A slow wire cutting tooling

Abstract

The utility model provides a kind of slow wire cutting tool, it is related to tool fixture technical field, the tool includes fixed base plate, compression plate and tool plate;Fixed base plate is fixedly installed on cutting machine, compression plate is fixedly installed in fixed base plate with tool plate;Tool plate is equipped with installation clamping hole, first locking block and second locking block are further fixedly installed in tool plate edge, two locking blocks can be locked by locking screw.The utility model has the beneficial effects that: installation clamping hole can accurately clamp the cam to be processed, the installation clamping hole effectively reduces the runout error of cam to improve the machining accuracy of cam;The locking gap of the tool can be adjusted by locking screw, so the hole diameter of installation clamping hole can be adjusted within the range, so as to facilitate the installation of cam, the tool can improve the clamping and machining efficiency of cam, and the tool has the advantages of simple structure, easy to manufacture, low cost.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, specifically to a slow wire EDM tooling. Background Technology

[0002] In the field of harmonic reducers, the cam of the harmonic reducer is usually connected to the output shaft of the motor through a key and keyway fit. As a key component for transmitting motion and power, the machining accuracy of the keyway of the cam directly affects the assembly accuracy with other components and the transmission performance.

[0003] The commonly used cam keyway cutting fixtures typically use a general-purpose clamping block for clamping, followed by calibration with a lever micrometer, and then wire EDM machining. In batch processing, the calibration time is relatively long, and the clamping block needs to be frequently disassembled and reassembled during the clamping process. Furthermore, the circumferential positioning between the cam and the clamping block takes a long time, resulting in poor clamping accuracy consistency and low clamping efficiency, which affects the processing progress and the machining accuracy of the cam keyway.

[0004] Therefore, there is an urgent need to design a special clamping fixture for machining cam keyways to solve the above problems and improve machining accuracy and efficiency. Utility Model Content In view of this, the main objective of this utility model is to provide a slow wire EDM fixture. This fixture precisely clamps the cam to be processed through mounting clamping holes, effectively reducing cam runout errors and improving cam machining accuracy. The annular boss inside the mounting clamping holes of this fixture can conveniently perform circumferential positioning of the cam, further improving cam clamping accuracy. The locking clearance of this fixture can be adjusted by locking screws, facilitating cam installation. This fixture can improve cam clamping and machining efficiency.

[0005] To achieve the above objectives, this utility model provides a slow wire EDM fixture for clamping cams for machining cams, comprising: a fixed base plate, a clamping plate, and a fixture plate. The fixed base plate is used for fixed installation on the cutting machine tool, the clamping plate is fixed on the fixed base plate, the clamping plate and the fixed base plate have a clamping gap at their ends, and the edge of the tooling plate is clamped and fixed in the clamping gap; The tooling plate is provided with mounting clamping holes, and a first locking block and a second locking block are fixedly installed on the edge of the tooling plate. There is a locking gap between the two locking blocks, and the locking gap extends to the edge of the mounting clamping holes and communicates with the mounting clamping holes. The first locking block and the second locking block are respectively provided with a first locking hole and a second locking hole arranged coaxially. The axes of the first locking hole and the second locking hole are both perpendicular to the axis of the mounting clamping hole. The first locking hole passes through the first locking block and a locking screw is provided in the first locking hole. The end of the locking screw extends into the second locking hole.

[0006] Furthermore, an annular boss is provided in the mounting clamping hole, which is used to position the end face of the cam to be processed. Furthermore, the mounting clamping hole annular boss is provided with a notch, which is used to avoid the keyway to be processed. Furthermore, at least two positioning protrusions are fixedly provided on the annular boss, and the line connecting the centers of the positioning protrusions is parallel to the bottom surface of the keyway to be processed. Furthermore, all the positioning protrusions are hemispherical structures, and the diameter of the positioning protrusion is equal to the diameter of the positioning hole on the end face of the cam to be processed. Furthermore, the positioning protrusion is a frustum structure, and the bottom diameter of the positioning protrusion is equal to the diameter of the positioning hole on the end face of the cam to be processed. Furthermore, the fixed base plate has a lower clamping groove at its end, and the clamping plate has a lower clamping groove at its end. The upper clamping groove and the lower clamping groove are aligned to form the clamping gap.

