Fixture and method for rapidly machining six-equally-divided notches in expansion pin type part

Abstract

The invention provides a clamp and method for rapidly machining six-equal-division notches in an expansion pin type part, and belongs to the field of aircraft part machining. A V-shaped block is fixed to a bottom plate of the machining clamp, two V-shaped grooves are formed in the V-shaped block side by side and used for containing the two expansion pin type parts, a positioning block is further fixed to the bottom plate to position the end faces of the two expansion pin type parts, and the two expansion pin type parts are clamped by matching a pressing plate with a pressing stud and a pressing nut. Limiting pins are arranged on the two sides of the two expansion pin type parts and used for positioning the position of a notch to be machined. Precise positioning and rapid machining of the expansion pin type parts can be achieved, the problem that precision is affected by accumulative errors caused by turnover of multiple procedures is avoided, the problems that clamping is difficult, consumed time is long and the accuracy rate is low are solved, the production period is shortened, two expansion pin type parts are machined at a time, and the machining efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of aircraft parts processing, and relates to a fixture and a method for quickly processing six equally divided notches on a "rising pin" type part. Background Art

[0002] There is a kind of "hot selling" part in the aircraft (such as Figure 1 ), which is part of the aircraft system. According to the process requirements, the outer circle dimensions are first turned, and then the six-divided slots are processed. For the processing of the six-divided slots, according to the conventional processing method in the past, the circular holes on the six-divided slots are first fine-bored, and then transferred to the EDM machine tool for the EDM operator to clamp and align the EDM machined slots according to the fine boring. There are several disadvantages to this conventional method: 1. Multiple process turnovers will cause cumulative errors and affect accuracy; 2. It is difficult for EDM operators to clamp by themselves, which takes a long time and has low accuracy; 3. Multiple process turnovers affect the production cycle. In addition, the demand for such parts is large, and the previous processing methods seriously affect efficiency and accuracy. Summary of the invention

[0003] In order to solve the above problems, according to the structural characteristics and use requirements of the "rising pin" type parts, combined with the characteristics of the electric spark machine tool itself, the present invention provides a fixture and method for quickly processing the six-equal-divided grooves on the "rising pin" type parts, and the fixture has the following functions: 1. It can be fixed on the electric spark machine tool to solve the problems of difficulty in self-clamping by electric spark operators, long time consumption, and low accuracy, and can realize rapid positioning and clamping of parts; 2. It is no longer necessary to fine-boring holes for electric spark six-equal-divided positioning, which solves the problem of multiple process turnover affecting the production cycle, and also solves the problem of cumulative errors caused by multiple process turnover affecting the accuracy; 3. Two parts can be processed at one time, and the processing efficiency is greatly improved.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A fixture for quickly processing six equally divided notches on a "rising pin" type part, the fixture comprising a base plate 1, a V-shaped block 2, a positioning block 3, a limit pin 4, a clamping mechanism, an electric spark mechanism, a support block 10, and a support block 2 11.

[0006] The base plate 1 is used to fix the entire fixture on the electric spark platform, and a V-shaped block 2 is fixedly connected to the middle thereof. The V-shaped block 2 is provided with two V-shaped grooves side by side, which is used to place two "rising pin" type parts side by side to achieve axial positioning of the two "rising pin" type parts. A threaded hole is formed between the two V-shaped grooves on the V-shaped block 2.

[0007] The positioning block 3 is a plate-like structure, which is vertically fixed on one side of the base plate 1, and the positioning block 3 is close to the notch on one side of the two V-grooves of the V-shaped block 2. The positioning block 3 is used to position the end faces of the two "rising pin" type parts.

[0008] The clamping mechanism includes a pressing plate 5, a clamping nut 12 and a clamping stud 13. A through hole is made in the middle of the pressing plate 5. The lower end of the clamping stud 13 is fixed in the threaded hole on the V-shaped block 2. The upper end passes through the through hole in the middle of the pressing plate 5 and is threadedly matched with the clamping nut 12. The height of the pressing plate 5 is adjusted by screwing the clamping nut 12 to clamp the two "rising pin" type parts on the V-shaped block 2.

