Fixture suitable for linear cutting connecting rod tooth profile machining

Abstract

The utility model discloses a clamp suitable for linear cutting connecting rod tooth profile machining, which is used for positioning a connecting rod comprising a first hole and a second hole so as to enable a cutting device to carry out linear cutting and tooth profile machining, and relates to the technical field of mechanical tool clamps, the clamp comprises a base, a first positioning piece, a second positioning piece and a fixing piece, the first positioning piece, the second positioning piece and the fixing piece are arranged on the same side of the base, the first positioning piece comprises a rotating part matched with the first hole so that the connecting rod can rotate around the axis of the first hole, the second positioning piece and the second hole are assembled, and the second positioning piece and the second hole can move relatively; the fixing piece is used for driving the connecting rod to move towards the fixing piece until the second positioning piece abuts against the inner wall of the second hole; the molybdenum wire can be prevented from being pinched off easily during tooth repairing, and meanwhile the tooth profile fitting degree after the connecting rod body and the connecting rod cover are machined is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical frock clamp technical field, especially in a kind of clamp suitable for wire cutting connecting rod tooth shape processing. BACKGROUND

[0002] Connecting rod is one of extremely important transmission parts in diesel engine, is the component of connecting piston and crankshaft movement.Connecting rod generally includes connecting rod body and connecting rod cover, then through tooth shape engagement after use connecting rod bolt locking fixed, for the tooth shape engagement after connecting rod tooth shape of medium-speed diesel engine of high power, its tooth shape surface contact area must reach 80%, therefore the machining precision requirement of connecting rod tooth shape is very high, and then the positioning and clamping requirement when connecting rod body and connecting rod cover machining tooth shape is also higher.

[0003] Since connecting rod body and connecting rod cover are all special-shaped structures, there is a positioning and clamping problem when machining tooth shape structure.The existing positioning and clamping is generally through manual clamping, and connecting rod itself is heavy, manual operation is inconvenient, clamping efficiency is low, improves manufacturing cost, and tooth shape machining of connecting rod body and connecting rod cover is positioned and machined on different positioning clamps, so it is difficult to meet the engagement requirement of tooth shape structure on connecting rod body and connecting rod cover and the cooperation requirement between connecting rod body and connecting rod cover.

[0004] The existing equipment generally adopts wire cutting method, adopts the method of cutting and repairing when cutting tooth, in the machining process, positioning of big and small holes, when workpiece end face clamping, connecting rod body and connecting rod cover are cut open, molybdenum wire is easy to break when tooth is repaired, after machining is completed, tooth shape fitting degree is low, when workpiece is loosened, tooth shape fitting degree is reduced when tooth is repaired respectively.

[0005] Therefore, how to avoid molybdenum wire easy to break when tooth is repaired, and improve tooth shape fitting degree after connecting rod body and connecting rod cover are machined, is the technical problem that present technical personnel in the field need to solve. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of clamp suitable for wire cutting connecting rod tooth shape processing, avoid molybdenum wire easy to break when tooth is repaired, and improve tooth shape fitting degree after connecting rod body and connecting rod cover are machined.

[0007] To realize the above-mentioned purpose, the utility model provides a kind of clamp suitable for wire cutting connecting rod tooth shape processing, for positioning connecting rod including first hole and second hole for cutting device to carry out wire cutting and tooth shape machining, clamp includes base, first positioning piece, second positioning piece and fixing piece, first positioning piece, second positioning piece and fixing piece are set on the same side of base, first positioning piece includes rotation part suitable for first hole to make connecting rod rotate around the axis of first hole, second positioning piece is assembled with second hole, and second positioning piece is movable relative to second hole, and fixing piece is used to drive connecting rod to move towards fixing piece until second positioning piece abuts with the inner wall of second hole.

[0008] Preferably, the first positioning member further comprises a supporting portion connected to the rotating portion, a side of the supporting portion away from the rotating portion is attached to the base, and a side of the supporting portion away from the base is provided with a first supporting surface;

[0009] The connecting rod comprises a first end provided with a first hole, and a bottom of the first end is provided with a first plane perpendicular to an axis of the first hole, and the first supporting surface can be attached to the first plane to support the first end.

