CN220093311U - Clamp for spark-perforating on the trailing edge of a cast part - Google Patents

Abstract

The utility model relates to a fixture for spark-perforating the trailing edge of a casting, comprising: the wire electrode guide piece is provided with a plurality of through holes which are used for guiding the wire electrode used for electric spark punching and penetrate through the wire electrode guide piece; and a fixed holder having a holder body and a through opening penetrating the holder body from an upper end surface of the holder body, the through opening being for accommodating the wire electrode guide, wherein a trailing edge of the casting is divided into a plurality of segments, and a jig for performing electric spark drilling on the trailing edge of the casting is provided on each segment when electric spark drilling is performed on the trailing edge of the casting, so that a plurality of through holes in the wire electrode guide are abutted on the trailing edge of the casting, and electric spark drilling is performed on the trailing edge of the casting by the wire electrode guided by the plurality of through holes. Thus, the tail edge of the casting can be easily perforated, the accuracy and the working efficiency of perforation on the tail edge of the casting are improved, and meanwhile, the production of the casting with scratch is avoided.

Description

Clamp for spark-perforating on the trailing edge of a cast part

Technical Field

The present utility model relates to the field of casting, and more particularly to a fixture for spark-perforating the trailing edge of a casting.

Background

Blades such as gas turbines are components having a cavity therein, and it is often necessary to provide a plurality of holes in the trailing edge of the blade by an Electrical Discharge Machining (EDM) process to communicate with the cavity inside the blade, thereby dissipating heat from the blade through the plurality of holes provided in the trailing edge.

During the casting operation of the blade, the trailing edge of the blade will inevitably deform. At this time, if the trailing edge of the blade is perforated by an Electric Discharge Machining (EDM) process, the position of the hole needs to be adjusted according to the casting condition of the blade to ensure that the hole can be perforated on the trailing edge of the blade and can enter the cavity in the blade, and communicate with the cavity in the blade to radiate heat from the blade.

In the prior art, when the trailing edge of the blade is deformed, the position of each hole can be adjusted by naked eyes, which results in low working efficiency and cannot ensure that the hole can enter the cavity in the blade. In addition, when holes are not accurately punched in the trailing edge of the blade, scratches are generated on the blade.

Disclosure of Invention

In view of the state of the art and the shortcomings, it is an object of the present utility model to provide a fixture for spark-perforating the trailing edge of a casting. In the utility model, the tail edge of the casting is divided into a plurality of sections, each section is provided with a clamp, each clamp consists of a wire electrode guide piece and a clamping fixing piece, the wire electrode guide piece is provided with a plurality of through holes penetrating through the wire electrode guide piece, the wire electrode guide piece is fixed to the tail edge of the casting by the clamping fixing piece, the tail edge of the casting is divided into a plurality of sections, each section is approximately straight, so that the plurality of through holes are ensured to be on the tail edge of the casting, and therefore, the wire electrode used in an electric spark process is guided to the tail edge of the casting through the plurality of through holes, so that the tail edge of the casting can be easily perforated, the perforating precision and the working efficiency on the tail edge of the casting are improved, and meanwhile, the occurrence of the casting with scratch is avoided.

According to an embodiment of the present utility model, there is provided a jig for performing spark-perforating on a trailing edge of a casting, including: the wire electrode guide piece is provided with a plurality of through holes which are used for guiding the wire electrode used for electric spark punching and penetrate through the wire electrode guide piece; and a fixed holder having a holder body and a through opening penetrating the holder body from an upper end surface of the holder body, the through opening being for accommodating the wire electrode guide, wherein a trailing edge of the casting is divided into a plurality of segments, and a jig for performing electric spark drilling on the trailing edge of the casting is provided on each segment when electric spark drilling is performed on the trailing edge of the casting, so that a plurality of through holes in the wire electrode guide are abutted on the trailing edge of the casting, and electric spark drilling is performed on the trailing edge of the casting by the wire electrode guided by the plurality of through holes.

Through the mode, the electrode wire used in the electric spark process can be guided to the tail edge of the casting through the through holes, so that the tail edge of the casting can be easily perforated, the accuracy and the working efficiency of perforation on the tail edge of the casting are improved, and meanwhile, the production of the casting with scratches is avoided.

