept concentric. The square head set screws on both sides of the thimble seat can be used for fine adjustment of the thimble; then positioned on the machine tool so that the center of the thimble coincides with the center of the machine tool. The fixture positioning element is made of homemade Positioning pin 1, clamp body 7, taper shank connection hole 8, positioning card slot 9, Clamp body positioning pin hole 10, thimble seat 13, thimble seat Positioning pin hole 14, square head set screw 16, thimble 17, and thimble seat positioning hole 19 are formed. Locating pin 1 Locating clamp specific Locating pin hole 10 and thimble seat Locating pin hole 14, make the center of thimble 17 coincide with the center of the taper shank of chuck body 7, fix with screw. If there is a slight deviation, fine adjustment can be carried out on both sides of the thimble seat 13 with the square head set screw 16. Then the positioning card slot 9 is aligned with the positioning block on the machine tool, and the taper shank connection hole 8 is connected with the machine tool to ensure that the thimble of the fixture is concentric with the machine tool, and finally tighten to complete the positioning.

The fixture adjustment element is composed of jaw 2, T-shaped slider 3, left slider 4, double-headed trapezoidal threaded bolt 5, right slider 6, clamp body T-shaped groove 11, and slider T-shaped groove 12. Connect the left slider 4 with one end of the double-headed trapezoidal threaded bolt 5, then put them together into the T-shaped groove 11 of the clamp body, and then put the right slider 6 into the T-shaped groove 11 of the clamp body and connect it with the double-headed ladder The other end of type threaded bolt 5 is connected well. Finally, the up and down movement of the fixture can be realized by the transmission thread of the double-headed trapezoidal threaded bolt 5; the two T-shaped sliders 3 are respectively put into the slider T-shaped slots 12 of the left slider 4 and the right slider 6, and then Engage the tooth shape of the jaw 2 with the tooth shape of the left slider 4 and the right slider 6, and tighten the T-shaped slider 3 placed in the T-shaped slot 12 of the slider with a hexagon socket screw through the jaw 2 to fix the clamp Mouth 2 and left slide block 4, right slide block 6, just can adjust the scope of fixture by the movement of T-shaped slide block 3 and tooth profile like this, and operation is simple, and the bite of tooth profile is also difficult for sliding.

The left slider, the right slider and the jaws are all toothed, and the two jaws are connected to the left slider and the right slider through two T-shaped sliders, and the movement of the T-shaped sliders and the teeth is realized. Adjust up and down.

The clamp pressing element is composed of left slider 4, double-headed trapezoidal threaded bolt 5, right slider 6, thimble seat 13, end face positioning block 15, thimble 17, spring 18, and thimble seat positioning hole 19. The slider 4 is connected with one end of the double-headed trapezoidal threaded bolt 5, and then they are put into the T-shaped groove 11 of the clamp body together, and then the right slider 6 is also put into the T-shaped groove 11 of the clamp body and connected with the double-headed trapezoidal screw thread. The other end of bolt 5 is connected. After the blade is positioned, pull the inner hexagonal head at both ends of the double-ended trapezoidal threaded bolt 5 with an inner hexagonal wrench, and press the blade tightly.

Put the spring 18 into the thimble seat positioning hole 19, then put the thimble 17 into the thimble seat positioning hole 19, connect the end face positioning block 15 with the thimble seat 13 with the slotted countersunk screw, fix the thimble 17 and tighten it The spring 18 compresses the thimble 17 with the pressing force of the spring 18.

When in use, first put the thimble 17 in the thimble seat 13 and fix it with a self-made Locating pin 1 is positioned on the clamp body Locating pin hole 10 and thimble seat In the positioning pin hole 14, make the center of the thimble 17 coincide with the center of the taper shank of the clamp body 7, and be installed on the machine tool after fixing to ensure that the center of the clamp thimble coincides with the center of the machine tool. Then adjust the distance between the two jaws 2 through the double-headed trapezoidal threaded bolt 5, the left slider 4, and the right slider 6. If the distance is still not enough, you can expand the two jaws by adjusting the T-shaped slider 3 and the tooth profile. The distance between the jaws 2. Put the qualified blade 20 into the jaws 2, hold the blade 17 with the thimble 17, and use the hexagonal wrench to pull the double-headed trapezoidal threaded bolt 5 to make the blade 20 clamped by the jaws 2 after fixing.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (4)

1. A universal clamp for the five-axis precision profile of a steam turbine blade is characterized in that: it comprises a clamp positioning element, a clamp adjustment and a pressing element; the clamp positioning element consists of a clamp body (7) with a tapered handle, a positioning pin (1 ), a thimble seat (13), a T-shaped slot (11) is provided on the clamp body (7), and a positioning pin hole is provided on the surface of the T-shaped slot, and the positioning pin (1) is used to locate the clamp body with a tapered shank and the The concentric thimble seat keeps the clamp body and the thimble seat concentric; square head set screws are screwed at both ends of the thimble seat for fine adjustment of the thimble, and are positioned on the machine tool through the set screw to make the thimble on the thimble seat The center coincides with the center of the machine tool; there are hexagon socket screws for fixing between the clamp body and the thimble seat; The clamp adjustment and pressing elements are composed of double-headed trapezoidal threaded bolts (5), a pair of T-shaped sliders (3) embedded in T-shaped slots (11), left sliders (4), right sliders (6) One end of the T-shaped slider is a T-shaped end embedded in the T-shaped slot, and the other end is the installation groove for the left and right sliders. The jaws are fixed on the left and right sliders. T-shaped After the slider and the left slider are connected, put them into the T-shaped slot of the clamp body together. There is a screw hole inside the first T-shaped slider to fix one end of the double-headed trapezoidal threaded bolt, and then fix the other end of the right slider. The T-shaped slider is connected with the other end of the double-headed trapezoidal threaded bolt, and the movement of the left slider and the right slider is realized through the transmission thread of the double-headed trapezoidal threaded bolt; the left and right sliders use the double-headed trapezoidal The trapezoidal thread of the threaded bolt is used for locking. 2. The universal fixture for the five-axis precision surface of a steam turbine blade according to claim 1, characterized in that: a thimble assembly is arranged in the mounting hole of the thimble seat, and the end face of the thimble seat is positioned with an end face positioning block, and the back of the thimble seat is used for positioning. The spring of the thimble assembly is tightened, and the expansion and contraction of the spring is used to realize the pressing of the thimble seat on the clamp body. 3. The universal clamp for the five-axis precision surface of the steam turbine blade according to claim 1, characterized in that: the contact surfaces of the left slider, the right slider and the jaws all have serrations, and the two jaws pass through two The T-shaped slide block is connected with the left slide block and the right slide block respectively, and the up-down adjustment is realized through the movement of the T-shaped slide block and the movement of the tooth shape. 4. The universal fixture for the five-axis fine profile of the steam turbine blade according to claim 1, characterized in that: the fixture body with a tapered shank and the concentric thimble seat are connected to the machine tool.