Grooving tool

Abstract

The grooving tool comprises a positioning workpiece, the positioning workpiece comprises a mould body, a plurality of first positioning pieces and a plurality of second positioning pieces, the first positioning pieces are arranged in the circumferential direction of the upper end face of the mould body at intervals, and the second positioning pieces are arranged in the circumferential direction of the upper end face of the mould body. After a workpiece is arranged on the mould body, the workpiece is axially pressed and positioned through the first positioning piece; the multiple second positioning pieces are arranged in the circumferential direction of the side face of the mould body at intervals, so that a workpiece is positioned in the horizontal direction through the second positioning pieces after being placed on the mould body. The annular thin-wall part grooving machine has the advantages that the workpiece can be positioned, manual beating control positioning through a rubber hammer is not needed, the grooving machining quality of an annular thin-wall part is greatly improved in the mode of upward pressing, downward jacking and lateral positioning of the mould body, meanwhile, the contact face of the workpiece cannot be affected, and then the product rate of the workpiece is increased.

Description

Technical Field

[0001] The invention relates to the technical field of solid rocket engines, in particular to a grooving tool. Background Art

[0002] Since the shell of a rocket engine is generally a thin-walled annular part, the grooving of this type of part is difficult to process. Due to its extremely thin wall and narrow and shallow groove structure, the conventional processing method of direct clamping and grooving will cause the thin wall of the workpiece to tremble during the processing, resulting in uneven width and vibration of the groove, and even easy to break the groove cutter during the processing. Summary of the invention

[0003] The present invention aims at the technical problems existing in the prior art and provides a grooving tool, which ensures the groove size and surface roughness during grooving, avoids the scrapping of the annular forging and prolongs the service life of the grooving cutter.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a grooving tool, comprising a positioning workpiece, the positioning workpiece comprising a tire body, a first positioning piece, and a second positioning piece, a plurality of first positioning pieces are provided and arranged at intervals along the circumferential direction of the upper end surface of the tire body, so that after the workpiece is placed on the tire body, it is axially pressed and positioned by the first positioning piece; The second positioning members are provided in a plurality and are arranged at intervals along the circumferential direction of the side surface of the tire body, so that after the workpiece is placed on the tire body, it is positioned in the horizontal direction by the second positioning members.

[0005] As a further technical solution, an upper ejector is provided at the lower part of the tire body, and the upper end surface of the upper ejector is arranged opposite to the bottom end surface of the workpiece to cooperate with the first positioning member to achieve axial fixation of the workpiece.

[0006] As a further technical solution, a plurality of third positioning members are provided on the upper end surface of the upper top member at intervals along its circumferential direction, and the third positioning members are used to position and install workpieces of different heights by controlling the axial height of the third positioning members.

[0007] As a further technical solution, the first positioning member includes a 7-type pressing member and a first bolt, and the pressing member is locked and fixed to the upper end surface of the tire body by the first bolt.

[0008] The insertion end of the first bolt passes through the surface where the horizontal edge of the 7-shaped part is located to be screwed into the tire body to cooperate with the lower pressing piece to press the upper part of the workpiece.

[0009] As a further technical solution, the end surfaces of the first fixing member and the second fixing member that are in contact with the workpiece are both provided with flexible members.

[0010] As a further technical solution, at least one inner stop is provided on the upper portion of the tire body for semi-positioning the workpiece.

[0011] As a further technical solution, it also includes a lifting workpiece used in conjunction with the positioning workpiece, the lifting workpiece includes a support, an L-shaped hook, and a locking piece, the lower part of the support is evenly distributed with a plurality of waist-shaped grooves along its circumferential direction, and the center lines of the plurality of waist-shaped grooves in the length direction all point to the center point of the lower part of the support; The long side of the L-shaped hook passes through the upper part of the waist-shaped groove and is controlled by the locking piece to be fixed in the length direction of the waist-shaped groove, so that the horizontal side of the L-shaped hook is located at the lower end surface of the workpiece during the lifting process, so as to lift the workpiece upward from the positioning workpiece.

[0012] As a further technical solution, the support member includes a support plate, a support rod, and a lifting ear arranged at the top end of the support rod. The support plate is provided with a waist-shaped groove to install the L-shaped hook, and the bottom end of the support rod is vertically connected to the support plate.

[0013] As a further technical solution, the locking member is a double nut, and the portion of the L-shaped hook extending out of the waist groove is an external thread structure, so as to match with the double nut to lock the L-shaped hook to the support member.

