A coating fixture for worm gear

Abstract

A worm bar coating fixture belongs to a kind of tooling fixture, which is used to solve the problem that the thickness of the surface of the existing worm bar is uneven during coating, and the thickness of the coating is difficult to meet the processing requirements. The present invention includes a base, a worm, an oil tank pad, two clamping blocks and two supports. The two supports are fixed on the base, the worm is placed on the two supports, and the two clamping blocks are fixedly connected to the base to press the worm. The worm bar is fixedly set on the base, the worm bar cooperates with the worm, and oil tank pads are pasted on both sides of each tooth groove on the worm. Multiple oil tank pads are arranged in a row and are located in the tooth groove of the worm bar. The present invention can make the coating thickness on the surface of the worm bar uniform and consistent through the precise cooperation between the worm and the worm bar, meeting the manufacturing precision requirements.

Description

Technical Field

[0001] The invention relates to a coating fixture, in particular to a worm bar coating fixture. Background Art

[0002] The hydrostatic worm-nut mechanism is to inject pressure oil into the meshing tooth surface of the worm-nut to form a certain thickness of high-rigidity oil film, separate the two tooth surfaces, and change the mechanical friction between the two meshing tooth surfaces into pure liquid friction. It realizes the long-distance movement of moving parts with high efficiency, high precision, high load, high stability and long life. The friction resistance is small. It has a starting friction factor, which can be as low as 0.0005, low power consumption, high transmission efficiency, which can reach 94% to 98%, and is also very stable at low speed, with good accuracy, good vibration resistance and high axial stiffness. The worm can be extended and is suitable for long-stroke moving parts. The hydrostatic worm-nut transmission has the characteristics of pure liquid friction and the characteristics of the worm-nut mechanical structure. Therefore, it is particularly suitable for the feed drive system of heavy machine tools. It is mainly used for the linear moving mechanism of heavy and large machine tool worktables, gantries, columns, slides, rams and other components.

[0003] After processing, the worm bar needs to be coated on its surface to achieve the purpose of wear resistance. The thickness and uniformity of the worm bar coating affect the accuracy during the transmission process. Due to the special structure of the worm bar, the thickness of the surface coating is uneven after coating, and the thickness of the coating is difficult to meet the processing requirements. Repeated grinding is required, and the processing is time-consuming and labor-intensive. Summary of the invention

[0004] The present invention provides a worm bar coating fixture to solve the problem that the surface thickness of the existing worm bar is uneven during coating, and the thickness of the coating is difficult to meet the processing requirements.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A worm gear coating fixture comprises a base, a worm, an oil tank pad, two clamping blocks and two supports, wherein the two supports are fixed on the base, the worm is placed on the two supports, the two clamping blocks are fixedly connected to the base to press the worm, the worm gear is fixedly arranged on the base, the worm gear matches the worm, oil tank pads are pasted on both sides of each tooth groove on the worm, and multiple oil tank pads are arranged in a row and located in the tooth groove of the worm gear.

[0007] Preferably, a worm gear coating fixture further includes two first pressing blocks, each of which is machined with an arc surface that matches the axial surface of the worm, and each first pressing block is located between each clamping block and the worm.

[0008] Preferably, a worm gear coating fixture further comprises two support bars, wherein the two support bars are fixed above the base, and the bottom of the worm is in contact with the two support bars.

[0009] Preferably, a worm strip coating fixture further includes two connecting plates, both of which are processed with worm teeth, each connecting plate is arranged between each support and the worm strip, and is connected to the worm teeth on both sides of the worm strip.

[0010] Preferably, a worm gear coating fixture further comprises two end baffles, each end baffle being arranged between each connecting plate and each support.

[0011] Preferably, a worm nut coating fixture further comprises a set screw, a support is threaded with the set screw, and the end of the set screw abuts against the end baffle.

[0012] Preferably, a worm strip coating fixture also includes two side baffles, on which worm strip teeth cooperating with the worm strip are respectively processed, and the two side baffles are arranged on the base, and the two side baffles are located on both sides of the worm strip and cooperate with the worm strip.

