Tool clamp for machining tilting-type fan-shaped parts

Abstract

The utility model relates to a tool clamp for machining tilting-type fan-shaped parts. The tool clamp used for machining the tilting-type fan-shaped part comprises a mandrel body, a plurality of clamping pieces, a plurality of clamping pieces, a plurality of clamping pieces, a plurality of clamping pieces, a plurality of clamping pieces and a plurality of clamping pieces, the positioning pins are arranged in the circumferential direction of the step surface at intervals, and the positioning pins are used for being matched with positioning holes of the tilting-type fan-shaped part; the positioning wedge blocks are arranged at intervals in the circumferential direction of the step surface, and every two adjacent positioning wedge blocks are jointly used for positioning one tilting-type fan-shaped part; the mandrel body is sleeved with the pressing plate, and the pressing plate is used for pressing the tilting-type fan-shaped part. The utility model solves the problems that the tiltable fan-shaped sliding bearing parts are difficult to clamp during turning or grinding, and the product precision and quality are influenced due to clamping deformation in the turning or grinding process of the tiltable fan-shaped sliding bearing parts.

Description

Technical Field

[0001] The utility model relates to the technical field of machining of tilting sector parts of sliding bearings, and particularly relates to a fixture for machining tilting sector parts. Background Art

[0002] In shipbuilding and related fields, sliding bearings are important parts that support rotating machinery and reduce the friction coefficient during their movement. Especially in key parts such as ship engines and transmission systems, the performance and accuracy of sliding bearings have a decisive impact on the operation efficiency and safety stability of the whole ship.

[0003] Among them, as Figure 1 and Figure 2 shown, it is a kind of marine tilting sector sliding bearing part. Its design feature is that the wall thickness at the thickest part is only H±0.005mm, and there is an eccentricity of L±0.004mm between the inner hole and the outer circle. Such a design, although improving the bearing capacity and stability of the bearing, also puts forward higher requirements for machining accuracy at the same time.

[0004] During the machining process, the angles of the sector surfaces (such as 24° and 36°) need to be aligned with the center of the inner hole as the reference to ensure the precise assembly and stable operation of the parts. However, due to the particularity of the sector parts, there are many difficulties in clamping and machining using conventional machining methods. Although the machining scheme of clamping single-piece sector parts is feasible, it is very difficult to machine the outer circle surfaces of multiple parts simultaneously. Especially for a set of four pieces of tiles used in pairs, it is very difficult to ensure the dimensional consistency and stability.

[0005] Therefore, aiming at the machining problem of marine tilting sector sliding bearing parts, a new type of high-precision and high-efficiency fixture is urgently needed. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a fixture for machining tilting sector parts, so as to solve the problems of difficult clamping during turning or grinding of tilting sector sliding bearing parts, as well as the problem of clamping-induced deformation, which affects the product accuracy and quality.

[0007] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0008] A fixture for machining tilting sector parts, comprising:

[0009] A mandrel body, which has a stepped surface for cooperating and positioning with the tilting sector part;

[0010] Positioning pins, which are arranged at intervals along the circumferential direction of the stepped surface, and the positioning pins are used for cooperating with the positioning holes of the tilting sector part;

[0011] Positioning wedges are arranged at intervals along the circumferential direction of the stepped surface, and two adjacent positioning wedges are jointly used to position a tiltable sector part.

[0012] A pressing plate is sleeved on the mandrel body and is used to press the tiltable sector part.

[0013] According to the above technical means, by forming a stepped surface on the mandrel body and arranging a pressing plate so that the tiltable sector part is located between the stepped surface and the pressing plate, and the tiltable sector part is in surface contact with both the stepped interface and the pressing plate, the clamping of the tiltable sector part is effectively realized, and the problem of clamping deformation caused by a small clamping contact surface is avoided. At the same time, by arranging positioning pins and positioning wedges on the stepped surface to realize double positioning of the tiltable sector part, the positioning accuracy of the tiltable sector part is ensured, and further the machining quality, accuracy and efficiency of the tiltable sector part are ensured. It effectively solves the problems of difficult clamping in turning or grinding of tiltable sector sliding bearing parts, as well as the problem of clamping deformation affecting the product accuracy and quality.

