Positioning clamp for special-shaped workpiece machining

Abstract

The utility model provides a locating fixture for processing a special-shaped workpiece, which relates to the technical field of locating fixtures, and comprises a fixture frame, a main locating fixture and an auxiliary locating fixture, a driving device is arranged at the upper part in the fixture frame, the driving device is connected with the main locating fixture, and the main locating fixture comprises a first locating clamping plate and a second locating clamping plate; a movable clamping plate is arranged in the cavity, the adjusting mechanism is connected with the movable clamping plate, the bottom of the first positioning clamping plate and the bottom of the second positioning clamping plate are each provided with a connecting base, electromagnetic rails are symmetrically arranged on one sides of the two connecting bases, and turnover mechanisms are arranged on the electromagnetic rails in a sliding mode; a positioning roller is rotationally arranged in the mounting frame; the movable clamping plate driven by the adjusting mechanism to move is arranged in the cavity in the first positioning clamping plate, and the special-shaped workpiece can be stably clamped through the auxiliary positioning clamp arranged in a matched mode.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning fixtures, in particular to a positioning fixture for processing special-shaped workpieces. Background Art

[0002] Special-shaped workpieces mostly refer to workpieces with irregular shapes. Special-shaped workpieces need to be clamped and positioned by positioning fixtures during welding, polishing, hardness testing, and size measurement. Currently, two sets of clamps are mostly used to clamp and fix the workpieces. This fixing method is mainly suitable for standard rotating workpieces such as cylindrical ones. Two sets of clamps can be used to quickly find the geometric center of the workpiece and fix it. However, for special-shaped workpieces, such as rotating workpieces with surface grooves, this clamping method cannot achieve stable clamping. Therefore, the utility model proposes a positioning fixture for processing special-shaped workpieces to solve the shortcomings of the prior art. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a positioning fixture for processing special-shaped workpieces. By setting a movable clamp driven by an adjustment mechanism inside the cavity inside the first positioning clamp, the auxiliary positioning fixture provided can achieve stable clamping of the special-shaped workpiece.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A positioning fixture for processing a special-shaped workpiece, comprising a fixture frame, a main positioning fixture and an auxiliary positioning fixture, wherein a driving device is arranged on the upper part of the fixture frame, and the driving device is connected to the main positioning fixture, and the main positioning fixture comprises a first positioning clamp and a second positioning clamp, wherein the first positioning clamp and the second positioning clamp are symmetrically arranged, and the first positioning clamp and the second positioning clamp are both connected to the driving device, a cavity is arranged inside the first positioning clamp, and a movable clamp is arranged inside the cavity, and an adjustment mechanism is arranged on the first positioning clamp, and the adjustment mechanism is connected to the movable clamp;

[0006] The first positioning clamp and the second positioning clamp are each provided with a connecting seat at the bottom, and electromagnetic rails are symmetrically provided on one side of the two connecting seats. A flipping mechanism is slidably provided on the electromagnetic rails. The auxiliary positioning fixture includes a mounting frame and a positioning roller. The mounting frame is connected to the flipping mechanism, and a positioning roller is rotatably provided inside the mounting frame.

[0007] Further improvements are: the driving device includes a bidirectional screw, a rotating wheel and a guide rod, a bidirectional screw is rotatably provided on the upper part of the clamp frame, a rotating wheel is provided at one end of the bidirectional screw, a guide rod is provided inside the clamp frame above the bidirectional screw, the upper ends of the first positioning clamp plate and the second positioning clamp plate are both threadedly connected to the bidirectional screw, and the upper ends of the first positioning clamp plate and the second positioning clamp plate are slidably connected to the guide rod.

[0008] A further improvement is that the adjustment mechanism includes a screw and a sleeve, a screw is rotatably provided on the first positioning clamp, a sleeve is slidably provided inside the first positioning clamp, one end of the sleeve is connected to the side wall of the movable clamp, and the sleeve is threadedly connected to the screw.