[0013] Preferably, a worm gear coating fixture further includes two groups of second pressing blocks, each group of second pressing blocks is detachably connected to the base, and each side baffle is pressed by a group of second pressing blocks.

[0014] Preferably, a worm nut coating fixture further includes two fixing seats and two screws a, the two fixing seats are respectively arranged on both sides of the base, a screw a is screwed on the top of each fixing seat, and the two screws a correspond to the positions of the worm.

[0015] Preferably, the worm and the support are connected via a positioning pin.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] After the worm strip is fixed on the base and precisely positioned and clamped, a release agent is applied to the surface of the worm, and the coating material is poured into the worm strip on the base so that it is fully filled in the worm tooth groove. The worm is then placed on the support, and after the position is adjusted, it is closely matched with the worm strip and fixed, and the excess coating is squeezed to the outside of the worm strip. After the coating solidifies, it is disassembled, and the coating falls off on the surface of the worm, so that the worm can be used multiple times. The present invention can make the coating thickness on the surface of the worm strip uniform and consistent through the precise matching of the worm and the worm strip, meeting the precision requirements of manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the front view of the snail mother strip;

[0019] Figure 2 It is a top view of the snail mother strip;

[0020] Figure 3 yes Figure 2 AA section view;

[0021] Figure 4 is an axonometric view of the present invention;

[0022] Figure 5 is an axonometric view of the present invention without a worm;

[0023] Figure 6 It is a front view of the present invention;

[0024] Figure 7 is a side view of the present invention;

[0025] Figure 8 is a top view of the present invention;

[0026] Fig. 9 yes Figure 8 BB rotated section view;

[0027] Fig.10 It is the front view of the worm;

[0028] Fig.11 yes Fig.10 A local enlarged view at location I;

[0029] Fig.12 yes Fig.11 CC section view;

[0030] Fig.13 It is the main view of the connecting plate;

[0031] Fig.14 yes Fig.13 A cross-sectional view of

[0032] Fig.15 is a top view of the connecting plate;

[0033] The reference numerals in the figure are: 1. base, 2. worm, 3. oil tank gasket, 4. clamping block, 5. support, 6. worm bar, 7. first pressure block, 8. support bar, 9. connecting plate, 10. end baffle, 11. set screw, 12. side baffle, 13. positioning pin, 14. second pressure block, 15. fixing seat, 16. screw a, 7-1 arc surface, 17. plate. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method is given, but the protection scope of the present invention is not limited to the following embodiments.

[0035] Example 1: Combination Figure 1-Figure 12To illustrate the present embodiment, the present embodiment relates to a worm bar coating fixture, comprising a base 1, a worm 2, an oil tank pad 3, two clamping blocks 4 and two supports 5, the two supports 5 are fixed on the base 1, the worm 2 is placed on the two supports 5, the two clamping blocks 4 are fixedly connected to the base 1 to press the worm 2, a worm bar 6 is fixedly arranged on the base 1, the worm bar 6 cooperates with the worm 2, and oil tank pads 3 are pasted on both sides of each tooth groove on the worm 2, and multiple oil tank pads 3 are arranged in a row and are located in the tooth groove of the worm bar 6, and are in contact with the teeth of the worm bar 6 to form an oil tank.

[0036] Optionally, the oil tank gasket 3 is made of non-metallic material, preferably plastic material, and is bonded to the worm 2 by glue, so that after coating, the worm 2 can be removed from the worm bar 6, and the oil tank gasket 3 can be dug out to form an oil tank.

[0037] like Figure 2 , Figure 3 and Fig. 9 As shown, in this embodiment, an inclined threaded hole is processed on the base 1, and an inclined countersunk hole is processed on the worm nut 6. Screws are arranged in the countersunk hole of the worm nut 6, and the screws are fixedly connected to the base 1.

[0038] Alternatively, if Fig.12 As shown, the oil tank gasket 3 is fan-shaped.

