Special inclined wedge type clamp for clamping lathe for special-shaped parts

Abstract

A positioning mechanism and a clamping mechanism matched with the positioning mechanism are arranged on a flange plate, the clamping mechanism comprises a pressing plate and a pressing claw, the pressing claw is of a wedge structure, the pressing plate is installed on the pressing claw, the pressing plate is of an n-shaped structure, supporting seats are arranged on the front side and the rear side of the pressing claw, and the supporting seats are arranged on the pressing claw. The closed ends of the pressing plates are oppositely arranged and hinged to the supporting seat, rollers are hinged to the open ends of the pressing plates, the rollers are in rolling connection with the wedge faces of the pressing claws, and the open ends of the pressing plates are connected with the flange plate through extension springs. The positioning mechanism comprises a positioning block which is located between the two pressing claws, and a positioning groove is formed in the center of the positioning block and embedded into an installation part. The closed end of the pressing plate presses the part; the positioning block on the flange plate is used for limiting the part, clamping the outline of the part, and the wedge pressing claw is matched with the pressing plate roller, so that the pressing plate swings to press the part to finish machining, accurate positioning is achieved in the machining process, the positioning plane is not deformed after machining, and the part positioning precision is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a special clamp for a special-shaped oblique wedge clamping lathe. Background Art

[0002] At present, in the turning process of special-shaped parts, it is necessary to turn the cylindrical part. The usually adopted method is to locate it based on the local shape contour and the reference plane of the blank.

[0003] The parts are processed by clamping the contour. This positioning and clamping method causes the following defects:

[0004] 1. The positioning method based on the local contour of the blank has a relatively small positioning area and unstable positioning, which leads to a decrease in the precision of the processed parts, deformation of the positioning plane, and poor plane precision;

[0005] 2. The clamping force of the fixture is unevenly distributed, resulting in vibration during part processing and poor part roughness;

[0006] 3. The tool life is short and the equipment operation time is long, which increases production costs; Summary of the invention

[0007] The utility model aims to provide a special clamp for a wedge-shaped clamping lathe for special-shaped parts.

[0008] In order to achieve the above purpose, the technical solution of the utility model is:

[0009] A special clamp for a wedge-shaped clamping lathe for special-shaped parts comprises a flange, on which a positioning mechanism and a clamping mechanism cooperating with the positioning mechanism are provided, and the characteristics are as follows:

[0010] The clamping mechanism includes a pressure plate and a pressure claw. The pressure claw is in an inclined wedge structure. The pressure claw is symmetrically fixed on the flange. The pressure plate is symmetrically installed on the pressure claw. The pressure plate is in an n-shaped structure. Two support seats are provided on the front and rear sides of each pressure claw. The closed ends of the pressure plate are arranged opposite to each other and hinged to the support seats. The open end of the pressure plate is hinged with a roller. The roller is rollingly connected to the inclined wedge surface of the pressure claw. The open end of the pressure plate is connected to the flange through a tension spring. The positioning mechanism includes a positioning block. The positioning block is located between the two pressure claws. A positioning groove is provided in the center of the positioning block. The positioning groove is embedded with a mounting part. The closed end of the pressure plate presses the part.

[0011] Furthermore, the opening end of the pressure plate is provided with two wheel grooves, each wheel groove is provided with a roller, and the roller and the pin hole of the wheel groove are hinged by a first shaft pin penetrating front and back.

[0012] Furthermore, one end of the tension spring is sleeved on the outer end of the first shaft pin, and the other end of the tension spring is fixedly connected to the flange.

[0013] Furthermore, the pressing claw comprises a pressing claw base, and two inclined panels are provided on the front and rear sides of the pressing claw base. The upper ends of the inclined panels are in an inclined wedge structure, and the two rollers roll along the upper ends of the two inclined panels respectively.

[0014] Furthermore, the outer periphery of the positioning block is connected to the flange through hexagon socket bolts.