In a jig for performing spark-erosion drilling on a trailing edge of a casting according to an embodiment of the present utility model, a wire guide includes: a first body portion having an upper end face, a lower end face, a first side, and a second side, wherein the first body portion has a first width between the first side and the second side; a second body portion integrally formed with the first body portion on an upper end surface of the first body portion, the second body portion having an upper end surface, a first side, and a second side, wherein the second body portion has a second width between the first side of the second body portion and the second side of the second body portion, the second width being greater than the first width, and a distance from the first side of the second body portion to the first side of the first body portion is equal to a distance from the second side of the second body portion to the second side of the first body portion; and a holding portion provided on a lower end face of the first body portion, which can be used to hold the first body portion on a trailing edge of the casting, wherein a plurality of through holes penetrate the second body portion and the first body portion from an upper end face of the second body portion up to the lower end face of the first body portion.

In this way, a specific structure of the wire guide is provided.

In the jig for performing spark-erosion drilling on a trailing edge of a casting according to an embodiment of the present utility model, the wire guide further includes: the notch penetrates the second body portion and has an opening outward from the second side of the second body portion.

By means of the recess, the wire guide can be positioned accurately to the fixed clamp.

In the jig for spark-perforating a trailing edge of a casting according to an embodiment of the utility model, the clamping body further has a first side and a second side, and the fixed clamp further includes: the first clamping part is arranged on the first side of the clamping body; and a second clamping portion disposed on a second side of the clamping body opposite the first clamping portion, wherein the clamping body is capable of being clamped on the trailing edge of the casting by the first and second clamping portions.

In this way, a specific structure of the fixing clip is provided.

In the clamp for performing electric spark punching on the trailing edge of the casting according to the embodiment of the utility model, the first clamping part is a static clamping part which cannot move, the second clamping part is a movable clamping part, and the clamping body is clamped on the trailing edge of the casting by moving the second clamping part to the first clamping part.

In this way, a specific arrangement of the first clamping portion and the second clamping portion is provided.

In the jig for performing spark-erosion drilling on a trailing edge of a casting according to an embodiment of the present utility model, the second clamping portion includes: a stud having a first end and a second end; the ball accommodating part is arranged at the first end of the stud, wherein balls matched with the ball accommodating part in size are accommodated in the ball accommodating part, and when the first clamping part and the second clamping part clamp the tail edge of the casting, the balls are contacted with the tail edge of the casting; the knob and the stud are integrally formed at the second end of the stud, and the stud drives the ball accommodating part accommodating the ball to be close to or far from the first clamping part by rotating the knob; the screw thread is arranged on the stud; and a stopper which is sleeved on the stud between the ball accommodating part and the knob and can be engaged with the screw thread to prevent the rotation of the stud.

Through the ball of holding in ball holding portion, can realize the close contact of second clamping part and the trailing edge of foundry goods, through setting up the stopper, can make anchor clamps more firmly centre gripping on the trailing edge of foundry goods, guaranteed the accuracy of punching.

In the jig for performing spark-erosion drilling on a trailing edge of a casting according to an embodiment of the present utility model, the fixing jig further includes: a positioning part which is arranged on the upper end surface of the clamping body and can be clamped with the notch of the wire electrode guide to position the wire electrode guide at a preset position; and a fixing portion provided on an upper end surface of the clamping body, capable of pressing the second body portion onto the upper end surface of the clamping body from above the upper end surface of the second body portion at a second side of the second body portion to fix the wire electrode guide to the fixing clamp.

By providing the positioning portion and the fixing portion, the wire electrode guide can be more accurately and firmly fixed to the fixing clip.

In the jig for performing spark-erosion drilling on a trailing edge of a casting according to an embodiment of the present utility model, the fixing portion includes: the pressing plate is provided with a pressing plate body and a pressing plate protruding part, wherein the pressing plate body is provided with a first end and an upper end face, the pressing plate protruding part protrudes from the pressing plate body at the first end of the pressing plate body, and the thickness of the pressing plate protruding part is smaller than that of the pressing plate body; and an elastic rotating part arranged in the upper end surface of the pressing plate body, wherein the pressing plate can be driven to move up and down on the upper end surface of the clamping body by rotating the elastic rotating part, and when the electrode wire guide piece is fixed to the fixed clamping piece by the fixing part, the pressing plate protruding part presses the upper end surface of the second body part from the upper part of the upper end surface of the clamping body.

In this way, a specific form of the fixing portion is provided.