[0009] The EDM mechanism includes a support plate 6, an electrode sheet 7, a connecting plate 8, a tail handle 9 and a fixing screw 14; a tail handle 9 is fixed to the upper middle part of the support plate 6 by a fixing screw 14, which is used to be fixed to the upper part of the EDM machine; through holes are formed at both ends of the support plate 6, and the upper ends of the two electrode sheets 7 respectively pass through the two through holes, and the upper ends of both are connected to a connecting plate 8, and the electrode sheet 7 and the connecting plate 8 are fixed on the support plate 6, and are used for EDM machining of notches on two "rising pin" type parts. The contact position between the electrode sheet 7 and the "rising pin" type part, that is, the notch machining position, is located at the highest point of the circumference of the "rising pin" type part, and the electrode sheet 7 is perpendicular to the upper surface of the base plate 1, that is, the horizontal plane, to ensure the machining accuracy of the notch.

[0010] The support block 10 and the support block 2 11 have the same structure. They are symmetrically installed at the two ends of the base plate 1 and are located between the positioning block 3 and the V-shaped block 2. Limit pins 4 are installed on the upper ends of the support block 10 and the support block 2 11. The angle between the axis of the limit pin 4 and the vertical direction is 60°. When the two "rising pin" type parts are rotated 60° in opposite directions after processing a slot, the limit pins 4 on the support block 10 and the support block 2 11 are inserted into the processed slot to locate the next slot processing position.

[0011] The present invention also provides a method for quickly processing a six-divided notch on a "rising pin" type part, which is implemented based on the above-mentioned fixture, and the method comprises the following steps:

[0012] Step 1, place two "rising pin" type parts respectively in the two V-shaped grooves on the V-shaped block 2, with one end of the two "rising pin" type parts to be processed facing the positioning block 3, and make their end faces close to the positioning block 3, so as to achieve the end face positioning of the two "rising pin" type parts.

[0013] Step 2, adjust the clamping nut 12 so that the pressure plate 5 presses the two "rising pin" type parts.

[0014] Step 3, connect the support plate 6 and the electrode sheet 7 thereon to the upper part of the EDM machine through the tail handle 9, and wire-cut EDM the notches on the two "rising pin" type parts.

[0015] Step 4. After the processing is completed, adjust the clamping nut 12, loosen the clamping of the two "rising pin" type parts, rotate the two "rising pin" type parts 60° in the opposite direction, and ensure that the limit pin 4 can be inserted into the processed groove on the "rising pin" type parts; confirm that the end faces of the two "rising pin" type parts fit the positioning block 3, tighten the clamping nut 12 again to achieve clamping, and then perform electrospark machining again to complete the second groove machining.

[0016] Step 5: Repeat step 4 until all the notches are processed.

[0017] The beneficial effects of the present invention are: the present invention can realize the precise positioning and rapid processing of "rising sales" type parts, avoid the problem of cumulative error caused by multiple process turnovers in the processing of "rising sales" type parts, and affect the accuracy, avoid the problem of difficulty in self-clamping by EDM operators, long consumption time, and low accuracy, and avoid the problem of multiple process turnovers affecting the production cycle. And processing two "rising sales" type parts at a time greatly improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the “rising sales” type parts.

[0019] Figure 2 Schematic diagram of the fixture structure of the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a top view.

[0020] Figure 3 It is a schematic diagram of the clamp of the present invention clamping the "rising pin" type part.

[0021] In the figure: 1-base plate; 2-V-shaped block; 3-positioning block; 4-limiting pin; 5-pressing plate; 6-supporting plate; 7-electrode sheet; 8-connecting plate; 9-tail handle; 10-supporting block one; 11-supporting block two; 12-clamping nut; 13-clamping stud; 14-fixing screw. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments improved or adjusted by ordinary technicians in this field based on the embodiments of the present invention belong to the protection scope of the present invention.

[0023] A fixture for quickly processing six equally divided notches on "rising pin" type parts, the fixture comprises a base plate 1, a V-shaped block 2, a positioning block 3, a limit pin 4, a pressure plate 5, a support plate 6, an electrode sheet 7, a connecting plate 8, a tail handle 9, a support block 10, a support block 2 11, a clamping nut 12, a clamping stud 13 and a fixing screw 14, such as Figure 2 shown.