[0015] Furthermore, a compression spring and an elastic pin are provided at the upper end of the positioning groove, and the lower end of the part is movably connected to the positioning groove through the cooperation of the compression spring and the elastic pin.

[0016] Furthermore, a ring-shaped connecting piece is provided on one side of the support seat close to the pressing claw, and the connecting piece is hinged to the pin hole at the closed end of the pressing plate through a second shaft pin penetrating front and back.

[0017] Furthermore, the outer periphery of the support seat is connected to the flange by means of hexagon socket bolts.

[0018] The utility model limits the parts by the positioning block on the flange, clamps the outer contour of the parts, and the inclined wedge pressure claw cooperates with the pressure plate roller to make the pressure plate swing and press the parts to complete the processing. The processing process is accurately positioned, and the positioning plane is not deformed after processing, which effectively improves the positioning accuracy of the parts. The utility model also reduces vibration by connecting the pressure plate through the flange spring, thereby increasing the service life of the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a side structural sectional view of the utility model;

[0021] Figure 3 This is a structural schematic diagram of the positioning block of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the pressing plate of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the pressure claw of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the support seat of the utility model.

[0025] Reference numerals:

[0026] 1 flange, 2 positioning block, 3 pressure plate, 4 pressure claw, 5 support seat,

[0027] 6 connecting piece, 7 first axle pin, 8 wheel groove, 9 roller, 10 tension spring,

[0028] 11: pressure claw base, 12: inclined plate, 13: positioning groove, 14: compression spring,

[0029] 15 elastic pin, 16 second shaft pin, 17 parts, 18 hexagon socket bolt,

[0030] 121 is an upper inclined surface, 122 is a transition plane, and 123 is a lower inclined surface. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The utility model discloses a special clamp for a special-shaped part inclined wedge clamping lathe, comprising a flange 1, on which a positioning mechanism and a clamping mechanism cooperating with the positioning mechanism are arranged. Figure 1 As shown, the clamping mechanism includes a pressure plate 3 and a pressure claw 4. The pressure claw 4 is an inclined wedge structure. The pressure claw 4 is fixed on the flange 1 symmetrically. The pressure plate 3 is installed on the pressure claw 4 symmetrically. The pressure plate 3 is an n-type structure.

[0033] Two support seats 5 are provided on the front and rear sides of each pressing claw 4. The outer periphery of the support seat 5 is connected to the flange 1 through the hexagon socket bolts 18. The closed ends of the pressing plate 3 are arranged facing each other and hinged to the support seat 5. Specifically, Figure 6 As shown, a ring-shaped connecting piece 6 is provided on one side of the support seat 5 close to the pressing claw 4, and the connecting piece 6 is hinged to the pin hole at the closed end of the pressing plate 3 through a second shaft pin 16 that penetrates front and back.

[0034] like Figure 1 As shown, the open end of the pressing plate 3 is hinged with a roller 9, and the roller 9 is rollingly connected with the inclined wedge surface of the pressing claw 4. Specifically, as shown in Figure 5 As shown, the pressure claw 4 includes a pressure claw base 11, and two inclined panels 12 are provided on the front and rear sides of the pressure claw base 11. The upper end of the inclined panel 12 is an inclined wedge surface, which includes an upper inclined surface 121, a transition plane 122 and a lower inclined surface 123 arranged in sequence. The two rollers 9 roll along the inclined wedge surfaces of the two inclined panels 12 respectively.

[0035] The open end of the pressure plate 3 is connected to the flange 1 through a tension spring 10. The positioning mechanism includes a positioning block 2, which is located between the two pressure claws 4. Specifically, Figure 4As shown, the open end of the pressure plate 3 is provided with two wheel grooves 8, each wheel groove 8 is provided with a roller 9, the roller 9 and the pin hole of the wheel groove 8 are hinged by a first axial pin 7 passing through the front and back, one end of the tension spring 10 is sleeved on the outer end of the first axial pin 7, and the other end of the tension spring 10 is fixedly connected to the flange 1.

