Grooved saddle structure for forging inner stepped hole

Abstract

The utility model belongs to the technical field of chambering mandrels, and particularly relates to a grooved mandrel structure for forging an inner stepped hole, which comprises an adjusting lever, and a second perforating column is arranged at one end of the adjusting lever; the shaping part is arranged on the adjusting lever in a sleeving mode, a first perforated column is arranged on the side, facing the second perforated column, of the shaping part, and the first perforated column is of a hollow structure; wherein the inner diameter of the adjusting lever is smaller than that of the second perforated column, and the saddle has the advantages that the machining groove is formed in the saddle, a stepped hole can be formed in the forging process, additional cutting machining is not needed, and therefore waste of materials is reduced, and production efficiency is improved. And meanwhile, due to the arrangement of the machining groove, the forged piece has higher quality, and the requirement of industrial production is met. In addition, through cooperation of an adjusting lever and a shaping part, forging of stepped holes of different sizes can be achieved, and the universality and practicability of the device are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hole expanding mandrel, specifically relates to a structure of slot mandrel for inner step hole forging. BACKGROUND

[0002] Mandrel expanding is a kind of technical means commonly used in metal forging processing, which makes workpiece plastic deformation by mandrel exerting external force, so as to achieve the purpose of expanding hole, when hole processing, workpiece is usually forged into a cylinder shape first, then mandrel is inserted into the hole of the forging, and the forging is knocked, to complete hole processing.

[0003] In the prior art, when processing in hole, if step shape needs to be made, cutting processing method is generally used.However, this processing method often needs to consume a large amount of material, which is easy to cause material waste.In addition, the processing cycle is relatively long, which not only prolongs the production time of single part, but also affects the efficiency of the whole processing flow, thereby slowing down the overall processing speed. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a structure of slot mandrel for inner step hole forging, which aims to forge inner step forging by step mandrel, realize reducing cutting amount, improve production efficiency and obtain high-quality forging product.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A structure of slot mandrel for inner step hole forging, comprising an adjusting lever, one end of the adjusting lever is provided with a second perforated column;

[0007] A shaping part is sleeved on the adjusting lever, one side of the shaping part towards the second perforated column is provided with a first perforated column, and the first perforated column is a hollow structure;

[0008] Wherein, the inner diameter of the adjusting lever is smaller than the inner diameter of the second perforated column, the outer diameter of the first perforated column is equal to the outer diameter of the second perforated column, and a reserved gap is arranged between the first perforated column and the second perforated column, and the reserved gap forms a processing groove.

[0009] As a preferred technical scheme, the shaping part comprises a sleeve, the sleeve is sleeved on the adjusting lever, and one end of the sleeve is provided with a contact disc connected with the first perforated column, and the contact disc is suitable for contacting the workpiece.

[0010] Further, the bottom of the adjusting lever is provided with a limiting convex strip, and the limiting convex strip extends along the length direction of the adjusting lever, wherein a plurality of perforations are arranged on the limiting convex strip.

[0011] Further, the bottom of the sleeve is provided with a clamping groove, which is matched with the limiting convex strip.

[0012] Further, the clamping groove comprises a supporting plate, which is arranged at the bottom of the clamping groove, and the top of the supporting plate abuts against the bottom of the limiting convex strip.

[0013] Further, a connecting piece is arranged between the clamping groove and the limiting convex strip, which comprises a screw rod, and the screw rod is arranged in the through hole.

[0014] Further, the abutting disc is arc-shaped, and the outer diameter of the abutting disc is larger than the inner diameter of the first through hole column.

[0015] Further, the second through hole column is in solid structure, and the end of the second through hole column away from the first through hole column is tapered.