[0009] A further improvement is that the flipping mechanism includes a slide, a flipping motor and a flipping shaft, the slide is slidably connected to the electromagnetic track, a flipping groove is provided on the slide, a flipping shaft is rotatably provided inside the flipping groove, the flipping shaft is driven by the flipping motor, and the bottom of the mounting frame is connected to the flipping shaft.

[0010] A further improvement is that: sliding grooves are symmetrically arranged at the lower part of the clamp frame, and the connecting seat is slidably connected to the sliding grooves.

[0011] A further improvement is that a rubber sleeve is sleeved on the positioning roller, and one side of the positioning roller extends out of the outside of the mounting frame.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a movable clamping plate driven by an adjusting mechanism inside the cavity inside the first positioning clamping plate, and the auxiliary positioning clamp provided in combination can realize stable clamping of the special-shaped workpiece, and the positioning roller of the auxiliary positioning clamp clamps the end face of the workpiece to be clamped, and when the second positioning clamping plate contacts the workpiece and the first positioning clamping plate does not contact the workpiece, the positioning clamping force at this time is provided by the auxiliary positioning clamp. Since the auxiliary positioning angle is provided on the first positioning clamping plate and the second positioning clamping plate, it can move with the first positioning clamping plate and the second positioning clamping plate, and when the second positioning clamping plate contacts the workpiece, the workpiece has been moved to the middle position between the first positioning clamping plate and the second positioning clamping plate, and at this time, the workpiece can be clamped stably by driving the movable clamping plate to move out and clamping the workpiece by the adjusting mechanism; in order to avoid the influence of the auxiliary positioning clamp on the processing of the end face of the special-shaped workpiece without interference, the positioning roller inside the mounting frame of the auxiliary positioning clamp can be flipped by the flipping mechanism to expose the end face of the special-shaped workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 This is a side view schematic diagram of the auxiliary positioning fixture structure of the utility model;

[0015] Figure 3 This is a side view schematic diagram of the auxiliary positioning fixture of the utility model in a flipping state;

[0016] Figure 4 It is a side view schematic diagram of the positioning roller installation structure of the utility model;

[0017] Figure 5 This is a schematic diagram of the main view of the first state of the working principle of the structure of the utility model;

[0018] Figure 6 It is a schematic diagram of the main view of the second state of the working principle of the structure of the utility model.

[0019] Among them: 1. clamp frame; 2. drive device; 201. bidirectional screw; 202. rotating wheel; 203. guide rod; 3. first positioning clamp; 4. second positioning clamp; 5. cavity; 6. movable clamp; 7. connecting seat; 8. electromagnetic track; 9. turning mechanism; 901. slide seat; 902. turning motor; 903. turning shaft; 904. turning groove; 10. mounting frame; 11. positioning roller; 12. screw; 13. sleeve; 14. slide groove; 15. rubber sleeve. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0021] according to Figure 1-6 As shown, this embodiment proposes a positioning fixture for processing special-shaped workpieces, including a fixture frame 1, a main positioning fixture and an auxiliary positioning fixture, a driving device 2 is provided on the upper part of the fixture frame 1, and the driving device 2 is connected to the main positioning fixture, and the main positioning fixture includes a first positioning clamp plate 3 and a second positioning clamp plate 4, the first positioning clamp plate 3 and the second positioning clamp plate 4 are symmetrically arranged, and the first positioning clamp plate 3 and the second positioning clamp plate 4 are both connected to the driving device 2, a cavity 5 is provided inside the first positioning clamp plate 3, and a movable clamp plate 6 is provided inside the cavity 5, and an adjustment mechanism is provided on the first positioning clamp plate 3, and the adjustment mechanism is connected to the movable clamp plate 6;

[0022] The first positioning clamp plate 3 and the second positioning clamp plate 4 are each provided with a connecting seat 7 at the bottom, and electromagnetic rails 8 are symmetrically provided on one side of the two connecting seats 7. A flipping mechanism 9 is slidably provided on the electromagnetic rail 8. The auxiliary positioning fixture includes a mounting frame 10 and a positioning roller 11. The mounting frame 10 is connected to the flipping mechanism 9, and a positioning roller 11 is rotatably provided inside the mounting frame 10.