[0036] like Figure 3 As shown, a positioning groove 13 is provided in the center of the positioning block 2. The shape of the positioning groove 13 matches the size of the part 17 so that the part 17 can be embedded in the positioning groove 13 for positioning. The outer periphery of the positioning block 2 is connected to the flange 1 by a hexagon socket bolt 18. Figure 2 As shown, a compression spring 14 and an elastic pin 15 are provided at the upper end of the positioning groove 13, and the lower end of the part 17 is movably connected to the positioning groove 13 through the compression spring 14 and the elastic pin 15, and the closed end of the pressure plate 3 presses the part 17 into the positioning groove 13.

[0037] When in use, start the hydraulic clamping device of the machine tool spindle. Under the action of the hydraulic clamping force, the support seat 5 gradually moves downward, driving the roller 9 of the pressure plate 3 to roll downward on the inclined wedge surface of the pressure claw 4 to the transition plane 122 of the inclined wedge surface, driving the closed end of the pressure plate 3 to turn down and fit evenly on the surface of the part 17, and completely fit the positioning surface of the lower end of the part 17 with the positioning groove 13 in the positioning block 2 to achieve precise positioning. The positioning groove 13 is provided with an inner contour consistent with the design requirements of the outer contour of the part 17, which helps to improve the processing accuracy of the part 17.

[0038] When the part 17 needs to be taken out, the part 17 is pressed downward, and the elastic pin 15 can push the part 17 out under the action of the compression spring 14, thereby improving the material taking efficiency.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A special clamp for a wedge-shaped clamping lathe for special-shaped parts, comprising a flange, a positioning mechanism and a clamping mechanism cooperating with the positioning mechanism, characterized in that: The clamping mechanism includes a pressure plate and a pressure claw. The pressure claw is in an inclined wedge structure. The pressure claw is symmetrically fixed on the flange. The pressure plate is symmetrically installed on the pressure claw. The pressure plate is in an n-shaped structure. Two support seats are provided on the front and rear sides of each pressure claw. The closed ends of the pressure plate are arranged opposite to each other and hinged to the support seats. The open end of the pressure plate is hinged with a roller. The roller is rollingly connected to the inclined wedge surface of the pressure claw. The open end of the pressure plate is connected to the flange through a tension spring. The positioning mechanism includes a positioning block. The positioning block is located between the two pressure claws. A positioning groove is provided in the center of the positioning block. The positioning groove is embedded with a mounting part. The closed end of the pressure plate presses the part.

2. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 1 is characterized in that: The opening end of the pressure plate is provided with two wheel grooves, each wheel groove is provided with a roller, and the roller and the pin hole of the wheel groove are hingedly connected by a first shaft pin penetrating front and back.

3. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 2 is characterized in that: One end of the tension spring is sleeved on the outer end of the first shaft pin, and the other end of the tension spring is fixedly connected to the flange.

4. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 2 is characterized in that: The pressing claw comprises a pressing claw base, and two inclined panels are arranged on the front and rear sides of the pressing claw base. The upper ends of the inclined panels are in an inclined wedge structure, and two rollers roll along the upper ends of the two inclined panels respectively.

5. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 1 is characterized in that: The outer periphery of the positioning block is connected to the flange through hexagon socket bolts.

6. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 5 is characterized in that: The upper end of the positioning groove is provided with a compression spring and an elastic pin, and the lower end of the part is movably connected with the positioning groove through the cooperation of the compression spring and the elastic pin.

7. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 1 is characterized in that: A ring-shaped connecting piece is provided on one side of the support seat close to the pressing claw, and the connecting piece is hinged to the pin hole at the closed end of the pressing plate through a second shaft pin that runs through the front and back.

8. The special clamp for the special-shaped wedge-shaped clamping lathe according to claim 1 is characterized in that: The outer periphery of the support seat is connected to the flange through hexagon socket bolts.

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