In the jig for spark-perforating a trailing edge of a casting according to an embodiment of the utility model, the clamping body further has a third side and a fourth side, the third side and the fourth side being between the first side of the clamping body and the second side of the clamping body, and the third side and the fourth side being opposite, wherein the fixing the clamping member further comprises: a first positioning member disposed on the third side; and a second positioning member provided on the fourth side, wherein the first positioning member and the second positioning member are configured to position adjacent jigs for performing spark-perforating on the trailing edge of the casting when a plurality of jigs for performing spark-perforating on the trailing edge of the casting are arranged on the trailing edge of the casting.

By providing the positioning members on the third side and the fourth side of the jig, positioning between the respective jigs when a plurality of jigs are mounted on the trailing edge of the casting can be ensured.

In the jig for performing spark-erosion drilling on the trailing edge of a casting according to the embodiment of the utility model, the plurality of through holes have a chamfer inclined from the upper end face of the second body portion toward the inside of the second body portion in the second body portion so that the radius of the plurality of through holes in the upper end face of the second body portion is larger than the radius of the plurality of through holes in the inside of the first body portion and the second body portion.

By the mode, the electrode wire can enter the through hole more easily.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 illustrates a block diagram of a fixture for spark-perforating a trailing edge of a casting in accordance with an embodiment of the present utility model.

Fig. 2 shows a specific block diagram of a wire guide in a fixture for spark-perforating the trailing edge of a casting, in accordance with an embodiment of the present utility model.

Fig. 3 shows a specific block diagram of the fixing clip in the clip for spark-perforating the trailing edge of a casting according to an embodiment of the present utility model.

Fig. 4 shows a state in which a jig for performing spark-erosion drilling on the trailing edge of a casting is clamped to the trailing edge of the casting according to an embodiment of the present utility model.

FIG. 5 illustrates a layout of a fixture for spark-perforating a trailing edge of a casting on the trailing edge in accordance with an embodiment of the present utility model when spark-perforating the trailing edge of the casting.

Wherein, the reference numerals are as follows:

1: clamp for spark-perforating on the trailing edge of a cast part

10: wire electrode guide

20: fixing clamping piece

H: through hole

30. 301, 302: trailing edge of casting

101: a first body part

1011: an upper end surface of the first body part

1013: lower end face of the first body part

1015: a first side of the first body part

1017: a second side of the first body part

103: a second body part

1031: upper end face of the second body part

1033: first side of the second body part

1035: a second side of the second body part

105: holding part

1051. 1053: claw portion

107: recess (es)

201: clamping body

203: first clamping part

205: second clamping part

2011: first side of the clamping body

2013: second side of the clamping body

2015: upper end face of clamping body

2019: third side of the clamping body

2021: fourth side of the clamping body

2017: through openings

2051: stud bolt

2053: ball accommodating portion

2055: knob

2057: stop piece

207: positioning part

209: fixing part

2091: pressing plate

2093: elastic rotating part

211: first positioning piece

213: and a second positioning piece.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

The utility model provides a clamp for performing electric spark perforation on the tail edge of a casting. Fig. 1 shows a block diagram of a jig for spark-perforating on a trailing edge of a casting according to an embodiment of the present utility model, fig. 2 shows a specific structural view of a wire guide in the jig for spark-perforating on a trailing edge of a casting according to an embodiment of the present utility model, fig. 3 shows a specific structural view of a fixing clamp in the jig for spark-perforating on a trailing edge of a casting according to an embodiment of the present utility model, fig. 4 shows a state that the jig for spark-perforating on a trailing edge of a casting according to an embodiment of the present utility model clamps on a trailing edge of a casting, and the jig for spark-perforating on a trailing edge of a casting according to the present utility model is described below with reference to fig. 1 to 4.

For ease of understanding, a brief description of the spark-erosion process will first be provided before describing the fixture for spark-erosion drilling on the trailing edge of a casting according to the present utility model. Spark-erosion drilling is a process that utilizes a pulsed discharge between a tool electrode and a workpiece electrode to create small holes in a workpiece, which is one of the most widespread applications in spark-erosion machining, and is commonly used to machine holes (e.g., round holes, square holes, polygonal holes, profiled holes), curved holes, micro-holes, etc., such as cold stamping dies, wire drawing dies, extrusion dies, nozzles, various holes and small holes in spinning heads.