[0010] Preferably, the clamp further comprises a pad provided on the base, and a side of the pad away from the base is provided with a second supporting surface;

[0011] The connecting rod further comprises a second end provided with a second hole, and a bottom of the second end is provided with a second plane perpendicular to an axis of the second hole, and the second supporting surface can be attached to the second plane to support the second end.

[0012] Preferably, the rotating portion protrudes from the first supporting surface of the supporting portion, the rotating portion comprises a first abutting surface located in a circumferential direction of the rotating portion, the first abutting surface is used to attach to an inner wall of the first hole, and a central axis of the rotating portion is collinear with the axis of the first hole.

[0013] Preferably, the second positioning member comprises:

[0014] a positioning column, one end of the positioning column is provided in the pad and fixedly connected to the base;

[0015] a sleeve, located above the base, the sleeve is sleeved on the other end of the positioning column, the sleeve can rotate relative to the positioning column, and the sleeve is provided with a second abutting surface located in a circumferential direction of the sleeve to abut against an inner wall of the second hole.

[0016] Preferably, a side of the clamp facing the connecting rod is concave to form a clearance space, the connecting rod further comprises a linking segment connected to the first end and the second end, the clearance space is located between the first positioning member and the pad, so that there is a gap between the linking segment and the clamp, and the gap is used for taking and placing the connecting rod.

[0017] Preferably, the pad is provided with a through hole for the positioning column to pass through, and there is a gap between an inner wall of the through hole and the sleeve.

[0018] Preferably, the first positioning member is detachably connected to the base through a first connecting member, and the pad is detachably connected to the base through a second connecting member.

[0019] Preferably, the fixing member is specifically a magnetic base, the magnetic base can be magnetically attracted to the base, and the magnetic base can be magnetically attracted to the second end to limit rotation of the connecting rod.

[0020] Preferably, the magnetic base is at least two, and all the magnetic bases are arranged at intervals to magnetically attract different positions of the second end.

[0021] With respect to the above background art, the clamp suitable for line cutting connecting rod tooth shape processing provided by the utility model has at least the following technical effects:

[0022] The first hole of the connecting rod is installed into the rotating part of the first positioning member, the one end of the connecting rod provided with the first hole is positioned, and the connecting rod can rotate around the axis of the first hole; the second hole of the connecting rod is assembled with the second positioning member, and the one end of the connecting rod provided with the second hole is movable relative to the second positioning member; then the connecting rod is driven by the fixing member to move towards the fixing member until the second positioning member abuts against the inner wall of the second hole, so that the connecting rod is fixed to the preset position of the base; then the connecting rod is cut at the second hole to form the connecting rod body and the connecting rod cover, the cutting position is located between the second positioning member and the fixing member, the continuous rotation of the connecting rod is limited by the blocking of the second positioning member, and the workpiece deformation problem caused by mechanical clamping is avoided; meanwhile, after the connecting rod is cut, the connecting rod body is rotated in the direction away from the connecting rod cover, so that the connecting rod body and the connecting rod cover are separated; at this time, the connecting rod cover is located at the original position for tooth shape processing; after the tooth shape processing of the connecting rod cover is completed, the connecting rod cover is removed, the connecting rod body is rotated towards the connecting rod cover, so that the connecting rod body abuts against the second positioning member to return to the original position for tooth shape processing; the tooth shape processing of the connecting rod cover and the connecting rod body is carried out at the same position, the tooth shape adhesion of the connecting rod body and the connecting rod cover can be improved, and the problem of low tooth shape adhesion of the connecting rod body and the connecting rod cover can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only the embodiments of the utility model, and other drawings can be obtained by the provided drawings without creative labor for the ordinary skilled in the art.