[0014] Preferably, the positioning wedge is of a sector structure, and the positioning wedge is in surface contact with the tiltable sector part.

[0015] By setting the positioning wedge into a sector structure, the positioning wedge is in surface contact with the tiltable sector part, improving the reliability and positioning accuracy of the positioning of the tiltable sector part.

[0016] Preferably, the positioning wedge is assembled and fixed on the mandrel body through a connecting piece.

[0017] By using a connecting piece to assemble and fix the positioning wedge on the mandrel body, the stability of the assembly of the positioning wedge is effectively ensured, thereby ensuring the positioning accuracy of the positioning wedge for the tiltable sector part.

[0018] Preferably, the connecting piece is a hexagon socket head cap screw.

[0019] Preferably, the fixture further includes a cylindrical pin, and the positioning wedge is positioned on the mandrel body through the cylindrical pin.

[0020] By arranging the cylindrical pin to position the positioning wedge on the mandrel body, the positioning accuracy of the positioning wedge is effectively ensured.

[0021] Preferably, four positioning pins are arranged at intervals along the circumferential direction of the stepped surface to simultaneously realize the positioning and machining of four tiltable sector parts.

[0022] By arranging four positioning pins at intervals along the circumferential direction on the step surface, the fixture can achieve the positioning and machining of up to four tilting sector parts simultaneously, effectively ensuring the machining efficiency and accuracy. Especially for a set of four tiles used in pairs, it can effectively ensure the dimensional consistency and stability.

[0023] Preferably, four of the positioning wedges are arranged at intervals along the circumferential direction on the step surface to simultaneously achieve the positioning and machining of four tilting sector parts.

[0024] By arranging four positioning wedges at intervals along the circumferential direction on the step surface, the fixture can achieve the positioning and machining of up to four tilting sector parts simultaneously, effectively ensuring the machining efficiency and accuracy. Especially for a set of four tiles used in pairs, it can effectively ensure the dimensional consistency and stability.

[0025] Preferably, a fastener is also provided at the outer end of the mandrel body close to the pressing plate, and the pressing plate is locked and fixed by screwing the fastener.

[0026] By providing a fastener at the outer end of the mandrel body close to the pressing plate, the pressing plate is locked and fixed by screwing the fastener, so that the pressing plate presses and fixes the tilting sector part, further ensuring the stability of the tilting sector part during machining.

[0027] Preferably, the fastener is a hexagonal nut.

[0028] Preferably, central holes are provided at both ends of the mandrel body.

[0029] By providing central holes at both ends of the mandrel body, which are used to cooperate with the center holes of the machine tool spindle tip and the tailstock tip, the fixture is effectively fixed.

[0030] Advantages of the present utility model:

[0031] The fixture for machining eccentric notch sleeve parts of the present utility model forms a step surface on the mandrel body, and a pressing plate is provided so that the tilting sector part is located between the step surface and the pressing plate, and the tilting sector part is in surface contact with both the table interface and the pressing plate, effectively realizing the clamping of the tilting sector part and avoiding the problem of clamping deformation caused by a small clamping contact surface. At the same time, by providing positioning pins and positioning wedges on the step surface to achieve double positioning of the tilting sector part, the positioning accuracy of the tilting sector part is ensured, and further the machining quality, accuracy and efficiency of the tilting sector part are ensured. Moreover, it has the advantages of simple structure, convenient clamping, simplicity and low manufacturing cost, and has the value of popularization and application in the machining technology field of sliding bearing tilting sector parts. Description of the Drawings

[0032] Figure 1 Schematic structural diagram of a tiltable sector part;

[0033] Figure 2 Schematic cross-sectional view of a tiltable sector part;