As shown in fig. 1 to 4, the jig 1 for spark-perforating on the trailing edge of a casting according to the present utility model includes a wire guide 10 and a fixing clip 20.

The wire guide 10 is provided with a plurality of through holes H for guiding the wire used for performing spark-erosion drilling, and the plurality of through holes H penetrate the wire guide 10.

The fixing clip 20 is used to fix the wire electrode guide 10 to the trailing edge 30 of the casting such that the plurality of through holes H of the wire electrode guide 10 rest against the trailing edge 30 of the casting.

Wherein the trailing edge 30 of the casting is divided into a plurality of segments, and when performing spark-perforating on the trailing edge 30 of the casting, the jig 1 is provided on each segment of the trailing edge 30 of the casting, and the trailing edge 30 of the casting is spark-perforated by the electrode wires guided in the plurality of through holes H. In the present utility model, the casting may be a gas turbine blade, but the present utility model is not limited thereto.

Specifically, as shown in fig. 2, the wire electrode guide 10 includes a first body portion 101, a second body portion 103, and a holding portion 105.

The first body portion 101 has an upper end face 1011, a lower end face 1013, a first side 1015, and a second side 1017. The first side 1015 and the second side 1017 are opposite each other and have a first width therebetween.

The second body 103 is integrally formed with the first body 101 on the upper end surface 1011 of the first body 101. The present utility model is not limited thereto, and the second body 103 may be formed on the upper end surface 1011 of the first body 101 separately from the first body 101, that is, the second body 103 and the first body 101 are not integrally formed. When the second body portion 103 is formed separately from the first body portion 101, the second body portion 103 may be fixed to the upper end face 1011 of the first body portion 101 by a fixing member such as an adhesive.

The second body portion 103 has an upper end surface 1031, a first side 1033, and a second side 1035. The first side 1033 and the second side 1035 are opposite each other with a width therebetween that is a second width, wherein the second width is greater than the first width. In addition, the distance from the first side 1033 to the first side 1015 is equal to the distance from the second side 1017 to the second side 1035.

The holding portion 105 is provided on the lower end surface 1013 of the first body portion 101, which can be used to hold the first body portion 101 on the trailing edge of the casting.

As shown in fig. 2, the holding portion 105 includes a claw portion 1051 and a claw portion 1053 provided on the lower end surface 1013 of the first body portion 101, respectively. The claw portion 1051 is provided at the front end of the lower end surface 1013 of the first body portion 101 as viewed in fig. 2, and the claw portion 1053 is provided at the rear end of the lower end surface 1013 of the first body portion 101 as viewed in fig. 2. Each claw portion includes two claws arranged in an out-splayed manner with respect to the lower end surface 1013 of the first body portion 101, and the width of the gap between the two claws gradually widens from the lower end surface 1013 of the first body portion 101 toward the free end portions of the claws, so that the trailing edge of the casting can be easily gripped in the gap between the two claws of the claw portion.

In the wire guide 10, a plurality of through holes H penetrate from the upper end surface 1031 of the second body portion 103 to the lower end surface 1013 of the first body portion 101 through the second body portion 103 and the first body portion 101. In the present utility model, the size and density of the through holes may be set according to the specific conditions of the trailing edge of the casting.

In order to facilitate the wire electrode passing smoothly through the through hole from the upper end surface 1031 of the second body portion 103 to the lower end surface 1013 of the first body portion 101, the plurality of through holes H may be provided with a chamfer inclined from the upper end surface 1031 of the second body portion 103 into the second body portion 103 in the second body portion 103, i.e., a radius of the plurality of through holes H in the upper end surface 1031 of the second body portion 103 is made larger than a radius of the plurality of through holes H in the inside of the first body portion 101 and the second body portion 103.

As shown in fig. 2, the wire guide 10 may further include a notch 107. The recess 107 extends through the second body portion 103 and has an opening that is outward from the second side 1035 of the second body portion 103, e.g., the recess 107 may be a C-shaped opening near an edge of the second side 1035 of the second body portion 103, so that a positioning portion of the fixed clamp 20, which will be described later, slides into the C-shaped opening from the second side of the second body 103 to position the wire guide 10 when the wire guide 10 is mounted to the fixed clamp 20. In the present utility model, the shape of the recess is not limited thereto, and may be any other shape as long as it can be combined with a positioning portion of a fixing clip to be described later to position the wire electrode guide.