[0016] In summary, due to the adoption of the above technical scheme, the beneficial effects of the present application are as follows:

[0017] By arranging the machining groove on the horse lever, a stepped hole can be formed during forging without additional cutting processing, thereby reducing material waste and improving production efficiency. At the same time, the arrangement of the machining groove also makes the forged workpiece have higher quality, meeting the needs of industrial production. In addition, by adjusting the cooperation of the lever and the shaping part, different sizes of stepped holes can be forged, improving the versatility and practicality of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be described by examples and with reference to the accompanying drawings, in which:

[0019] Figure 1 is a structural schematic view of a horse lever structure with a groove for inner stepped hole forging provided by the present application;

[0020] Figure 2 is a sectional view of a sleeve and an adjusting lever provided by the present application.

[0021] Adjusting lever-1; Shaping part-2; Sleeve-3; Limiting convex strip-4; Abutting disc-5; First through hole column-6; Second through hole column-7; Connecting piece-8; Clamping groove-9. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Embodiment one

[0024] In the prior art, when machining a hole, if a step shape needs to be made, a cutting machining method is generally used. However, this machining method often needs to consume a large amount of material, which is easy to cause material waste. In addition, the machining period is relatively long, which not only prolongs the production time of a single part, but also affects the efficiency of the whole machining process, thereby slowing down the overall machining speed.

[0025] Therefore, in order to solve the above problems and realize the functions of reducing the cutting amount and improving the production efficiency, the utility model discloses a grooved mandrel structure for inner step hole forging, referring to Figure 1 and Figure 2 , including the adjusting lever 1, one end of the adjusting lever 1 is equipped with the second perforated column 7, the plastic part 2 is sleeved on the adjusting lever 1, and the side of the plastic part 2 towards the second perforated column 7 is equipped with the first perforated column 6, and the first perforated column 6 is a hollow structure, wherein the inner diameter of the adjusting lever 1 is smaller than the inner diameter of the second perforated column 7, the outer diameter of the first perforated column 6 is equal to the outer diameter of the second perforated column 7, and the first perforated column 6 and the second perforated column 7 are equipped with a reserved gap, and the reserved gap forms a machining groove.

[0026] In the embodiment, when machining a hole, the worker can first pass the second perforated column 7 through the cylindrical forging, then assemble the adjusting lever 1 and the plastic part 2 together, so that the reserved gap between the first perforated column 6 and the second perforated column 7 is aligned with the inner wall of the cylindrical forging. Then, by knocking or other ways of applying external force, the plastic part 2 extrudes the inner wall of the cylindrical forging, and since the first perforated column 6 is a hollow structure and its outer diameter is equal to the outer diameter of the second perforated column 7, a step shape corresponding to the shape of the reserved gap can be formed on the forging. In this process, the reserved gap plays a guiding role in shaping, so that the machined step shape is more accurate and regular. At the same time, since the forging method is used instead of cutting machining, the cutting amount can be greatly reduced, the production efficiency can be improved, and high-quality forging products can be obtained. In addition, the grooved mandrel structure of the utility model can also adapt to cylindrical forgings of different sizes by adjusting the position of the plastic part 2 on the adjusting lever 1.

[0027] It should be noted that when the grooved mandrel structure is working, the worker needs to prepare a support frame, which respectively abuts the ends of the adjusting lever 1 and the second perforated column 7 away from each other, and the support frame is provided with clamping grooves matched with the adjusting lever 1 and the second perforated column 7. The support frame is used to keep the adjusting lever 1 and the second perforated column 7 stable during the forging process, so as to avoid shaking or deviation, thereby further ensuring the accuracy and regularity of the machined step shape.

[0028] As an option, the second piercing column 7 is a solid structure, and the end of the second piercing column 7 away from the first piercing column 6 is tapered. The tapered structure facilitates the penetration of the second piercing column 7 into the cylindrical forging, and the tapered structure also serves as a guide, making it easier for the second piercing column 7 to align with the center of the forging, further improving the accuracy of the processing. In addition, the tapered structure can also enhance the strength of the second piercing column 7, so that it is not easy to deform or damage during forging.