[0023] When the positioning fixture of the utility model clamps a cylindrical rotating body with grooves on the surface of a special-shaped workpiece (such as Figure 1 When the second positioning clamp 4 contacts the surface of the special-shaped workpiece and the first positioning clamp 3 does not contact the surface of the special-shaped workpiece, the movable clamp 6 in the internal cavity 5 of the first positioning clamp 3 is moved out by the adjustment mechanism until the movable clamp 6 cooperates with the second positioning clamp 4 to clamp the two sides of the special-shaped workpiece. During the movement of the first positioning clamp 3 and the second positioning clamp 4 approaching each other, since the positioning roller 11 is installed for rotation, the auxiliary positioning clamp will also move with the movement of the first positioning clamp 3 and the second positioning clamp 4; after the movable clamp 6 and the second positioning clamp 4 clamp the two sides of the special-shaped workpiece, the turning mechanism 9 is used to turn over the mounting frame 10, so that the positioning roller 11 no longer provides a pre-clamping force, so that the mounting frame 10 is not interfered with when processing the end face of the special-shaped workpiece.

[0024] The driving device 2 includes a bidirectional screw 201, a rotating wheel 202 and a guide rod 203. The bidirectional screw 201 is rotatably arranged on the upper part of the clamp frame 1. A rotating wheel 202 is arranged at one end of the bidirectional screw 201. A guide rod 203 is arranged inside the clamp frame 1 above the bidirectional screw 201. The upper ends of the first positioning clamp plate 3 and the second positioning clamp plate 4 are both threadedly connected to the bidirectional screw 201, and the upper ends of the first positioning clamp plate 3 and the second positioning clamp plate 4 are slidably connected to the guide rod 203. The bidirectional screw 201 is driven to rotate by rotating the rotating wheel 202, thereby driving the first positioning clamp plate 3 and the second positioning clamp plate 4 to move relatively on the bidirectional screw 201 and the guide rod 203.

[0025] The adjustment mechanism includes a screw 12 and a sleeve 13. The screw 12 is rotatably provided on the first positioning clamp 3. The sleeve 13 is slidably provided inside the first positioning clamp 3. One end of the sleeve 13 is connected to the side wall of the movable clamp 6, and the sleeve 13 is threadedly connected to the screw 12. The movable clamp 6 connected to the sleeve 13 can be driven to move by rotating the screw 12.

[0026] The flip mechanism 9 includes a slide 901, a flip motor 902 and a flip shaft 903. The slide 901 is slidably connected to the electromagnetic track 8. A flip groove 904 is provided on the slide 901. A flip shaft 903 is rotatably provided inside the flip groove 904. The flip shaft 903 is driven by the flip motor 902. The bottom of the mounting frame 10 is connected to the flip shaft 903. The mounting frame 10 installed on the flip shaft 903 is flipped by starting the flip motor 902. In the utility model, the mounting frames 10 at both ends of the special-shaped workpiece flip in opposite directions.

[0027] The lower part of the clamp frame 1 is symmetrically provided with a slide groove 14, and the connecting seat 7 is slidably connected to the slide groove 14. By providing the slide groove 14, the connecting seat 7 is slidably connected to the slide groove 14 to improve the stability and smoothness of the auxiliary positioning clamp when following the first positioning clamp plate 3 and the second positioning clamp plate 4.

[0028] The positioning roller 11 is sleeved with a rubber sleeve 15, and one side of the positioning roller 11 extends out of the outside of the mounting frame 10. The rubber sleeve 15 can be provided to clamp and protect both end surfaces of the special-shaped workpiece.