As shown in fig. 3, the fixed clamp 20 includes a clamp body 201, a first clamp portion 203, and a second clamp portion 205.

The clamping body 201 has a first side 2011, a second side 2013, an upper end surface 2015 and a through opening 2017 extending from the upper end surface 2015 through the clamping body 201, the through opening 2017 for receiving the wire electrode guide 10.

The first clamping portion 203 is disposed on a first side 2011 of the clamping body 201. Specifically, the first clamping portion 203 may be a part of the clamping body 201 and integrally formed with the clamping body 201. A gasket P is provided at an end of the first clamping portion 203 opposite to the second clamping portion 205 to play a cushioning role and bring the first clamping portion 203 into close contact with the trailing edge of the casting when the first clamping portion 203 clamps the trailing edge of the casting.

The second clamping portion 205 is disposed on the second side 2013 of the clamping body 201 opposite the first clamping portion 203. The clamping body 201 can be clamped on the trailing edge of the casting by means of a first clamping portion 203 and a second clamping portion 205.

As shown in fig. 3, the second grip 205 includes a stud 2051, a ball receiver 2053, a knob 2055, threads (not shown in fig. 3), and a stop 2057.

The stud 2051 has a first end and a second end. The ball receiving portion 2053 is provided at a first end of the stud 2051, and a ball B having a size matching that of the ball receiving portion 2053 is received in the ball receiving portion 2053 so as to be freely rotatable in the ball receiving portion 2053 without being rolled out of the ball receiving portion 2053. When the first clamping portion 203 and the second clamping portion 205 clamp the trailing edge of the casting, the balls B are in contact with the trailing edge of the casting, thereby achieving close contact of the second clamping portion 205 with the trailing edge of the casting.

A knob 2055 is integrally formed with the stud 2051 at a second end of the stud 2051, and by rotating the knob 2055, the stud 2051 can move the ball receiving portion 2053 in which the balls B are received toward or away from the first clamping portion 203.

Threads are provided between the first and second ends of the plug 2051. A stop 2057 is provided on the stud 2051 between the ball receiving portion 2053 and the knob 2055 that is capable of engaging threads on the stud 2051 to prevent rotation of the stud 2051. As shown in fig. 3, the stop 2057 may be, for example, a gear that, when rotated against the second side 2013 of the clamp body 201, will not move the stud 2051 in a direction toward or away from the first clamp portion 203 by rotating the knob 2055.

In the embodiment of the utility model shown in fig. 3, the first clamping part 203 may be a stationary clamping part that cannot be moved, the second clamping part 205 may be a movable clamping part, and the clamping body 201 is clamped on the trailing edge of the casting by moving the second clamping part 205 towards the first clamping part 203. However, the present utility model is not limited thereto, and the first clamping portion may be a dynamic clamping portion, and the second clamping portion may be a static clamping portion, and the clamping body may be clamped on the trailing edge of the casting by moving the first clamping portion toward the second clamping portion. The first clamping portion and the second clamping portion may be movable clamping portions, and the clamping body may be clamped to the trailing edge of the casting by moving one or both of the first clamping portion and the second clamping portion.

The fixed clamp 20 may also include a detent 207 and a securing portion 209.

The positioning portion 207 is provided on the upper end surface 2015 of the clamp body 201, and is capable of engaging with the notch 107 of the wire guide 10 to position the wire guide 10 at a predetermined position. For example, when the wire guide 10 is mounted to the fixing clip 20, the positioning portion 207 slides into the recess 107, which is, for example, a C-shaped opening, from the second side of the second body 103, thereby positioning the wire guide 10. In fig. 3, the positioning portion 207 is shown as a thin stub, but the present utility model is not limited thereto, and any member that can slide into the recess to perform a positioning function may be used as the positioning portion.

The fixing portion 209 is provided on the upper end surface 2015 of the clamping body 201, and is capable of pressing the second body portion 103 onto the upper end surface 2015 of the clamping body 201 from above the upper end surface 1031 of the second body portion 103 at the second side 1035 of the second body portion 103, thereby fixing the wire electrode guide 10 to the fixed clamping member 20.

As shown in fig. 3, the fixing portion 209 includes a pressing plate 2091 and an elastic rotation portion 2093.