[0014] The beneficial effects of the present invention are: 1. The first and second positioning parts of the positioning workpiece can realize the positioning of the workpiece. There is no need to use a rubber hammer to manually control the positioning. The positioning is faster and quantitatively controlled. Through the "upward pressure", "downward push" and "side positioning" of the tire body, the grooving quality of the annular thin-walled parts is greatly improved. At the same time, it will not affect the contact surface of the workpiece, thereby improving the product rate of the workpiece; in addition, the design of the inner stop on the tire body can position workpieces with different outer diameters, greatly improving the practicality of the tooling; 2. The specific structural design of the lifting tool enables the use of one lifting tool to lift various types of workpieces. The operation is simple, fast and convenient, and there is no need to repeatedly customize new tooling, which saves costs and improves work efficiency; 3. The matching use of the workpiece positioning and the workpiece lifting in the present invention can complete the lifting and positioning of the workpiece more quickly, and can ensure the quality of the workpiece slot and the overall stability of the workpiece. It has a simple structure, low cost, significant use effect, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of positioning workpieces of the present invention; Figure 2 It is a schematic diagram of the structure after the longitudinal section of the positioning workpiece; Figure 3 It is a partial enlarged schematic diagram of positioning the workpiece; Figure 4 It is a schematic diagram of the structure of lifting a workpiece according to the present invention; Figure 5 It is a schematic diagram of the connection between the L-shaped hook and the locking piece; Figure 6 It is a schematic diagram of the connection structure between the support rod and the screw 8; Figure 7 It is a schematic diagram of the structure when the workpiece is lifted in the positioning workpiece; Figure 8 This is a schematic diagram of the partially enlarged structure of the workpiece.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows: Tire body 1, upper member 11, third positioning member 12, inner stop 13, first surface 13a, second surface 13b, inner wall surface 14; A first positioning member 2, a pressing member 21, and a first bolt 22; A second positioning member 3; Workpiece 4, third surface 41, fourth surface 42, fifth surface 43; Support member 5, waist groove 51, support plate 52, support rod 53, lifting ear 54; L-shaped hook 6, locking piece 7, screw 8. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0018] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0019] In the description of the present application, the term "for example" is used to mean "used as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily to be construed as being more preferred or advantageous than other embodiments. In order to enable any technician in the field to implement and use the present invention, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the present invention obscure. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in the present application.

[0020] Example 1 In order to ensure the hardness, groove size and surface roughness of the annular thin-walled parts and avoid losses caused by scrapping of the annular thin-walled parts, this embodiment provides a grooving tool that is particularly suitable for annular thin-walled parts, such as rocket engine grooving.

[0021] The specific structure of this embodiment includes positioning the workpiece, see Figure 1-Figure 3 The positioning workpiece includes a tire body 1, a first positioning piece 2, and a second positioning piece 3. A plurality of first positioning pieces 2 are provided and are arranged at intervals along the circumferential direction of the upper end surface of the tire body 1, so that after the workpiece is placed on the tire body 1, it is axially pressed and positioned by the first positioning pieces 2; a plurality of second positioning pieces 3 are provided and are arranged at intervals along the circumferential direction of the side surface of the tire body 1, so that after the workpiece is placed on the tire body 1, it is horizontally positioned by the second positioning pieces 3.

[0022] It can be seen that the workpiece is arranged in the tire body 1. This embodiment realizes the axial and horizontal positioning of the workpiece through the first positioning member 2 and the second positioning member 3, thereby ensuring the hardness of the workpiece, the dimensional accuracy of the groove and the roughness of the groove surface during the grooving process, and improving the product rate.

[0023] Furthermore, an upper ejector 11 is provided at the lower part of the tire body 1, and the upper end surface of the upper ejector 11 is opposite to the bottom end surface of the workpiece, so as to cooperate with the first positioning member 2 to achieve axial fixation of the workpiece. That is, when the workpiece is placed in the positioning workpiece, the axial displacement of the workpiece is simultaneously controlled by the first positioning member 2 and the upper ejector 11, thereby playing an axial fixing role.

[0024] The tire body 1 and the upper push piece 11 are both annular structures. The upper push piece 11 is arranged in the tire body 1, and the two can be formed in one piece; therefore, the inner diameter of the tire body 1 is larger than the outer diameter of the upper push piece 11. In order to facilitate the installation of the positioning workpiece on the machine tool, the lower part of the upper push piece 11 extends out of the tire body 1.