[0024] Fig. 1 The structure sectional view of the clamp provided by the utility model embodiment for positioning the connecting rod;

[0025] Fig. 2 The structure schematic view of the clamp provided by the utility model embodiment for positioning the connecting rod;

[0026] Fig. 3 The structure schematic view of the connecting rod cut into the connecting rod body and the connecting rod cover provided by the utility model embodiment;

[0027] Fig. 4 The structure schematic view of the connecting rod body for tooth shape processing provided by the utility model embodiment.

[0028] Among them:

[0029] 100-link, 110-first hole, 120-second hole, 130-first end, 140-second end, 150-adapter section, 160-link body, 170-link cover;

[0030] 200-base, 210-clearance;

[0031] 300-first positioning member, 310-rotation part, 320-support part;

[0032] 400-second positioning member, 410-positioning column, 420-sleeve;

[0033] 500-fixing member;

[0034] 600-pad block;

[0035] 700-first connecting member;

[0036] 800-second connecting member. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] In order to make the person skilled in the art better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0039] In the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the position or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the present application.

[0040] The present application aims to provide a clamp suitable for linear cutting link tooth shape processing, which can avoid the easy breakage of molybdenum wire during tooth repair processing, and at the same time improve the tooth shape fit after processing of the link body 160 and the link cover 170.

[0041] Please refer to Figs. 1 to 4To achieve the above object, the utility model provides a kind of clamp suitable for wire cutting connecting rod tooth shape processing, for positioning connecting rod 100 including first hole 110 and second hole 120 to be cut by cutting device and tooth shape processing, clamp includes pedestal 200, first positioning piece 300, second positioning piece 400 and fixing piece 500, first positioning piece 300, second positioning piece 400 and fixing piece 500 are set to the same side of pedestal 200, first positioning piece 300 includes the rotating part 310 adapted to first hole 110 to be rotated around the axis of first hole 110 of connecting rod 100, second positioning piece 400 is assembled with second hole 120, and second positioning piece 400 is movable relative to second hole 120, and fixing piece 500 is used to drive connecting rod 100 towards fixing piece 500 and move until second positioning piece 400 and the inner wall of second hole 120 abut.

[0042] The first hole 110 of connecting rod 100 is loaded into the rotating part 310 of first positioning piece 300, the positioning of the one end of connecting rod 100 provided with first hole 110 is realized, and connecting rod 100 can rotate around the axis of first hole 110, the second hole 120 of connecting rod 100 is assembled with second positioning piece 400, so that the one end of connecting rod 100 provided with second hole 120 is movable relative to second positioning piece 400, then the connecting rod 100 is driven towards the fixing piece 500 by the fixing piece 500 until the second positioning piece 400 and the inner wall of the second hole 120 abut, so that the connecting rod 100 is fixed to the preset position of the pedestal 200, then the connecting rod 100 is cut at the second hole 120 to form the connecting rod body 160 and the connecting rod cover 170, and the cutting position is located between the second positioning piece 400 and the fixing piece 500, the continuous rotation of the connecting rod 100 is limited by the blocking of the second positioning piece 400, and the workpiece deformation problem caused by mechanical clamping is avoided.

[0043] When the connecting rod 100 is cut, the connecting rod body 160 is rotated in the direction away from the connecting rod cover 170, so that the connecting rod body 160 and the connecting rod cover 170 are separated, at this time, the connecting rod cover 170 is located in the original position for tooth shape processing, after the tooth shape processing of the connecting rod cover 170 is completed, the connecting rod cover 170 is removed, the connecting rod body 160 is rotated towards the connecting rod cover 170, so that the connecting rod body 160 abuts against the second positioning piece 400 to return to the original position for tooth shape processing, the tooth shape processing of the connecting rod cover 170 and the connecting rod body 160 is carried out at the same position, which can improve the tooth shape fit degree of the connecting rod body 160 and the connecting rod cover 170, and avoid the problem of low tooth shape fit degree of the connecting rod body 160 and the connecting rod cover 170.