The platen 2091 has a platen body having a first end and an upper end face, and a platen projection projecting from the platen body at the first end of the platen body. The thickness of the pressing plate protruding part is smaller than that of the pressing plate body.

The elastic rotation portion 2093 is disposed in the platen body of the platen 2091, specifically, disposed in the upper end surface of the platen body, and the platen 2091 can be driven to move up and down on the upper end surface 2015 of the clamping body 201 by rotating the elastic rotation portion 2093, and the platen 2091 can rotate in the upper end surface 2015 of the clamping body 201 when the elastic rotation portion 2093 is rotated to release the elastic pressing of the platen 2091. When the fixing portion 209 fixes the wire guide 10 to the fixing clip 20, the pressing plate protruding portion presses the upper end face 1031 of the second body portion 103 from above the upper end face 2015 of the clip body 201. The elastic rotation portion 2093 may be implemented by providing a spring mechanism in the platen body of the platen 2091.

As shown in fig. 3, the fixing clip 20 may further include a first positioning member 211 and a second positioning member 213, wherein the second positioning member 213 is not shown in fig. 3 due to a shielding relationship, and reference may be made to the second positioning member 213 in fig. 5 described below for convenience of understanding.

The clamp body 201 also has a third side 2019 and a fourth side 2021, the third side 2019 and the fourth side 2021 being between the first side 2011 and the second side 2013 of the clamp body 201, and the third side 2019 and the fourth side 2021 being opposite.

The first positioning member 211 is disposed on the third side 2019 and the second positioning member 213 is disposed on the fourth side 2021. The first positioning member 211 and the second positioning member 213 are used to position the adjacent jigs 1 when the plurality of jigs 1 are arranged on the trailing edge of the casting.

The structure of the jig for performing electric spark perforation on the trailing edge of the casting is specifically described above, by which the wire electrode used in the electric spark process can be guided to the trailing edge of the casting through the plurality of through holes, so that perforation can be easily performed on the trailing edge of the casting, the accuracy and working efficiency of perforation on the trailing edge of the casting are improved, and meanwhile, the occurrence of the casting with scratches is avoided.

FIG. 5 illustrates a layout of a fixture for spark-perforating a trailing edge of a casting on the trailing edge in accordance with an embodiment of the present utility model when spark-perforating the trailing edge of the casting. For a better understanding of the technical solution of the present utility model, a specific description will be given below with reference to fig. 4 and 5 of how to use the jig for spark-perforating a trailing edge of a casting according to the present utility model when spark-perforating the trailing edge of the casting. It should be noted here that the components that support the trailing edge of the casting on the left and right sides in fig. 5 are not part of the utility model and are not described too much in order to avoid over-description that may obscure the utility model. For simplicity, the fixture 1 for spark-perforating the trailing edge of the casting will be hereinafter simply referred to as "fixture 1".

When it is desired to perform spark-perforating on the trailing edge of a casting, such as a blade of a gas turbine, as shown in fig. 5, the trailing edge of the casting may be divided into sections, with each section having a clamp 1 positioned between adjacent clamps 1 by a first positioning member 211 on a third side and a second positioning member 213 on a fourth side of the clamp 1.

Specifically, for each clip 1, as shown in fig. 4, the wire guide 10 is inserted into the fixing clip 20 from the through opening 2017 of the fixing clip 20, and the positioning portion 207 of the fixing clip 20 is engaged in the recess 107 of the wire guide 10 to position the wire guide 10. After positioning, the wire guide 10 is fixed to the fixing clip 20 with the fixing portion 209. The assembled jig 1 is clamped to a specific position of the trailing edge 30 of the casting, specifically, the trailing edge 30 of the casting is clamped in a gap between two claws of the holding portion 105, the trailing edge 30 of the casting is clamped from both sides with the first clamping portion 203 and the second clamping portion 205, and the knob 2055 is rotated to clamp the trailing edge 30 of the casting between the first clamping portion 203 and the second clamping portion 205. The stop 2057 is rotated to lock the clip 1 to the trailing edge 30 of the casting.

An example of spark-perforating the trailing edges of two parallel castings is shown in fig. 5, where the trailing edges of two parallel castings are referred to as a first trailing edge 301 and a second trailing edge 302, respectively, for convenience.

