Special-shaped crankshaft high-precision machining tool

Abstract

The utility model relates to the technical field of machining tools, in particular to a special-shaped crankshaft high-precision machining tool which comprises two oppositely-arranged self-centering chucks and a plurality of supporting tables between the two self-centering chucks, movable clamping jaws with steps are arranged in the self-centering chucks, and V-shaped supporting heads with upward openings are arranged at the tops of the supporting tables. The self-centering chuck and the supporting table are respectively connected with the same set of linear sliding rails arranged below the self-centering chuck and the supporting table through a sliding frame and a sliding table; a laser positioning assembly is arranged on the sliding frame, the supporting table comprises a fixed table on the lower portion and a lifting table on the upper portion, and a pressure sensing device is arranged in the lifting table; the special-shaped crankshaft adjusting device is high in adjusting flexibility, can adapt to special-shaped crankshafts with variable shapes, and is wide in universality; the chattering phenomenon during part machining can be obviously weakened, and the surface quality and the machining precision of the crankshaft are improved; and the laser positioning assembly is arranged, so that the central axes of the two opposite self-centering chucks are accurately overlapped, and accurate clamping of the special-shaped crankshaft is further achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to processing frock technical field especially a kind of special-shaped crankshaft high-precision processing frock. BACKGROUND

[0002] The role of crankshaft is to change the reciprocating linear motion of piston into rotary motion, with the continuous development of industrial technology, various special-shaped crankshaft design emerge in endlessly. Frock design is the key link in crankshaft processing, ingenious design not only can improve processing efficiency, but also can guarantee crankshaft precision, special-shaped crankshaft due to its unique shape structure, for example, irregular crank distribution, non-standard journal size and special eccentric design, etc., so that traditional processing frock is difficult to meet its high-precision, high-efficiency processing demand, greatly improve the production difficulty, increase production cost. SUMMARY

[0003] The utility model discloses a kind of special-shaped crankshaft high-precision processing frock, can promote processing precision and quality.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0005] A kind of special-shaped crankshaft high-precision processing frock, including two opposite self-centering chuck and several supporting tables between them, the movable clamp jaw with step is provided in the self-centering chuck, the top of the supporting table is provided with V-shaped support head with open upward;

[0006] The self-centering chuck and supporting table are connected by slide and slide table respectively, and a same set of linear slide rails is arranged below them;

[0007] Laser positioning assembly is arranged on the slide, and the supporting table includes fixed table below and lifting table above, and pressure sensing device is arranged in the lifting table.

[0008] Further, 6 movable clamping blocks with equal angle are arranged in the self-centering chuck, the movable clamping blocks are connected with movable clamp jaw through shaft at similar center end, and the step is arranged in the inner periphery of movable clamp jaw.

[0009] Further, the slide includes horizontal sliding module one, vertical connecting longitudinal sliding module is arranged on the horizontal sliding module one, the longitudinal sliding module is vertically connected with horizontal sliding module two, and the horizontal sliding module two is connected with disc seat for fixing self-centering chuck.

[0010] Further, the laser positioning assembly includes laser emitting unit and laser receiving unit in counter fitting, two units are respectively mounted on two disc seats arranged in opposite, and the laser positioning assembly is arranged around the periphery of self-centering chuck.

[0011] Further, the sliding table comprises a bottommost horizontal sliding module three, and the movable part on the horizontal sliding module three is connected with a fixed table.

[0012] Further, the horizontal sliding module one, the horizontal sliding module two and the horizontal sliding module three are arranged in parallel.

[0013] Further, the horizontal positions and the heights of the centering chuck and the V-shaped supporting head are independently variable.

[0014] Further, the number of the supporting tables is greater than or equal to 2.

[0015] Further, the measuring direction of the pressure sensing device is a vertical direction.

[0016] Further, the movable clamping jaw is a'( )'shape, and the opening thereof faces the central axis of the centering chuck.

[0017] The beneficial effects of the technical scheme of the utility model are as follows:

[0018] 1: The special-shaped crankshaft high-precision machining tool has high flexibility of the inner clamping piece adjustment, can adapt to the special-shaped crankshafts with variable shapes, and has wide universality.

[0019] 2: The special-shaped crankshaft high-precision machining tool is provided with a V-shaped supporting head for lifting the journal part of the crankshaft, significantly reduces the vibration phenomenon during machining of the part, and the supporting tables are equal in the supporting force on the upper crankshaft, so that the surface quality and machining precision of the crankshaft are improved.