[0024] The base plate 1 is used to fix the entire fixture on the electric spark platform, and a V-shaped block 2 is fixedly connected to the middle part through standard parts. The V-shaped block 2 is provided with two V-shaped grooves side by side, which is used to place two "rising pin" type parts side by side to achieve the axial positioning of the two "rising pin" type parts. A threaded hole is formed between the two V-shaped grooves on the V-shaped block 2.

[0025] The positioning block 3 is a plate-like structure, which is vertically fixed on one side of the base plate 1 through standard parts, and the positioning block 3 is close to the notch on one side of the two V-grooves of the V-shaped block 2. The positioning block 3 is used to position the end faces of the two "rising pin" type parts.

[0026] A through hole is made in the middle of the pressure plate 5, and the lower end of the clamping stud 13 is fixed in the threaded hole on the V-shaped block 2. The upper end passes through the through hole in the middle of the pressure plate 5 and is threadedly engaged with the clamping nut 12. The height of the pressure plate 5 is adjusted by screwing the clamping nut 12 to press the two "rising pin" type parts onto the V-shaped block 2.

[0027] A tail handle 9 is fixed to the upper middle part of the support plate 6 by a fixing screw 14, which is used to fix to the upper part of the EDM machine tool; through holes are made at both ends of the support plate 6, and the upper ends of the two electrode sheets 7 are respectively passed through the two through holes, and the upper ends of both are connected to a connecting plate 8. The electrode sheet 7 and the connecting plate 8 are fixed to the support plate 6 by standard parts, and are used for EDM of notches on two "rising pin" type parts. The contact position between the electrode sheet 7 and the "rising pin" type part, that is, the notch processing position, is located at the highest point of the circumference of the "rising pin" type part, and the electrode sheet 7 is perpendicular to the upper surface of the base plate 1, that is, the horizontal plane, to ensure the notch processing accuracy.

[0028] The support block 10 and the support block 2 11 have the same structure. The two are symmetrically installed at the two ends of the base plate 1 through standard parts, and are located between the positioning block 3 and the V-shaped block 2. Limit pins 4 are installed on the upper ends of the support block 10 and the support block 2 11. The angle between the axis of the limit pin 4 and the vertical direction is 60°. When the two "rising pin" type parts are rotated 60° in opposite directions after processing a slot, the limit pins 4 on the support block 10 and the support block 2 11 are inserted into the processed slot to locate the next slot processing position.

[0029] The present invention also provides a method for quickly processing a six-divided notch on a "rising pin" type part, which is implemented based on the above-mentioned fixture, and the method comprises the following steps:

[0030] Step 1, place two "rising pin" type parts respectively in the two V-shaped grooves on the V-shaped block 2, with one end of the two "rising pin" type parts to be processed facing the positioning block 3, and make their end faces close to the positioning block 3, so as to achieve the end face positioning of the two "rising pin" type parts.

[0031] Step 2, adjust the clamping nut 12 so that the pressure plate 5 presses the two "rising pin" type parts.

[0032] Step 3, connect the support plate 6 and the electrode sheet 7 thereon to the upper part of the EDM machine through the tail handle 9, and wire-cut EDM the notches on the two "rising pin" type parts, such as Figure 3 shown.

[0033] Step 4. After the processing is completed, adjust the clamping nut 12, loosen the clamping of the two "rising pin" type parts, rotate the two "rising pin" type parts 60° in the opposite direction, and ensure that the limit pin 4 can be inserted into the processed groove on the "rising pin" type parts; confirm that the end faces of the two "rising pin" type parts fit the positioning block 3, tighten the clamping nut 12 again to achieve clamping, and then perform electrospark machining again to complete the second groove machining.

[0034] Step 5: Repeat step 4 until all the notches are processed.