As shown in fig. 5, the first trailing edge 301 and the second trailing edge 302 are each divided into nine sections, the jigs 1 are respectively provided on four sections of the first trailing edge 301 spaced apart from each other, and the jigs 1 are respectively provided on five sections of the second trailing edge 302 spaced apart from each other, where the four sections of the first trailing edge 301 spaced apart from each other are in a complementary relationship with the five sections of the second trailing edge 302 spaced apart from each other. That is, the five segments of the first trailing edge 301 where the clip 1 is not provided and the five segments of the second trailing edge 302 where the clip 1 is provided are completely corresponding in position. Thus, after the first tail edge 301 uses four clamps 1 and the second tail edge 302 uses five clamps 1 to complete the spark-erosion drilling, the four clamps 1 on the first tail edge 301 and the five clamps 1 on the second tail edge 302 can be interchanged integrally, thereby achieving uniform drilling on the first tail edge 301 and the second tail edge 302.

In the utility model, the tail edge of the casting is divided into a plurality of sections, each section is provided with a clamp, each clamp consists of a wire electrode guide piece and a clamping fixing piece, a plurality of through holes penetrating the wire electrode guide piece are arranged in the wire electrode guide piece, the wire electrode guide piece is fixed to the tail edge of the casting by the clamping fixing pieces, and the tail edge of the casting is divided into a plurality of sections, each section is approximately straight, so that the plurality of through holes are ensured to be on the tail edge of the casting, and therefore, the wire electrode used in an electric spark process is guided to the tail edge through the plurality of through holes, and can be easily perforated on the tail edge of the casting, thereby improving the perforating precision and working efficiency on the tail edge of the casting, and simultaneously avoiding the generation of the casting with scratches.

In the foregoing embodiments of the present utility model, the descriptions of the embodiments are emphasized, and in part, reference is made to the related descriptions of other embodiments.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. A fixture (1) for spark-perforating the trailing edge of a casting, characterized in that it comprises:

a wire guide (10) provided with a plurality of through holes (H) for guiding a wire used for the spark-erosion drilling, the plurality of through holes (H) penetrating the wire guide (10); and

a fixed clamp (20) having a clamp body (201) and a through opening (2017) penetrating the clamp body (201) from an upper end face (2015) of the clamp body (201), the through opening (2017) being for receiving the wire electrode guide (10),

wherein the trailing edge (30, 301, 302) of the casting is divided into a plurality of segments, and when spark-perforating is performed on the trailing edge (30, 301, 302) of the casting, the jig (1) for spark-perforating on the trailing edge of the casting is provided on each segment such that the plurality of through holes (H) in the wire electrode guide (10) abut against the trailing edge (30, 301, 302) of the casting, and spark-perforating is performed on the trailing edge (30, 301, 302) of the casting by the wire electrode guided by the plurality of through holes (H).

2. The fixture (1) for spark-perforating on the trailing edge of castings according to claim 1, wherein the wire guide (10) comprises:

a first body portion (101) having an upper end face (1011), a lower end face (1013), a first side (1015) and a second side (1017), wherein the first body portion (101) has a first width between the first side (1015) and the second side (1017);

a second body portion (103) integrally formed with the first body portion (101) on the upper end face (1011) of the first body portion (101), the second body portion (103) having an upper end face (1031), a first side (1033), and a second side (1035), wherein the second body portion (103) has a second width between the first side (1033) of the second body portion (103) and the second side (1035) of the second body portion (103), the second width is greater than the first width, and a distance from the first side (1033) of the second body portion (103) to the first side (1015) of the first body portion (101) is equal to a distance from the second side (1035) of the second body portion (103) to the second side (1017) of the first body portion (101); and

a holding portion (105) provided on the lower end surface (1013) of the first body portion (101) and operable to hold the first body portion (101) on a trailing edge (30, 301, 302) of the casting,

wherein the plurality of through holes (H) penetrate from the upper end surface (1031) of the second body part (103) through the second body part (103) and the first body part (101) to the lower end surface (1013) of the first body part (101).

3. The fixture (1) for spark-perforating on the trailing edge of castings according to claim 2, wherein the wire guide (10) further comprises:

a recess (107) extending through the second body portion (103) and having an opening outward from the second side (1035) of the second body portion (103).