[0025] Furthermore, in order to facilitate adaptation to workpieces of different heights and thereby improve the versatility of positioning workpieces, a plurality of third positioning members 12 are provided on the upper end surface of the upper top member 11 at intervals along its circumferential direction. By controlling the axial height of the third positioning members 12, workpieces of different heights can be positioned and installed. When the workpiece is firmly positioned, the bottom end surface of the workpiece abuts against the top end surface of the third positioning member 12.

[0026] In the specific implementation process, the first positioning member 2 includes a pressing member 21 and a first bolt 22, and the pressing member 21 is locked and fixed to the upper end surface of the tire body 1 by the first bolt 22. The pressing member 21 is a 7-shaped member, and the bottom end surface where the vertical side of the 7-shaped member is located abuts against the tire body 1, and the horizontal side faces the center of the tire body 1, so that the upper part of the workpiece is clamped in the gap between the horizontal side of the 7-shaped member and the upper end surface of the tire body 1; the insertion end of the first bolt 22 passes through the surface where the horizontal side of the 7-shaped member is located to be screwed into the tire body 1, so as to cooperate with the pressing member 21 to press the upper part of the workpiece.

[0027] For example, the pressing member 21 is a 7-type pressing plate. To facilitate adapting to different types of workpieces, the through hole on the horizontal side of the 7-type pressing plate where the first bolt 22 is installed is a strip hole, so that the first bolt 22 can be moved along the length direction of the strip hole to adapt to the upper part of different workpieces pressed into the pressing member 21 and the upper end surface of the tire body 1, that is, the width between the workpiece pressed into the pressing member 21 and the upper end surface of the tire body 1 can be adjusted according to the position of the first bolt 22 on the strip hole. Correspondingly, the upper end surface of the tire body 1 is provided with a hole corresponding to the strip hole (not shown in the figure); In order to adapt to the height of the upper shoulder of different workpieces, a fixing pad (not shown in the figure) is also included. The fixing pad is fixed to the upper end surface of the workpiece shoulder by the first bolt 22 to reduce the gap between the bottom end surface of the horizontal edge of the lower pressure plate and the upper end surface of the tire body 1, while preventing the upper end surface of the shoulder from being crushed.

[0028] In order to protect the workpiece, the end surfaces of the first positioning member 2 and the second positioning member 3 that are in contact with the workpiece are provided with flexible parts. For example, the flexible parts are rubber pads. The rubber rings can be pasted on the end surfaces of the first positioning member 2 and the second positioning member 3 that need to be in contact with the workpiece. This structure further improves the workpiece yield rate.

[0029] In order to adapt to workpieces with different outer diameters and improve the processing quality of the grooving, the upper part of the tire body 1 is provided with at least one inner stop 13 along its height direction, which is used to semi-position the workpiece. The inner stop 13 is an annular groove structure, so that the upper part of the workpiece is supported on the bottom end surface of the annular groove and has a gap with the side surface. For example, when there is one inner stop 13, the gap can be 0.02-0.06mm. This structural design allows one tooling piece to be used for processing multiple workpieces, improving its versatility.

[0030] In this embodiment, for example, the second positioning member 3 and the third positioning member 12 are respectively the second bolt and the third bolt, and the insertion end of the second bolt is provided with the flexible member to protect the surface of the workpiece, and the depth of the insertion end inserted into the tire body 1 is adjustable to adapt to different types of workpieces and reduce the vibration of the workpiece in the horizontal direction during the grooving process; and the insertion end of the third bolt is inserted into the upper member 11, so the upper end surface of the third bolt is provided with the flexible member; correspondingly, the tire body 1 and the upper member 11 are respectively provided with screw holes adapted to the second bolt and the third bolt, and the depth of the screw holes can be controlled to adapt to different types of workpieces. In this embodiment, the positioning of the workpiece can be quantitatively controlled by the threaded method, which is more convenient and quicker to position than the conventional manual knocking with a rubber hammer.