[0039] The present embodiment provides a worm strip coating fixture, which also includes two first pressing blocks 7. Each first pressing block 7 is processed with an arc surface 7-1 that matches the axial surface of the worm 2. Each first pressing block 7 is located between each clamping block 4 and the worm 2. The clamping block 4 is connected to the base 1 by a screw. The clamping block 4 is pressed by the first pressing block 7 to make the worm 2 fit tightly against the support 5, ensure the center distance between the worm 2 and the worm strip 6, and control the coating thickness within a reasonable range. At the same time, the arc surface 7-1 of the first pressing block 7 can ensure that the axis of the worm 2 is parallel to the axis of the worm strip 6, so that the coating thickness of the worm strip 6 is uniform along all directions.

[0040] In this embodiment, the first pressing block 7 is connected to the support 5 by screws to facilitate processing. The first pressing block 7 and the support 5 can also be made into an integral part.

[0041] This embodiment is a worm gear coating fixture, such as Fig. 9 As shown, two support bars 8 are also included. Two parallel square grooves are processed on the base 1. The two support bars 8 are set in the square grooves of the base 1 by screws, and the top surfaces of the support bars 8 are coplanar. The bottom of the worm bar 6 contacts the two support bars 8 to ensure that the worm bar 6 is level. The support bars 8 in this embodiment can also be replaced by pads or positioning pins.

[0042] This embodiment is a worm gear coating fixture, such as Figure 5 , Figure 6 , Fig.13 , Fig.14 , Fig.15 As shown, it also includes two connecting plates 9, both of which are processed with worm teeth. Each connecting plate 9 is arranged between each support 5 and the worm bar 6, and is connected with the worm teeth on both sides of the worm bar 6. During the coating process, the ends of the worm grooves on the worm bar 6 can also be coated to prevent the worm grooves at the ends of the worm bar 6 from being seriously worn during the working process, resulting in a decrease in accuracy and affecting the processing accuracy of the machine tool. Figure 12-14 As shown, it is a schematic diagram of the connecting plate 9. The end face of each connecting plate 9 is inclined relative to the other end face, and the inclination angle is consistent with the inclination angle of the end of the worm bar 6, so that the thread pressing can be connected when the two inclined surfaces are in contact, further ensuring that the surface of the teeth on the worm bar can be adhered to the coating.

[0043] This embodiment is a worm gear coating fixture, such as Figure 5 As shown, two end baffles 10 are also included, each of which is arranged between each connecting plate 9 and each support 5. The height of each end baffle 10 is greater than the height of the worm bar 6 to ensure that the coating material can be completely immersed in the worm bar 6.

[0044] This embodiment is a worm gear coating fixture, such as Figure 6 As shown, a set screw 11 is also included. A support 5 is threaded with the set screw 11, and the end of the set screw 11 is against the end baffle 10 to prevent the worm bar 6 from moving along the axis to affect the quality of the coating.

[0045] This embodiment is a worm gear coating fixture, such as Fig. 9 As shown, it also includes two side baffles 12, on which are respectively processed worm teeth that cooperate with the worm bar 6. The two side baffles 12 are arranged on the base 1. The two side baffles 12 are located on both sides of the worm bar 6 and cooperate with the worm bar 6 so that the teeth on both sides of the worm bar 6 can adhere to the coating and the coating material can be completely immersed in the worm bar 6.

[0046] Optionally, the worm 2 is connected to the support 5 by a positioning pin 13. During the installation of the worm 2, the oil tank pad 3 is accurately positioned on the worm bar 6 so that the coating adheres to the surface of the worm bar 6 to form an oil tank, which plays a role in storing oil and lubricating during operation. Optionally, the thickness of the oil tank pad 3 is 0.2 mm.

[0047] This embodiment is a worm gear coating fixture, such as Figure 5 and Fig. 9As shown, two groups of second pressing blocks 14 are also included, and each group of second pressing blocks 14 is detachably connected to the base 1. Each side baffle 12 is pressed by a group of second pressing blocks 14. Two plates 17 with T-slots can be fixedly set on the base 1, and studs are set in the T-slots. The second pressing blocks 14 are passed through the studs and fastened with nuts to press the second pressing blocks 14 on the side baffles 12.

[0048] This embodiment is a worm gear coating fixture, such as Figure 5 As shown, it also includes two fixing seats 15 and two screws a16. The two fixing seats 15 are respectively arranged on both sides of the base 1. A screw a16 is screwed on the top of each fixing seat 15. The two screws a16 correspond to the positions of the worm 2.