[0020] 3: The special-shaped crankshaft high-precision machining tool is provided with a laser positioning assembly to make the central axes of the two opposite centering chucks accurately coincide, so that the special-shaped crankshaft is accurately clamped. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the drawings without creative labor.

[0022] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0023] Figure 2 It is Figure 1 It is an enlarged schematic view of position A in the figure;

[0024] Figure 3 It is Figure 1 It is an enlarged schematic view of position B in the figure;

[0025] Figure 4 It is the front view structure schematic diagram of the utility model;

[0026] Figure 5 It is the plan structure schematic diagram of the utility model;

[0027] Figure 6 It is the connection schematic diagram of the movable clamping block and movable clamping jaw in the utility model;

[0028] Mark in the drawing: 1, self-centering chuck;1a, movable clamping jaw;1b, movable clamping block;1c, rotating shaft;2, support platform;2a, V-shaped support head;2b, fixed platform;2c, lifting platform;3, sliding frame;3a, horizontal sliding module one;3b, vertical sliding module;3c, horizontal sliding module two;3d, disc seat;4, sliding platform;4a, horizontal sliding module three;5, linear slide rail;6, laser positioning assembly;6a, laser emission unit;6b, laser receiving unit;7, pressure sensing device. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in combination with the drawings. A kind of special-shaped crankshaft high-precision machining tool, as shown in Fig. Figures 1-6 It includes two opposite self-centering chucks 1 and ≥2 support platforms 2 between them, the movable clamping jaw 1a with step is arranged in the self-centering chuck 1, the top of the support platform 2 is provided with the V-shaped support head 2a with open upward, and the V-shaped support head 2a is used to lift the journal portion in the middle of crankshaft, significantly weaken the vibration phenomenon when part is processed, improve surface quality and machining precision.

[0030] The self-centering chuck 1 and support platform 2 are connected by sliding frame 3 and sliding platform 4 respectively, and the same linear slide rail 5 is arranged below them;Two self-centering chucks 1 are used to clamp the two ends of special-shaped crankshaft respectively, so that the two self-centering chucks 1 with variable spacing can adapt to special-shaped crankshafts of different lengths, and have wide versatility.

[0031] Specifically, to adapt to the special-shaped crankshaft with variable shape, the sliding frame 3 includes horizontal sliding module one 3a, the vertical sliding module 3b is vertically connected to the horizontal sliding module one 3a, the vertical sliding module 3b is vertically connected to the horizontal sliding module two 3c, the disc seat 3d for fixing the self-centering chuck 1 is connected to the horizontal sliding module two 3c, the support platform 2 includes the fixed platform 2b below and the lifting platform 2c above, the sliding platform 4 includes the horizontal sliding module three 4a at the bottom, the horizontal sliding module one 3a, the horizontal sliding module two 3c and the horizontal sliding module three 4a are arranged in parallel, and the movable part on the horizontal sliding module three 4a is connected to the fixed platform 2b, so that the horizontal position and height of the self-centering chuck 1 and the V-shaped support head 2a are independently variable, and the adjustment flexibility is high.

[0032] In order to make the two self-centering chucks 1 accurate in position after position adjustment, the laser positioning assembly 6 is arranged on the slide 3, preferably three groups, the laser positioning assembly 6 comprises a laser emitting unit 6a and a laser receiving unit 6b matched, the two units are respectively installed on the two disc seats 3d arranged opposite, the laser positioning assembly 6 is arranged around the periphery of the self-centering chuck 1, the axes of the two self-centering chucks 1 are coincided through the opposite matching of each group of laser emitting unit 6a and laser receiving unit 6b, and the special-shaped crankshaft is accurately clamped.

[0033] In order to make the supporting table 2 support the upper crankshaft with equal force and high clamping accuracy, the pressure sensing device 7 is arranged in the lifting table 2c, the measuring direction of the pressure sensing device 7 is the vertical direction, the lifting table 2c is divided into two sections, when the crankshaft is supported, the lifting of the lifting table 2c is adjusted according to the values of the pressure sensing devices 7 until the values measured by all the pressure sensing devices 7 are equal.