[0007] Furthermore, the fixed base plate is provided with multiple mounting and locking holes, and mounting screws are provided in the mounting and locking holes. The mounting screws will neck the fixed base plate and install it on the cutting machine tool.

[0008] Furthermore, both the fixed base plate and the clamping plate are provided with adjustment locking holes. The adjustment locking holes on the fixed base plate are aligned with the adjustment locking holes on the clamping plate. An adjustment screw is provided in the adjustment locking hole, and the adjustment screw locks the clamping plate to the fixed base plate.

[0009] Furthermore, the mounting screws, adjusting screws, and locking screws are all hexagon socket head cap screws.

[0010] The beneficial effects of this slow wire EDM fixture are: (1) The fixture includes a fixed base plate, a clamping plate and a fixture plate; the fixed base plate is fixedly installed on the cutting machine tool, and the clamping plate clamps and fixes the fixture plate to the fixed base plate; the fixture plate is provided with mounting clamping holes, and a first locking block and a second locking block are also fixedly installed on the edge of the fixture plate. There is a locking gap between the two locking blocks. A locking screw is provided in the first locking hole, and the end of the locking screw extends into the second locking hole. The mounting clamping hole can accurately clamp the cam to be processed. The mounting clamping hole and the outer ring of the cam are in surface contact. The mounting clamping hole effectively reduces the runout error of the cam and improves the cam processing accuracy.

[0011] (2) The tooling has an annular boss in the mounting clamping hole, and at least two positioning protrusions are fixed on the annular boss. The annular boss can position the end face of the cam to be processed, and the positioning protrusions can position the cam mounting angle. The annular boss and the positioning protrusions can conveniently position the cam in the circumferential direction, which can further improve the cam clamping accuracy.

[0012] (3) The locking gap of the tooling can be adjusted by locking the locking screw, so that the diameter of the mounting clamping hole can be adjusted within the range, thus facilitating the installation of the cam. The tooling can improve the clamping and processing efficiency of the cam, and the tooling has the advantages of simple structure, easy manufacturing and low cost. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0013] Figure 1 This is a perspective view of the cam to be processed according to an embodiment of the present invention.

[0014] Figure 2 This is a side view of the cam to be processed according to an embodiment of the present invention.

[0015] Figure 3 This is a top view of a slow wire EDM tooling in operation according to an embodiment of the present invention.

[0016] Figure 4 This is a perspective view of a tooling plate for a slow wire EDM tooling according to an embodiment of the present invention.

[0017] Figure 5 This is a side view of the tooling plate of a slow wire EDM tooling according to an embodiment of the present invention, when a cam is clamped.

[0018] Figure 6 This is a top view of the tooling plate of a slow wire EDM tooling according to an embodiment of the present invention, when a cam is clamped.

[0019] Wherein, 1-cam to be processed, 11-clamping end, 12-positioning hole, 103-keyway, 2-fixed base plate, 21-mounting screw, 3-pressure plate, 31-adjusting screw, 4-tooling plate, 41-mounting clamping hole, 42-annular boss, 43-clamping gap, 44-first locking block, 45-second locking block, 46-notch, 47-first locking hole, 5-locking screw, 6-positioning protrusion. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0023] refer to Figure 1 and Figure 2 This utility model discloses a slow wire EDM fixture for clamping a cam 1 to be processed, in order to process the keyway 103 of the cam 1. The cam 1 to be processed has a cylindrical clamping end 11, and the cam 1 to be processed has an axial shaft hole. The keyway 103 to be processed is located on the side wall of the shaft hole. The end face of the clamping end 11 is also provided with four end holes, which can be used as positioning holes for processing the keyway 103. The two end holes near the keyway 103 are symmetrically arranged relative to the keyway 103.