[0049] After the coating is attached to the surface of the worm nut 6, the oil tank pad 3 is stuck on the worm 2, and the worm 2 is fixed by the positioning pin 13, so that the worm 2 is stuck on the two supports 5. For easy disassembly, the screw a16 is screwed outward and pressed against the worm 2 until the worm 2 is separated from the worm nut 6, and then the oil tank pad 3 attached to the worm nut 6 is peeled off to form an oil tank. The fixing seat 15 and the two screws a16 are provided to facilitate the disassembly of the worm 2 and the peeling of the oil tank pad 3.

[0050] In this embodiment, two side baffles 12 and two connecting plates 9 are arranged, and the heights of the two side baffles 12 and the two connecting plates 9 are greater than the height of the worm bar 6, so that the coating material can fully immerse the worm bar 6. At the same time, the worm bar 6 is tightened and fixed by using the set screws 11, screws a16 and two groups of second pressing blocks 14 to prevent axial and radial movement, so that the worm bar 6 and the worm 2 form a certain clearance fit, squeeze out the excess coating material in the tooth groove of the worm bar 6, keep it for a certain time, take out the worm 2, and form a coating with uniform thickness.

[0051] Although the present invention has been described in detail through some specific embodiments, it should be understood by those skilled in the art that the above examples are only for illustration and not for limiting the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A worm gear coating fixture, characterized in that: The invention comprises a base (1), a worm (2), an oil tank pad (3), a set screw (11), two clamping blocks (4), two supports (5), two first pressing blocks (7), a support bar (8), two connecting plates (9), two end baffles (10), two side baffles (12), two groups of second pressing blocks (14), two fixing seats (15) and two screws a (16), wherein the two supports (5) are fixed on the base (1), the worm (2) is placed on the two supports (5), and the two clamping blocks (4) are fixedly connected to the base (1) to press the worm (2) The worm nut (6) is fixedly arranged on the base (1), the worm nut (6) cooperates with the worm (2), and oil groove pads (3) are pasted on both sides of each tooth groove on the worm (2). A plurality of oil groove pads (3) are arranged in a row and are located in the tooth groove of the worm nut (6). When the coating material is poured into the worm nut (6) on the base (1), the coating adheres to the surface of the worm nut (6), and the worm (2) is separated from the worm nut (6), until the worm (2) is separated from the worm nut (6), the oil groove pads (3) attached to the worm nut (6) are peeled off to form an oil groove; Each first pressing block (7) is processed with an arc surface (7-1) that matches the axial surface of the worm (2). Each first pressing block (7) is located between each clamping block (4) and the worm (2). Two support bars (8) are fixed above the base (1). The bottom of the worm bar (6) contacts the two support bars (8). Two connecting plates (9) are processed with worm teeth. Each connecting plate (9) is arranged between each support (5) and the worm bar (6) and is connected to the worm teeth on both sides of the worm bar (6). Each end baffle (10) is arranged between each connecting plate (9) and each support (5). A fixing screw (11) is screwed on a support (5). The end of the fixing screw (11) is pressed against the end baffle (10). Two side baffles (12) are respectively processed with worm teeth that match the worm bar (6). The two side baffles (12) are arranged On the base (1), two side baffles (12) are located on both sides of the worm bar (6) and cooperate with the worm bar (6). Each group of second pressing blocks (14) is detachably connected to the base (1). Each side baffle (12) is pressed by a group of second pressing blocks (14). The heights of the two side baffles (12) and the two connecting plates (9) are greater than the height of the worm bar (6). Two fixing seats (15) are respectively arranged on both sides of the base (1). A screw a (16) is screwed to the top of each fixing seat (15). The two screws a (16) correspond to the positions of the worm (2). The set screws (11), the screws a (16) and the two groups of second pressing blocks (14) are used to tighten and fix the worm bar (6) to prevent the worm bar (6) from moving in its own axial and radial directions, and to form a clearance fit between the worm bar (6) and the worm (2).

2. A worm gear coating fixture according to claim 1, characterized in that: The worm (2) and the support (5) are connected via a positioning pin (13).

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