[0031] The inner stop 13 includes a first surface 13A and a second surface 13B connected to each other, so that the longitudinal section formed by the first surface 13A, the second surface 13B and the inner wall surface 14 of the tire body 1 is a Z-shaped; in order to facilitate the installation of the workpiece into the tire body 1, a chamfer α is provided between the second surface 13B and the inner wall surface 14; correspondingly, the upper part of the workpiece and the structure placed on the tire body 1 are matched with the Z-shaped structure, for example, the surfaces on the workpiece 4 corresponding to the first surface 13A, the second surface 13B, and the inner wall surface 14 are the third surface 41, the fourth surface 42, and the fifth surface 43. (See Figure 3 , Figure 7 , Figure 8 ) In the specific implementation process, in order to achieve rapid lifting and avoid damage to the workpiece 4, see Figure 4 , Figure 7, and also includes a lifting workpiece used in conjunction with the positioning workpiece, that is, after the workpiece 4 is positioned and grooved by the positioning workpiece, the workpiece is lifted out of the positioning workpiece by the lifting workpiece for subsequent operations. The lifting workpiece includes a support member 5, an L-shaped hook 6, and a locking member 7. The lower part of the support member 5 is evenly distributed with a plurality of waist-shaped grooves 51 along its circumferential direction, and the center lines of the plurality of waist-shaped grooves 51 in the length direction all point to the center point of the lower part of the support member 5; the long side of the L-shaped hook 6 passes through the upper part of the waist-shaped groove 51, and is controlled by the locking member 7 to be fixed in the length direction of the waist-shaped groove 51, so that the horizontal side of the L-shaped hook 6 is located at the lower end surface of the workpiece 4, so as to lift the workpiece 4 upward from the positioning workpiece. During the lifting process, there is no need to use a rubber hammer to manually control the positioning. It is only necessary to remove the first positioning member 2, loosen the second bolt and the third bolt at the same time, so that the portion of the third bolt exposed on the upper part of the upper member 11 is lengthened to a suitable position, so as to facilitate the insertion of the horizontal edge of the L-shaped hook 6 between the bottom end face of the workpiece 4 and the upper end face of the upper member 11, and then use the lifting equipment to lift the lifting tool to achieve rapid lifting of the workpiece 4.

[0032] For example, during the lifting process, the design of the waist groove 51 facilitates the movement of the L-shaped hook 6, and can also lift products with different outer circle sizes, greatly improving applicability; It should be noted that the gap between the bottom end surface of the workpiece and the upper end surface of the upper member 11 is at least large enough to accommodate the horizontal side of the L-shaped hook 6 for lifting the workpiece 4. To prevent the workpiece 4 from being damaged, a rubber pad (not shown in the figure) is attached to the L-shaped hook 6. Furthermore, the support member 5 includes a support plate 52, a support rod 53, and a lifting ear 54 provided at the top of the support rod 53. The support plate 52 is provided with the waist groove 51 for installing the L-shaped hook 6. The bottom end of the support rod 53 is vertically connected to the support plate 52. In actual application, the support rod 53 is detachably connected to the support plate 52. For example, see Figure 6 A through hole is provided at the center of the support plate 52, and the support rod 53 is fixed to the support plate 52 by passing a screw 8 through the through hole from the bottom end of the support plate 52 to prevent the support plate 52 and the support rod 53 from falling off due to force during the lifting of the workpiece; therefore, an internal thread (not shown in the figure) is provided on the inner side of the lower part of the support rod 53 to be adapted for connection with the screw 8; when the tooling needs to be disassembled and transported, the screw 8 can be unscrewed from the support rod 53 in the reverse direction to disassemble the support plate 52 and the support rod 53.

[0033] For example, the screw 8 passes through the gasket and then passes through the through hole from the bottom end of the support plate 52 to improve the firmness of the support plate 52 and the support rod 53.

[0034] The support plate 52 is circular and can be adapted to the shape of the workpiece so as to stably lift the workpiece 4 .

[0035] It can be explained that the locking member 7 is a nut (see Figure 4 , Figure 5 , Figure 7 ), the portion of the L-shaped hook 6 extending out of the waist groove 51 is an external thread structure, so as to match with the nut to lock the L-shaped hook 6 to the support member 5. For example, the nut is a double nut, and after loosening the nut and the L-shaped hook 6, the position or orientation of the L-shaped hook 6 on the support plate 52 can be moved or rotated, and the double nut locks the L-shaped hook 6 on the support plate 52 to prevent the L-shaped hook 6 from loosening during the lifting process.