[0034] Figure 3 Schematic structural diagram of the present utility model;

[0035] Figure 4 is Figure 3 Cross-sectional view along A-A in

[0036] Figure 5 is Figure 3 right view of

[0037] Figure 6 Schematic structural diagram of the assembly of a tooling fixture and a tiltable sector part;

[0038] Figure 7 Schematic structural diagram of a positioning wedge block;

[0039] Figure 8 is Figure 7 Cross-sectional view along B-B in

[0040] Figure 9 is Figure 7 Cross-sectional view along C-C in

[0041] Wherein, 1 - mandrel body, 11 - stepped surface; 2 - positioning pin; 3 - positioning wedge block, 31 - first mounting hole, 32 - second mounting hole; 4 - pressing plate; 5 - connecting piece; 6 - cylindrical pin; 7 - fastener; 8 - tiltable sector part. Specific embodiments

[0042] The following will describe the embodiments of the present utility model with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for illustrating the present utility model, rather than for limiting the protection scope of the present utility model.

[0043] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. Embodiment

[0044] As shown in Figures 1 to 9 Figure 5, a fixture for machining tiltable fan-shaped parts includes:

[0045] A mandrel body 1, the mandrel body 1 having a stepped surface 11 for positioning and mating with the tiltable fan-shaped part 8;

[0046] Positioning pins 2, the positioning pins 2 being arranged at intervals along the circumferential direction of the stepped surface 11, and the positioning pins 2 being used for mating with the positioning holes of the tiltable fan-shaped part 8;

[0047] Positioning wedges 3, the positioning wedges 3 being arranged at intervals along the circumferential direction of the stepped surface 11, and two adjacent positioning wedges 3 together being used for positioning one tiltable fan-shaped part 8;

[0048] A pressing plate 4, the pressing plate 4 being sleeved on the mandrel body 1 and used for pressing the tiltable fan-shaped part 8.

[0049] By forming a stepped surface on the mandrel body and providing a pressing plate such that the tiltable fan-shaped part is located between the stepped surface and the pressing plate, and the tiltable fan-shaped part is in surface contact with both the stepped interface and the pressing plate, the clamping of the tiltable fan-shaped part is effectively realized, and the problem of clamping and deformation caused by a small clamping contact surface is avoided. At the same time, by providing positioning pins and positioning wedges on the stepped surface to achieve double positioning of the tiltable fan-shaped part, the positioning accuracy of the tiltable fan-shaped part is ensured, and thus the machining quality, accuracy and efficiency of the tiltable fan-shaped part are ensured.

[0050] Exemplarily, the stepped surface 11 of the mandrel body 1 is formed along the circumferential direction of the mandrel body 1, and mounting holes for mounting the positioning pins 2 are provided along the axial direction on the stepped surface 11.

[0051] In some embodiments, in order to improve the reliability and positioning accuracy of the positioning of the tiltable fan-shaped part, the positioning wedge 3 is designed as a fan-shaped structure such that the positioning wedge 3 is in surface contact with the tiltable fan-shaped part 8, thereby increasing the contact area.

[0052] In some embodiments, in order to ensure the stability of the assembly of the positioning wedge, a connecting member 5 is used to assemble and fix the positioning wedge 3 on the mandrel body 1.

[0053] Exemplarily, connecting member mounting holes for mounting the connecting member 5 are provided along the axial direction on the stepped surface 11, and first mounting holes 31 are provided at corresponding positions on the positioning wedge 3, so that the positioning wedge is assembled and fixed on the mandrel body through the connecting member 5 passing through the connecting member mounting holes and the first mounting holes 31 at the same time.

[0054] Exemplarily, the connecting member 5 is a hexagon socket head cap screw. The connecting member 5 can also be selected as a combination of a bolt and a nut, a pin or a rivet.