[0044] In one embodiment, the first positioning member 300 further comprises a supporting portion 320 connected to the rotating portion 310, the supporting portion 320 is attached to the base 200 on the side away from the rotating portion 310, and the side of the supporting portion 320 away from the base 200 is provided with a first supporting surface; the connecting rod 100 comprises a first end 130 provided with a first hole 110, and the bottom of the first end 130 is provided with a first plane perpendicular to the axis of the first hole 110, and the first supporting surface can be attached to the first plane to support the first end 130. By attaching the first supporting surface to the first plane, the first end 130 of the connecting rod 100 is stably placed at a predetermined height. The first supporting surface is a planar structure, the first plane is a planar structure, and the planar structures are both perpendicular to the axis of the first hole 110, so that the first supporting surface and the first plane are always in contact during the rotation of the connecting rod 100 around the axis of the first hole 110, avoiding the problem of height misalignment during the rotation of the connecting rod 100.

[0045] The rotating portion 310 protrudes from the first supporting surface of the supporting portion 320, and the first positioning member 300 is a stepped structure. The rotating portion 310 comprises a first abutting surface in the circumferential direction thereof, the first abutting surface is used to attach to the inner wall of the first hole 110, and the central axis of the rotating portion 310 is collinear with the axis of the first hole 110, so as to position the first end 130 of the connecting rod 100 and avoid the problem of shaking caused by the large gap between the inner wall of the first hole 110 and the first abutting surface.

[0046] In one embodiment, the clamp further comprises a pad 600 provided on the base 200, and the side of the pad 600 away from the base 200 is provided with a second supporting surface; the connecting rod 100 further comprises a second end 140 provided with a second hole 120, and the bottom of the second end 140 is provided with a second plane perpendicular to the axis of the second hole 120, and the second supporting surface can be attached to the second plane to support the second end 140.

[0047] It can be understood that, in order to ensure the stability of the connecting rod 100 after being placed in the clamp, in addition to supporting the first end 130 of the connecting rod 100 by the supporting portion 320, the pad 600 provided on the base 200 is also used to support the second end 140 of the connecting rod 100. The second supporting surface is a planar structure that can be attached to the second plane, so as to ensure that the second supporting surface is always in contact with the second plane during the rotation of the connecting rod 100, and guarantee the stability of the connecting rod 100 during the rotation. When the first plane is parallel to the second plane, the first supporting surface is parallel to the second supporting surface.

[0048] In one of the embodiments, the second positioning member 400 comprises a positioning column 410 and a sleeve 420, one end of the positioning column 410 is arranged in the pad 600 and fixedly connected to the base 200, the positioning column 410 is a column structure, and the axis of the positioning column 410 is parallel to the axis of the second hole 120, the sleeve 420 is located above the base 200, and the sleeve 420 is sleeved on the other end of the positioning column 410, the sleeve 420 can rotate relative to the positioning column 410, and the sleeve 420 is provided with a second abutting surface located in the circumferential direction of the sleeve 420 to abut against the inner wall of the second hole 120.

[0049] In one of the embodiments, the second positioning member 400 comprises a positioning column 410 and a sleeve 420, one end of the positioning column 410 is arranged in the pad 600 and fixedly connected to the base 200, the positioning column 410 is a column structure, and the axis of the positioning column 410 is parallel to the axis of the second hole 120, the sleeve 420 is located above the base 200, and the sleeve 420 is sleeved on the other end of the positioning column 410, the sleeve 420 can rotate relative to the positioning column 410, and the sleeve 420 is provided with a second abutting surface located in the circumferential direction of the sleeve 420 to abut against the inner wall of the second hole 120.

[0050] In addition, a through hole for the positioning column 410 to pass through can be arranged on the pad 600, which facilitates the fixation of the positioning column 410 to the base 200, and the through hole can also be arranged as a threaded hole matched with the external threaded segment of the positioning column 410. When the pad 600 and the base 200 are regarded as a whole, the fixation of the positioning column 410 can be achieved by screwing the positioning column 410 into the pad 600. There is a gap between the inner wall of the through hole and the sleeve 420 to avoid affecting the flexibility of the rotation of the sleeve 420.