[0035] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A fixture for quickly processing six equally divided notches on "rising pin" type parts, characterized in that: The clamp comprises a base plate (1), a V-shaped block (2), a positioning block (3), a limit pin (4), a clamping mechanism, an electric spark mechanism, a support block 1 (10), and a support block 2 (11); The base plate (1) is used to fix the entire fixture on the electric spark platform, and a V-shaped block (2) is fixedly connected to the middle thereof, and is used to place two "rising pin" type parts side by side, and a threaded hole is formed at the center position of the V-shaped block (2); The positioning block (3) is fixed on one side of the bottom plate (1) and is used to position the end faces of the two "rising pin" type parts; The clamping mechanism is fixed in the threaded hole at the center of the V-shaped block (2) and clamps the two "rising pin" type parts by means of threaded fit; The EDM mechanism is fixed to the upper part of the EDM machine tool to perform notch processing on the highest point of the circumference of the "rising pin" type part; The support block 1 (10) and the support block 2 (11) have the same structure. The two are symmetrically installed at the two ends of the base plate (1) and are located between the positioning block (3) and the V-shaped block (2). The upper ends of the support block 1 (10) and the support block 2 (11) are both installed with a limit pin (4). The angle between the axis of the limit pin (4) and the vertical direction is 60 degrees. The limit pin (4) is inserted into the processed notch to locate the next notch processing position.

2. A fixture for quickly processing six-divided notches on "rising pin" type parts according to claim 1, characterized in that: The V-shaped block (2) is provided with two V-shaped grooves side by side for stably placing two "rising pin" type parts.

3. A fixture for quickly processing six-divided notches on "rising pin" type parts according to claim 1, characterized in that: The clamping mechanism comprises a clamping plate (5), a clamping nut (12) and a clamping stud (13). A through hole is formed in the middle of the clamping plate (5). The lower end of the clamping stud (13) is fixed in the threaded hole on the V-shaped block (2). The upper end passes through the through hole in the middle of the clamping plate (5) and is threadedly engaged with the clamping nut (12). The height of the clamping plate (5) is adjusted by turning the clamping nut (12) to clamp the two "rising pin" type parts onto the V-shaped block (2).

4. A fixture for rapidly processing a notch in six equal parts on a "rising pin" type part according to claim 1, characterized in that: The electric spark mechanism comprises a support plate (6), an electrode sheet (7), and a tail handle (9); a tail handle (9) is fixed on the top of the support plate (6) for fixing to the upper part of the electric spark machine; electrode sheets (7) are fixed on both ends of the support plate (6) for electric spark machining of notches on two "rising pin" type parts, and the notch machining position is located at the highest point of the circumference of the "rising pin" type parts.

5. A fixture for rapidly processing a notch in six equal parts on a "rising pin" type part according to claim 4, characterized in that: The support plate (6) and the tail handle (9) are fixedly connected via fixing screws (14).

6. A fixture for rapidly processing a notch in six equal parts on a "rising pin" type part according to claim 1, characterized in that: The upper end of the electrode sheet (7) is fixed on the support plate (6) via a connecting plate (8).

7. A fixture for rapidly processing a notch in six equal parts on a "rising pin" type part according to claim 1, characterized in that: The electrode sheet (7) is perpendicular to the upper surface of the bottom plate (1), thereby ensuring the machining accuracy of the notch.

8. A method for quickly processing a six-divided notch on a "rising pin" type part, based on the fixture described in any one of claims 1 to 7, characterized in that: The method comprises the following steps: Step 1, placing two "rising pin" type parts on the V-shaped block (2) respectively, with one end of the two "rising pin" type parts to be processed facing the positioning block (3), and making the end faces of the two "rising pin" type parts close to the positioning block (3), so as to achieve the end face positioning of the two "rising pin" type parts; Step 2, adjust the clamping mechanism to clamp the two "rising pin" type parts; Step 3, connect the EDM mechanism to the upper part of the EDM machine, and wire-cut EDM the notches on the two "rising pin" parts; Step 4: After the processing is completed, adjust the clamping mechanism to release the clamping of the two "rising pin" type parts, rotate the two "rising pin" type parts 60 degrees in opposite directions, and insert the limit pin (4) into the processed notch on the "rising pin" type parts; confirm that the end faces of the two "rising pin" type parts fit the positioning block (3), adjust the clamping mechanism again to achieve clamping, and then perform the second notch processing; Step 5: Repeat step 4 until all the notches are processed.

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