[0034] Further optimization scheme, the self-centering chuck 1 is provided with six movable clamping blocks 1b with equal angles and uniformly distributed, the six-direction clamping force is uniform, the similar center end of the movable clamping block 1b is connected with the movable clamping jaw 1a through the rotating shaft 1c, the movable clamping jaw 1a is shaped as (, the opening of which faces the center of the self-centering chuck 1, the step is arranged on the inner periphery of the movable clamping jaw 1a, and is adapted to the step shaft at the two ends of the crankshaft, so that the contact area between the two ends of the crankshaft and the clamp is increased, and the clamping force is improved, thereby ensuring the machining accuracy.

[0035] According to the above scheme, the technical scheme of the utility model realizes high-precision clamping of the special-shaped crankshaft, the clamping force at each point is uniform, the adjustment flexibility is high, the special-shaped crankshaft with variable shapes is adapted, the error caused by manual alignment is reduced, and the crankshaft machining efficiency is improved.

[0036] The above embodiment according to the utility model is an inspiration, through the above description, the related technical personnel can make various changes and modifications without deviating from the technical idea of the utility model. Any modification, equivalent replacement, improvement and the like within the spirit and principles of the present application shall be included in the protection scope of the present application. The technical scope of the utility model is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A high-precision processing tool for a profiled crankshaft, characterized in that: It comprises two self-centering chucks (1) arranged oppositely and a plurality of supporting tables (2) between the two self-centering chucks (1), wherein the self-centering chucks (1) are provided with movable clamping jaws (1a) with steps, and the top of the supporting tables (2) is provided with V-shaped supporting heads (2a) open upwardly; The self-centering chucks (1) and the supporting tables (2) are connected by a slide (3) and a slide table (4) respectively, and a same set of linear slide rails (5) arranged below the two is provided; The slide (3) is provided with a laser positioning assembly (6), and the supporting table (2) comprises a fixed table (2b) below and a lifting table (2c) above, and the lifting table (2c) is provided with a pressure sensing device (7).

2. The high-precision machining tool for a profiled crankshaft according to claim 1, characterized in that: The self-centering chuck (1) is provided with six movable clamping blocks (1b) with equal angles and uniformly distributed, the similar central ends of the movable clamping blocks (1b) are connected with the movable clamping jaw (1a) through a rotating shaft (1c), and the step is arranged in the inner periphery of the movable clamping jaw (1a).

3. The high-precision machining tool for a profiled crankshaft according to claim 2, characterized in that: The slide (3) comprises a horizontal sliding module one (3a), the horizontal sliding module one (3a) is vertically connected with a vertical sliding module (3b), the vertical sliding module (3b) is vertically connected with a horizontal sliding module two (3c), and the horizontal sliding module two (3c) is connected with a disc seat (3d) for fixing the self-centering chuck (1).

4. The high-precision machining tool for a profiled crankshaft according to claim 3, characterized in that: The laser positioning assembly (6) comprises a laser emitting unit (6a) and a laser receiving unit (6b) matched with each other, the two units are respectively mounted on two disc seats (3d) arranged oppositely, and the laser positioning assembly (6) is arranged around the periphery of the self-centering chuck (1).

5. The high-precision machining tool for a profiled crankshaft according to claim 4, characterized in that: The slide table (4) comprises a horizontal sliding module three (4a) at the bottom, the movable part of the horizontal sliding module three (4a) is connected with the fixed table (2b), and the pressure sensing device (7) divides the lifting table (2c) into two sections.

6. The high-precision machining tool for a profiled crankshaft according to claim 5, characterized in that: The horizontal sliding module one (3a), the horizontal sliding module two (3c) and the horizontal sliding module three (4a) are arranged in parallel.

7. The high-precision machining tool for a profiled crankshaft according to claim 1, characterized in that: The horizontal positions and heights of the self-centering chuck (1) and the V-shaped supporting head (2a) are independently variable.

8. The high-precision machining tool for a profiled crankshaft according to claim 7, characterized in that: The number of the supporting tables (2) is greater than or equal to 2.

9. The high-precision machining tool for a profiled crankshaft according to claim 5, characterized in that: The measurement direction of the pressure sensing device (7) is vertical.

10. The high-precision machining tool for a profiled crankshaft according to claim 1, characterized in that: The movable clamping jaw (1a) is in the shape of " (", and the opening direction is toward the central axis of the self-centering chuck (1).

Images