[0036] The present invention is achieved in this way, see Figure 7 : 1. Positioning the workpiece 4: placing the workpiece in the tire body 1, at this time, the first surface 13A, the second surface 13B, and the inner wall surface 14 on the tire body 1 correspond to the third surface 41, the fourth surface 42, and the fifth surface 43 on the workpiece, respectively, and the fourth surface 42 abuts against the second surface 13B, and there are gaps between the first surface 13A and the third surface 41, and between the inner wall surface 14 and the fifth surface 43; and the upper shoulder portion of the workpiece is located on the upper end surface of the tire body 1, and then the first positioning member 2 is installed on the tire body 1, and the upper shoulder portion of the workpiece 4 is preliminarily pressed, and at this time, the bottom end surface of the workpiece 4 is opposite to the second bolt; After adjusting the position of the workpiece in the tire body 1, tighten the first bolt 22 to achieve "upward pressure" on the workpiece, and then adjust the second bolt to tighten and position the workpiece in the circumferential direction to "side fix" the workpiece, and then achieve quantitative adjustment, and finally achieve the fixation of the workpiece in the horizontal direction; then use a tool to adjust the height of the third bolt in the tire body 1 so that the upper end face of the third bolt abuts against the lower end face of the workpiece, so as to cooperate with the first bolt 22 to achieve axial fixation of the workpiece, achieve "downward push" of the workpiece, and finally avoid the shaking of the workpiece during processing; After that, the grooving process can be carried out. Due to the structural design of the tire body 1, the hardness, groove size and surface roughness of the workpiece can be guaranteed during grooving, thereby improving the grooving product rate; 2. Lifting the workpiece 4: After the workpiece 4 is processed, the horizontal side of the L-shaped hook 6 is inserted into the bottom end of the workpiece, and then the first positioning member 2 is removed, and the second bolt is loosened, and the lifting ear 54 is lifted by the equipment. During this process, the workpiece is always located on the support plate 52, that is, the workpiece is lifted and separated from the tire body 1.

[0037] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0038] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A grooving tool, characterized in that: include: A positioning workpiece, the positioning workpiece comprising a tire body (1), a first positioning piece (2), and a second positioning piece (3), wherein a plurality of first positioning pieces (2) are provided and are arranged at intervals along the circumferential direction of the upper end surface of the tire body (1), so that after the workpiece is placed on the tire body (1), it is axially pressed and positioned by the first positioning pieces (2); A plurality of the second positioning members (3) are provided and are arranged at intervals along the circumferential direction of the side surface of the tire body (1), so that after the workpiece is placed on the tire body (1), it is positioned in the horizontal direction by the second positioning members (3).

2. A grooving tool according to claim 1, characterized in that: An upper top piece (11) is provided at the lower part of the tire body (1), and the upper end surface of the upper top piece (11) is opposite to the bottom end surface of the workpiece, so as to cooperate with the first positioning piece (2) to achieve axial fixation of the workpiece.

3. A grooving tool according to claim 2, characterized in that: A plurality of third positioning members (12) are provided at intervals along the circumferential direction on the upper end surface of the upper top member (11), and workpieces of different heights are positioned and installed by controlling the axial height of the third positioning members (12).

4. A grooving tool according to any one of claims 1 to 3, characterized in that: The first positioning member (2) comprises a pressing member (21) and a first bolt (22), and the pressing member (21) is locked and fixed to the upper end surface of the tire body (1) by means of the first bolt (22).

5. A grooving tool according to any one of claims 1 to 3, characterized in that: The end surfaces of the first positioning member (2) and the second positioning member (3) that are in contact with the workpiece are both provided with flexible members.

6. A grooving tool according to any one of claims 1 to 3, characterized in that: The upper part of the tire body (1) is provided with at least one inner stop (13) for semi-positioning a workpiece.

7. A grooving tool according to claim 1, characterized in that: Also included is a lifting workpiece used in conjunction with the positioning workpiece, the lifting workpiece comprising a support member (5), an L-shaped hook (6), and a locking member (7), the lower portion of the support member (5) being evenly distributed with a plurality of waist-shaped grooves (51) along its circumferential direction, and the center lines of the plurality of waist-shaped grooves (51) in the length direction all point to the center point of the lower portion of the support member (5); The long side of the L-shaped hook (6) passes through the upper part of the waist-shaped groove (51) and is controlled by the locking member (7) to be fixed in the length direction of the waist-shaped groove (51), so that the horizontal side of the L-shaped hook (6) is located at the lower end surface of the workpiece during the lifting process, so as to lift the workpiece upward from the positioning workpiece.

8. A grooving tool according to claim 7, characterized in that: The support member (5) comprises a support plate (52), a support rod (53), and a lifting ear (54) arranged at the top end of the support rod (53); the support plate (52) is provided with a waist-shaped groove (51) for mounting the L-shaped lifting hook (6); and the bottom end of the support rod (53) is vertically connected to the support plate (52).

9. A grooving tool according to claim 7, characterized in that: The locking member (7) is a nut, and the portion of the L-shaped hook (6) extending out of the waist groove (51) is an external thread structure, so as to match the nut and lock the L-shaped hook (6) to the support member (5).

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