[0029] The utility model provides a movable clamping plate 6 driven by an adjusting mechanism inside the cavity 5 inside the first positioning clamping plate 3, and the auxiliary positioning fixture provided can stably clamp the special-shaped workpiece. The positioning roller 11 of the auxiliary positioning clamp clamps the end face of the workpiece to be clamped. When the second positioning clamping plate 4 contacts the workpiece and the first positioning clamping plate 3 does not contact the workpiece, the positioning clamping force at this time is provided by the auxiliary positioning clamp. Since the auxiliary positioning angle is set on the first positioning clamping plate 3 and the second positioning clamping plate 4, it can move with the first positioning clamping plate 3 and the second positioning clamping plate 4. When the second positioning clamping plate 4 contacts the workpiece, the workpiece has been moved to the middle position between the first positioning clamping plate 3 and the first positioning clamping plate 3. At this time, the workpiece can be stably clamped by driving the movable clamping plate 6 to move out through the adjusting mechanism to clamp the workpiece. In order to avoid the influence of the auxiliary positioning clamp on the processing of the end face of the special-shaped workpiece, the positioning roller 11 inside the mounting frame 10 of the auxiliary positioning clamp can be flipped by the flipping mechanism 9 to expose the end face of the special-shaped workpiece.

[0030] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A positioning fixture for processing special-shaped workpieces, characterized in that: The invention comprises a fixture frame (1), a main positioning fixture and an auxiliary positioning fixture, wherein a driving device (2) is provided on the upper part of the fixture frame (1), the driving device (2) is connected to the main positioning fixture, the main positioning fixture comprises a first positioning clamp (3) and a second positioning clamp (4), the first positioning clamp (3) and the second positioning clamp (4) are symmetrically arranged, and the first positioning clamp (3) and the second positioning clamp (4) are both connected to the driving device (2), a cavity (5) is provided inside the first positioning clamp (3), a movable clamp (6) is provided inside the cavity (5), an adjustment mechanism is provided on the first positioning clamp (3), and the adjustment mechanism is connected to the movable clamp (6); The first positioning clamp (3) and the second positioning clamp (4) are each provided with a connecting seat (7) at the bottom, and electromagnetic tracks (8) are symmetrically provided on one side of the two connecting seats (7). A flipping mechanism (9) is slidably provided on the electromagnetic track (8). The auxiliary positioning fixture comprises a mounting frame (10) and a positioning roller (11). The mounting frame (10) is connected to the flipping mechanism (9), and a positioning roller (11) is rotatably provided inside the mounting frame (10).

2. A positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: The driving device (2) comprises a bidirectional screw (201), a rotating wheel (202) and a guide rod (203); a bidirectional screw (201) is rotatably arranged on the upper part of the clamp frame (1); a rotating wheel (202) is arranged at one end of the bidirectional screw (201); a guide rod (203) is arranged on the clamp frame (1) above the bidirectional screw (201); the upper ends of the first positioning clamp plate (3) and the second positioning clamp plate (4) are both threadedly connected to the bidirectional screw (201); and the upper ends of the first positioning clamp plate (3) and the second positioning clamp plate (4) are slidably connected to the guide rod (203).

3. The positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: The adjustment mechanism comprises a screw (12) and a sleeve (13); the screw (12) is rotatably provided on the first positioning clamp (3); the sleeve (13) is slidably provided inside the first positioning clamp (3); one end of the sleeve (13) is connected to the side wall of the movable clamp (6), and the sleeve (13) is threadedly connected to the screw (12).

4. The positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: The flip mechanism (9) comprises a slide seat (901), a flip motor (902) and a flip shaft (903); the slide seat (901) is slidably connected to the electromagnetic track (8); a flip groove (904) is provided on the slide seat (901); a flip shaft (903) is rotatably provided inside the flip groove (904); the flip shaft (903) is driven by the flip motor (902); and the bottom of the mounting frame (10) is connected to the flip shaft (903).

5. The positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: The clamp frame (1) is symmetrically provided with sliding grooves (14) at the lower part thereof, and the connecting seat (7) is slidably connected to the sliding grooves (14).

6. The positioning fixture for processing special-shaped workpieces according to claim 1, characterized in that: A rubber sleeve (15) is sleeved on the positioning roller (11), and one side of the positioning roller (11) extends out of the outside of the mounting frame (10).

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