[0024] refer to Figures 1 to 6 The slow wire EDM tooling of this utility model includes: a fixed base plate 2, a clamping plate 3, and a tooling plate 4; The fixed base plate 2 is used for fixed installation on the cutting machine tool. The clamping plate 3 is fixed on the fixed base plate 2. The clamping plate 3 and the fixed base plate 2 have a clamping gap 43 at their ends. The edge of the tooling plate 4 is clamped and fixed within the clamping gap 43. Specifically, the fixed base plate 2 has a lower clamping groove at its end, and the clamping plate 3 has a lower clamping groove at its end. The upper clamping groove and the lower clamping groove are aligned to form the clamping gap 43. Both the fixed base plate 2 and the clamping plate 3 have adjusting locking holes. The adjusting locking holes on the fixed base plate 2 and the clamping plate 3 are aligned. Adjusting screws 31 are provided in the adjusting locking holes, and the adjusting screws 31 lock the clamping plate 3 onto the fixed base plate 2. There are three adjusting screws 31. By selectively tightening the adjusting screws 31, the tightening degree of the adjusting screws 31 can be slightly adjusted, thereby adjusting the level of the tooling plate 4. After the tooling plate 4 is clamped with the clamping gap 43, the level of the tooling plate 4 can be corrected by using a micrometer to ensure that the tooling plate 4 is installed horizontally.

[0025] The tooling plate 4 is provided with a mounting clamping hole 41. A first locking block 44 and a second locking block 45 are also fixedly installed on the edge of the tooling plate 4. There is a locking gap between the two locking blocks. The locking gap extends to the edge of the mounting clamping hole 41 and communicates with the mounting clamping hole 41. The first locking block 44 and the second locking block 45 are respectively provided with a first locking hole 47 and a second locking hole arranged coaxially. The axes of the first locking hole 47 and the second locking hole are both perpendicular to the axis of the mounting clamping hole 41. The first locking hole 47 passes through the first locking block 44, and a locking screw 5 is provided in the first locking hole 47. The end of the locking screw 5 extends into the second locking hole.

[0026] The working process of this slow wire EDM fixture is as follows: the fixture plate 4 is horizontally clamped on the cutting machine tool through the fixed base plate 2 and the clamping plate 3; the clamping end 11 of the cam to be processed 1 is inserted into the installation clamping hole 41, and then the cam to be processed 1 is rotated to adjust the circumferential installation angle of the cam to be processed 1. After the installation angle of the cam to be processed 1 is adjusted, the locking screw 5 is tightened to reduce the locking gap, which will reduce the inner diameter of the installation clamping hole 41, thereby completing the clamping process of the cam 1.

[0027] The clamping hole 41 of this slow wire EDM fixture can accurately clamp the cam 1 to be processed. The clamping hole 41 and the outer ring of the cam 1 are in surface contact. The clamping hole 41 effectively reduces the runout error of the cam 1 and improves the processing accuracy of the cam 1. During the cam 1 replacement process, only the locking screw 5 needs to be loosened and tightened. This fixture can improve the clamping and processing efficiency of the cam 1, and it has the advantages of simple structure, easy manufacturing and low cost.

[0028] In a preferred embodiment, an annular boss 42 is further provided inside the mounting clamping hole 41. The annular boss 42 of the mounting clamping hole 41 is provided with a notch 46. The annular boss 42 is used to position the end face of the clamping end 11 of the cam 1 to be processed, and the notch 46 is used to avoid obstructing the keyway 103 to be processed, so as to facilitate the wire cutting of the keyway 103.

[0029] In a preferred embodiment, at least two positioning protrusions 6 are fixedly provided on the annular boss 42. In this embodiment, there are two positioning protrusions 6, and the line connecting the centers of the positioning protrusions 6 is parallel to the bottom surface of the keyway 103 to be processed. When the cam 1 to be processed is installed into the mounting clamping hole 41, the two positioning protrusions 6 are embedded in two of the four positioning holes 12 on the end face of the clamping end 11, which can complete the circumferential positioning of the cam 1 to be processed, ensure accurate installation angle, and further improve the clamping accuracy of the cam 1.