[0055] In some embodiments, in order to ensure the positioning accuracy of the positioning wedge block, and thus ensure the positioning accuracy and machining accuracy of the tiltable sector-shaped part, the tooling fixture further includes a cylindrical pin 6, so as to position the positioning wedge block 3 on the mandrel body 1 through the cylindrical pin 6.

[0056] Exemplarily, a cylindrical pin mounting hole for the cylindrical pin 6 is further provided on the stepped surface 11 of the mandrel body 1 along the axial direction, and a second mounting hole 32 is provided at the corresponding position on the positioning wedge block 3, so as to realize positioning of the positioning wedge block 3 on the mandrel body 1 by passing the cylindrical pin 6 through the cylindrical pin mounting hole and the second mounting hole 32 at the same time.

[0057] In some embodiments, in order to machine multiple tiltable sector-shaped parts to improve the machining efficiency and machining accuracy, four positioning pins 2 are arranged at intervals along the circumferential direction of the stepped surface 11 to simultaneously realize the positioning and machining of four tiltable sector-shaped parts 8. Among them, the four positioning pins 2 are arranged at equal intervals along the circumferential direction of the stepped surface 11. Each positioning pin 2 corresponds to positioning one tiltable sector-shaped part 8.

[0058] Especially for a set of four tiles used in pairs, during machining, the tooling fixture can simultaneously realize the positioning and machining of four tiltable sector-shaped parts 8, greatly improving the dimensional consistency and stability of the four tiltable sector-shaped parts. During actual use, it is also possible to realize the clamping and fixing of single, two, and three tiltable sector-shaped parts, and can be flexibly adjusted according to actual needs.

[0059] In some embodiments, in order to machine multiple tiltable sector-shaped parts to improve the machining efficiency and machining accuracy, four positioning wedge blocks 3 are arranged at intervals along the circumferential direction of the stepped surface 11 to simultaneously realize the positioning and machining of four tiltable sector-shaped parts 8. Among them, the four positioning wedge blocks 3 are arranged at equal intervals along the circumferential direction of the stepped surface 11. Every two positioning wedge blocks 3 jointly correspond to positioning one tiltable sector-shaped part 8.

[0060] Especially for a set of four tiles used in pairs, during machining, the tooling fixture can simultaneously realize the positioning and machining of four tiltable sector-shaped parts 8, greatly improving the dimensional consistency and stability of the four tiltable sector-shaped parts. During actual use, it is also possible to realize the clamping and fixing of single, two, and three tiltable sector-shaped parts, and can be flexibly adjusted according to actual needs.

[0061] Among them, each positioning pin 2 is arranged at a position between two adjacent positioning wedge blocks 3.

[0062] In some embodiments, in order to further ensure the stability of the tiltable sector-shaped part during machining, a fastener 7 is provided at the outer end of the mandrel body 1 close to the pressing plate 4, so as to realize the locking and fixing of the pressing plate 4 by screwing the fastener 7.

[0063] Exemplarily, the fastener 7 is a hexagon nut. The hexagon nut can also be replaced by a rivet nut.

[0064] In some embodiments, central holes are provided at both ends of the mandrel body 1. The two central holes are respectively used for mating with the center holes of the headstock center and the tailstock center of the machine tool to fix the fixture.

[0065] In the actual use process of the fixture in the above embodiments, first, the positioning pin 2 is inserted into the mounting hole on the step surface 11 of the mandrel body 1. The positioning wedge block 3 is positioned on the step surface 11 of the mandrel body 1 through the cylindrical pin 6. The tiltable sector-shaped part 8 to be machined is placed between two adjacent positioning wedge blocks 3. Up to four tiltable sector-shaped parts 8 to be machined can be placed. The positioning wedge block 3 is fixed on the step surface 11 of the mandrel body 1 through the connecting piece 5. The pressing plate 4 and the fastener 7 are sequentially inserted through the end of the mandrel body 1 away from the step surface 11, so that the pressing plate 4 presses the tiltable sector-shaped part 8 to be machined. By screwing the fastener 7, the pressing plate 4 presses and fixes the tiltable sector-shaped part 8 to be machined. Then, through the cooperation of the central holes at both ends of the mandrel body 1 with the center holes of the headstock center and the tailstock center of the machine tool, the fixture and the tiltable sector-shaped part 8 to be machined are installed on the machine tool together. Subsequently, the outer circular surface of the tiltable sector-shaped part 8 to be machined is machined.