[0051] In one of the embodiments, the first positioning member 300 is detachably connected to the base 200 through the first connecting member 700, and the pad 600 is detachably connected to the base 200 through the second connecting member 800. Both the first positioning member 300 and the second positioning member 400 can adopt bolts. Holes are opened on the first support surface of the support part 320 and the second support surface of the pad 600, so that the bolts are connected to the base 200 after being screwed into the corresponding holes, for the detachable connection of the first positioning member 300 and the pad 600 relative to the base 200. The top of the bolt is located lower than the corresponding first support surface and second support surface. The first positioning member 300 and the pad 600 can be replaced according to different models of the connecting rod 100, which increases the applicability of the clamp and facilitates the disassembly of the worn first positioning member 300 and pad 600, so as to ensure the accuracy of the positioning of the clamp to the connecting rod 100.

[0052] In one embodiment, the fixing member 500 is a magnetic base capable of being magnetically attracted to the base 200 and capable of being magnetically attracted to the second end 140 to limit the rotation of the connecting rod 100. There are at least two magnetic bases, which are spaced apart to be magnetically attracted to different positions of the second end 140. Generally, the magnetic attraction position of the magnetic base to the base 200 is when the second hole 120 abuts against the second positioning member 400, the magnetic base is in contact with the second end 140 of the connecting rod 100. Different positions of the magnetic base can be marked according to different positions of the connecting rod 100 on the base 200, so as to quickly find the position of the magnetic base when the connecting rod 100 is cut again in the subsequent process, thereby improving the work efficiency.

[0053] In addition, the side portion of the clamp facing the connecting rod 100 is concave to form the clearance 210. The connecting rod 100 further comprises a connecting segment 150 connected to the first end 130 and the second end 140. The clearance 210 is located between the first positioning member 300 and the pad 600, so that there is a gap between the connecting segment 150 and the clamp, facilitating the taking and placing of the connecting rod 100.

[0054] In summary, the clamp suitable for wire cutting connecting rod tooth shape processing provided by the present application is used to load the first hole 110 of the connecting rod 100 into the rotating part 310 of the first positioning member 300, so as to realize the positioning of one end of the connecting rod 100 provided with the first hole 110. The connecting rod 100 can rotate around the axis of the first hole 110. The second hole 120 of the connecting rod 100 is assembled with the second positioning member 400, so that the end of the connecting rod 100 provided with the second hole 120 is movable relative to the second positioning member 400. Then, the magnetic base is used to magnetically attract the connecting rod 100 to drive the connecting rod 100 to move until the second positioning member 400 abuts against the inner wall of the second hole 120, so as to limit the continuous movement of the connecting rod 100, thereby avoiding the problem of workpiece deformation caused by mechanical clamping. After the connecting rod 100 is cut, the connecting rod body 160 is rotated in a direction away from the connecting rod cover 170, so that the connecting rod body 160 and the connecting rod cover 170 are separated. The connecting rod cover 170 is magnetically attracted and fixed in the original position for tooth shape processing. After the tooth shape processing of the connecting rod cover 170 is completed, the connecting rod cover 170 is removed, and the connecting rod body 160 is rotated towards the connecting rod cover 170, so that the connecting rod body 160 abuts against the second positioning member 400 to return to the original position for tooth shape processing. The tooth shape processing of the connecting rod cover 170 and the connecting rod body 160 is performed at the same position, which can improve the tooth shape fit degree of the connecting rod body 160 and the connecting rod cover 170, and avoid the problem of low tooth shape fit degree of the connecting rod body 160 and the connecting rod cover 170.

[0055] It should be noted that in the present specification, the relational terms such as first and second are used only to differentiate one entity from another, without necessarily requiring or implying any such actual relationship or order between these entities.

[0056] The various embodiments are described in the specification by way of progression, each building on the last to facilitate ease of understanding. The same or similar reference numerals are used in the drawings and description to refer to the same or like parts, components and operations throughout.