[0030] The positioning protrusion 6 can be a hemispherical structure or a frustum-shaped boss structure. When the positioning protrusion 6 is a hemispherical structure, its diameter is equal to the diameter of the positioning hole 12 on the end face of the cam 1 to be processed. When the positioning protrusion 6 is a frustum-shaped boss structure, its bottom diameter is equal to the diameter of the positioning hole 12 on the end face of the cam 1 to be processed.

[0031] In a preferred embodiment, the mounting screw 21, the adjusting screw 31, and the locking screw 5 are all internal hexagon screws.

[0032] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A slow wire EDM fixture, characterized in that, The tool for clamping the cam (1) to be machined for machining the keyway (103) includes: a fixed base plate (2), a clamping plate (3), and a tooling plate (4). The fixed base plate (2) is used to be fixedly installed on the cutting machine tool. The clamping plate (3) is fixed on the fixed base plate (2). The clamping plate (3) and the fixed base plate (2) have a clamping gap (43) at their ends. The tooling plate (4) is clamped and fixed within the clamping gap (43) at its edge. The tooling plate (4) is provided with mounting clamping holes (41), and a first locking block (44) and a second locking block (45) are fixedly installed on the edge of the tooling plate (4). There is a locking gap between the two locking blocks, and the locking gap extends to the edge of the mounting clamping hole (41) and communicates with the mounting clamping hole (41). The first locking block (44) and the second locking block (45) are respectively provided with a first locking hole (47) and a second locking hole arranged coaxially. The axes of the first locking hole (47) and the second locking hole are perpendicular to the axis of the mounting clamping hole (41). The first locking hole (47) passes through the first locking block (44). A locking screw (5) is provided in the first locking hole (47). The end of the locking screw (5) extends into the second locking hole.

2. The slow wire EDM fixture according to claim 1, characterized in that, The mounting clamping hole (41) is also provided with an annular boss (42).

3. The slow wire EDM fixture according to claim 2, characterized in that, The mounting clamping hole (41) has a notch (46) on the annular boss (42).

4. The slow wire EDM fixture according to claim 2, characterized in that, At least two positioning protrusions (6) are fixedly provided on the annular boss (42).

5. The slow wire EDM fixture according to claim 4, characterized in that, The positioning protrusions (6) are all hemispherical structures, and the diameter of the positioning protrusions (6) is equal to the diameter of the positioning hole (12) on the end face of the cam (1) to be processed.

6. The slow wire EDM fixture according to claim 4, characterized in that, The positioning protrusion (6) is a frustum structure, and the bottom diameter of the positioning protrusion (6) is equal to the diameter of the positioning hole (12) on the end face of the cam (1) to be processed.

7. The slow wire EDM fixture according to claim 1, characterized in that, The fixed base plate (2) has a lower clamping groove at its end, and the clamping plate (3) has a lower clamping groove at its end. The lower clamping groove and the lower clamping groove are aligned to form the clamping gap (43).

8. The slow wire EDM fixture according to claim 1, characterized in that, The fixed base plate (2) is provided with multiple mounting and locking holes, and mounting screws (21) are provided in the mounting and locking holes. The mounting screws (21) will retract the fixed base plate (2) and install it on the cutting machine tool.

9. A slow wire EDM fixture according to claim 8, characterized in that, The fixed base plate (2) and the clamping plate (3) are both provided with adjustment locking holes. The adjustment locking holes on the fixed base plate (2) are aligned with the adjustment locking holes on the clamping plate (3). An adjustment screw (31) is provided in the adjustment locking hole. The adjustment screw (31) locks the clamping plate (3) onto the fixed base plate (2).

10. A slow wire EDM fixture according to claim 9, characterized in that, The mounting screw (21), adjusting screw (31), and locking screw (5) are all internal hex screws.

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