[0066] In summary, for the fixture for machining eccentric notch sleeve parts of the present invention, by forming a step surface on the mandrel body and setting a pressing plate so that the tiltable sector-shaped part is located between the step surface and the pressing plate, and the tiltable sector-shaped part is in surface contact with both the step interface and the pressing plate, the clamping of the tiltable sector-shaped part is effectively realized, and the problem of clamping deformation caused by a small clamping contact surface is avoided. At the same time, by setting a positioning pin and a positioning wedge block on the step surface to achieve double positioning of the tiltable sector-shaped part, the positioning accuracy of the tiltable sector-shaped part is guaranteed, and further the machining quality, accuracy and efficiency of the tiltable sector-shaped part are guaranteed. And it has the advantages of simple structure, convenient clamping, simple and easy operation and low manufacturing cost, and has the value of popularization and application in the machining technology field of tiltable sector-shaped parts of sliding bearings.

[0067] The above embodiments are only the preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A fixture for machining tiltable fan-shaped parts, characterized in that: include: A spindle body (1), the spindle body (1) having a step surface (11) for cooperating with a tiltable fan-shaped part (8) for positioning; Positioning pins (2), the positioning pins (2) being arranged at intervals along the circumferential direction of the step surface (11), the positioning pins (2) being used to cooperate with positioning holes of the tiltable sector-shaped part (8); Positioning wedges (3), the positioning wedges (3) being arranged at intervals along the circumferential direction of the step surface (11), and two adjacent positioning wedges (3) being used together to position a tiltable sector-shaped part (8); A pressure plate (4), the pressure plate (4) being sleeved on the spindle body (1) and being used for pressing the tiltable fan-shaped part (8).

2. The fixture for machining tiltable fan-shaped parts according to claim 1 is characterized in that: The positioning wedge block (3) is of a fan-shaped structure, and the positioning wedge block (3) is in surface contact with the tiltable fan-shaped part (8).

3. The fixture for machining tiltable fan-shaped parts according to claim 1, characterized in that: The positioning wedge (3) is assembled and fixed on the spindle body (1) via a connecting piece (5).

4. The fixture for machining tiltable fan-shaped parts according to claim 3 is characterized in that: The connecting piece (5) is a cylindrical head hexagon socket screw.

5. The fixture for machining tiltable fan-shaped parts according to claim 1, characterized in that: The fixture also includes a cylindrical pin (6), through which the positioning wedge block (3) is positioned on the spindle body (1).

6. The fixture for machining tiltable fan-shaped parts according to claim 1, characterized in that: The step surface (11) has four positioning pins (2) arranged at intervals along the circumferential direction, so as to simultaneously realize the positioning and processing of four tiltable sector-shaped parts (8).

7. The fixture for machining tiltable fan-shaped parts according to claim 1, characterized in that: The step surface (11) is provided with four positioning wedges (3) arranged at intervals along the circumferential direction, so as to realize the positioning and processing of four tiltable sector-shaped parts (8) at the same time.

8. The fixture for machining tiltable fan-shaped parts according to claim 1, characterized in that: A fastener (7) is also provided at the outer end of the spindle body (1) close to the pressing plate (4), and the pressing plate (4) is locked and fixed by screwing the fastener (7).

9. The fixture for machining tiltable fan-shaped parts according to claim 8, characterized in that: The fastener (7) is a hexagonal nut.

10. The fixture for machining tiltable fan-shaped parts according to claim 1, characterized in that: Both ends of the spindle body (1) are provided with central holes.

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