[0057] The principles and implementation modes of the present application are described herein by using specific examples. The above description of the embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A fixture suitable for wire cutting tooth profiling of a connecting rod, for positioning a connecting rod (100) comprising a first bore (110) and a second bore (120) for wire cutting and tooth profiling by a cutting device, characterized in that, The clamp comprises a base (200), a first positioning member (300), a second positioning member (400) and a fixing member (500), the first positioning member (300), the second positioning member (400) and the fixing member (500) are arranged on the same side of the base (200), the first positioning member (300) comprises a rotating part (310) adapted to the first hole (110) for the connecting rod (100) to rotate around the axis of the first hole (110), the second positioning member (400) is assembled with the second hole (120), and the second positioning member (400) is movable relative to the second hole (120), and the fixing member (500) is used to drive the connecting rod (100) to move towards the fixing member (500) until the second positioning member (400) abuts against the inner wall of the second hole (120).

2. The fixture suitable for wire cutting connecting rod tooth profile machining according to claim 1, characterized in that, The first positioning member (300) further comprises a supporting part (320) connected to the rotating part (310), one side of the supporting part (320) away from the rotating part (310) is attached to the base (200), and the other side of the supporting part (320) away from the base (200) is provided with a first supporting surface; The connecting rod (100) comprises a first end (130) provided with the first hole (110), the bottom of the first end (130) is provided with a first plane perpendicular to the axis of the first hole (110), and the first supporting surface can be attached to the first plane to support the first end (130).

3. The fixture suitable for wire cutting connecting rod tooth profile machining according to claim 2, characterized in that, The clamp further comprises a cushion block (600) arranged on the base (200), and the other side of the cushion block (600) away from the base (200) is provided with a second supporting surface; The connecting rod (100) further comprises a second end (140) provided with the second hole (120), and the bottom of the second end (140) is provided with a second plane perpendicular to the axis of the second hole (120), and the second supporting surface can be attached to the second plane to support the second end (140).

4. The fixture suitable for wire cutting connecting rod tooth profile machining according to claim 2, characterized in that, The rotating part (310) protrudes from the first supporting surface of the supporting part (320), the rotating part (310) comprises a first abutting surface located in the circumferential direction of the rotating part (310), the first abutting surface is used to abut against the inner wall of the first hole (110), and the central axis of the rotating part (310) is collinear with the axis of the first hole (110).

5. The fixture suitable for wire cut connecting rod tooth profile machining according to claim 3, characterized in that, The second positioning member (400) comprises: a positioning column (410) arranged at one end of the cushion block (600) and fixedly connected to the base (200); a sleeve (420) located above the base (200), the sleeve (420) is sleeved on the other end of the positioning column (410), the sleeve (420) can rotate relative to the positioning column (410), and the sleeve (420) is provided with a second abutting surface located in the circumferential direction of the sleeve (420) to abut against the inner wall of the second hole (120).

6. The fixture suitable for wire cut connecting rod tooth profile machining according to claim 3, characterized in that, The clamp is concave towards one side of the connecting rod (100) to form a clearance (210), the connecting rod (100) further comprises a connecting section (150) connected to the first end (130) and the second end (140), the clearance (210) is located between the first positioning member (300) and the pad (600) to form a gap between the connecting section (150) and the clamp for taking and placing the connecting rod (100).

7. The fixture suitable for wire cut connecting rod tooth profile machining according to claim 5, characterized in that, The pad (600) is provided with a through hole for the positioning column (410) to pass through, and an interval exists between the inner wall of the through hole and the sleeve (420).

8. The fixture suitable for wire cut connecting rod tooth profile machining according to claim 5, characterized in that, The first positioning member (300) is detachably connected to the base (200) through a first connecting member (700), and the pad (600) is detachably connected to the base (200) through a second connecting member (800).

9. The fixture suitable for wire cut connecting rod tooth profile machining according to claim 3, characterized in that, The fixing member (500) is specifically a magnetic base, the magnetic base can be magnetically attracted to the base (200), and the magnetic base can be magnetically attracted to the second end (140) to limit the rotation of the connecting rod (100).

10. The fixture suitable for wire cutting connecting rod tooth profile machining according to claim 9, characterized in that, The magnetic base is at least two, and all the magnetic bases are arranged at intervals to be magnetically attracted to different positions of the second end (140).

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