4. A clamp (1) for spark-perforating on the trailing edge of castings according to claim 3, characterized in that the clamping body (201) further has a first side (2011) and a second side (2013), the fixed clamp (20) further comprising:

a first clamping portion (203) provided on the first side (2011) of the clamping body (201); and

a second clamping portion (205) provided on the second side (2013) of the clamping body (201) opposite to the first clamping portion (203),

wherein the clamping body (201) can be clamped on the trailing edge (30, 301, 302) of the casting by means of the first clamping part (203) and the second clamping part (205).

5. The jig (1) for spark-perforating on the trailing edge of castings according to claim 4, wherein,

the first clamping part (203) is an immovable static clamping part, the second clamping part (205) is a movable dynamic clamping part, and the second clamping part (205) is moved to the first clamping part (203) to clamp the clamping body (201) on the tail edge (30, 301, 302) of the casting.

6. The clamp (1) for spark-perforating a trailing edge of a casting according to claim 5, characterized in that the second clamping portion (205) comprises:

a stud (2051) having a first end and a second end;

a ball receiving portion (2053) provided at the first end of the stud (2051), wherein a ball (B) having a size matching the ball receiving portion (2053) is received in the ball receiving portion (2053), the ball (B) being in contact with the trailing edge (30, 301, 302) of the casting when the first and second clamping portions (203, 205) clamp the trailing edge (30, 301, 302) of the casting;

a knob (2055) integrally formed with the stud (2051) at the second end of the stud (2051), wherein by rotating the knob (2055), the stud (2051) brings the ball receiving portion (2053) in which the balls (B) are received closer to or farther from the first clamping portion (203);

threads provided on the stud (2051); and

and a stopper (2057) which is fitted over the stud (2051) between the ball receiving portion (2053) and the knob (2055) and is capable of engaging with the screw thread to prevent rotation of the stud (2051).

7. The clamp (1) for spark-perforating the trailing edge of castings according to claim 4, wherein the fixed clamp (20) further comprises:

a positioning portion (207) provided on the upper end surface (2015) of the clamping body (201) and capable of being engaged with the recess (107) of the wire guide (10) to position the wire guide (10) at a predetermined position; and

a fixing portion (209) disposed on the upper end face (2015) of the clamping body (201), and capable of pressing the second body portion (103) onto the upper end face (2015) of the clamping body (201) from above the upper end face (1031) of the second body portion (103) at the second side (1035) of the second body portion (103) so as to fix the wire electrode guide (10) to the fixing clamp (20).

8. The clamp (1) for spark-perforating on the trailing edge of castings according to claim 7, wherein the fixing portion (209) comprises:

a platen (2091) having a platen body and a platen protrusion, wherein the platen body has a first end and an upper end face, the platen protrusion protruding from the platen body at the first end of the platen body, the platen protrusion having a thickness less than a thickness of the platen body; and

elastic rotation portion (2093) is disposed in the upper end face of the pressing plate body, wherein the pressing plate (2091) can be driven to move up and down on the upper end face (2015) of the clamping body (201) by rotating the elastic rotation portion (2093), and when the wire electrode guide (10) is fixed to the fixing clamping piece (20) by the fixing portion (209), the pressing plate protruding portion presses the upper end face (1031) of the second body portion (103) from above the upper end face (2015) of the clamping body (201).

9. The jig (1) for spark-perforating on the trailing edge of castings according to claim 4, wherein,

the clamping body (201) further has a third side (2019) and a fourth side (2021), the third side (2019) and the fourth side (2021) being between the first side (2011) of the clamping body (201) and the second side (2013) of the clamping body (201), and the third side (2019) and the fourth side (2021) being opposite,

wherein the fixed clamp (20) further comprises:

a first positioning element (211) arranged on the third side (2019); and

a second positioning element (213) arranged on the fourth side (2021),

wherein the first positioning piece (211) and the second positioning piece (213) are used for positioning adjacent clamps (1) used for carrying out electric spark perforation on the tail edge of the casting when a plurality of clamps (1) used for carrying out electric spark perforation on the tail edge of the casting are arranged on the tail edge (30, 301, 302) of the casting.

10. The jig (1) for spark-perforating on the trailing edge of castings according to claim 2, characterized in that the plurality of through holes (H) have a chamfer in the second body portion (103) inclined from the upper end face (1031) of the second body portion (103) into the second body portion (103) such that the radius of the plurality of through holes in the upper end face (1031) of the second body portion (103) is larger than the radius of the plurality of through holes inside the first body portion (101) and the second body portion (103).