[0029] Embodiment Two

[0030] On the basis of Embodiment One, in order to make the shaping part 2 move smoothly on the adjusting rod 1 to adjust the width of the processing groove, the shaping part 2 comprises a sleeve 3, which is sleeved on the adjusting rod 1, and one end of the sleeve 3 is provided with a contact disc 5 connected with the first piercing column 6, which is adapted to contact the workpiece.

[0031] In this embodiment, the worker can adjust the position of the shaping part 2 on the adjusting rod 1 through the sleeve 3. Specifically, the worker can manually hold the sleeve 3 and move along the length direction of the adjusting rod 1 until the reserved gap between the first piercing column 6 and the second piercing column 7 is adjusted to the required width.

[0032] During processing, the contact disc 5 can be in contact with the outer wall of the forging, which helps to improve the stability of the forging. In addition, the arc design of the contact disc 5 can cooperate with the first piercing column 6 to form a transition surface, which helps to improve the tightness and stability of the contact with the forging.

[0033] Embodiment Three

[0034] On the basis of Embodiment Two, in order to further improve the stability of the shaping part 2 on the adjusting rod 1, the bottom of the adjusting rod 1 is provided with a limiting protrusion 4 extending along the length direction of the adjusting rod 1, wherein a plurality of through holes are formed on the limiting protrusion 4, and the bottom of the sleeve 3 is provided with a clamping groove 9 adapted to the limiting protrusion 4.

[0035] In this embodiment, when it is necessary to adjust the position of the shaping part 2 on the adjusting rod 1, the worker can align the clamping groove 9 with the limiting protrusion 4 and move along the length direction of the limiting protrusion 4 until the clamping groove 9 is moved to the appropriate position. Then, by using a connecting piece 8 such as a screw rod, the clamping groove 9 is fixedly connected with the limiting protrusion 4 by being inserted into the through holes on the limiting protrusion 4. In this way, the shaping part 2 can be kept stable on the adjusting rod 1, avoiding shaking or idling during processing, thereby ensuring the accuracy and regularity of the processed stepped shape. In addition, the limiting protrusion 4 and the clamping groove 9 also serve as a guide, making the movement of the shaping part 2 on the adjusting rod 1 more smooth and accurate.

[0036] Further, after the step machining is completed, the worker can remove the screw rod, take off the shaping part 2 from the adjusting lever 1, and in this way, the processed forged piece is taken out.

[0037] In addition, the clamping groove 9 comprises a supporting plate arranged at the bottom of the clamping groove 9, and the top of the supporting plate abuts against the bottom of the limiting convex strip 4. The supporting plate can support the limiting convex strip 4, further enhancing the stability of the shaping part 2 on the adjusting lever 1. At the same time, the design of the supporting plate can also make the connection between the clamping groove 9 and the limiting convex strip 4 more compact, avoiding the loosening or falling off during the machining process, thereby ensuring the stability and reliability of the entire slotted lever structure.

[0038] In summary, in combination with examples one to three, the working steps of the slotted lever structure for inner step hole forging are as follows:

[0039] Firstly, check the integrity of each part of the slotted lever structure. Confirm that the limiting convex strip 4 of the adjusting lever 1 is not deformed, the sleeve 3 of the shaping part 2 is firmly connected with the abutting disc 5, the outer diameter of the first perforated column 6 and the second perforated column 7 is consistent, and the reserved gap is not blocked by foreign matter. At the same time, prepare the appropriate support frame and check whether the clamping groove matches the end of the adjusting lever 1 and the second perforated column 7.

[0040] Secondly, according to the inner diameter size of the cylindrical forged piece, adjust the position of the shaping part 2 on the adjusting lever 1. Align the clamping groove 9 of the sleeve 3 with the limiting convex strip 4 of the adjusting lever 1, slide the sleeve 3 along the limiting convex strip 4, and adjust the reserved gap between the first perforated column 6 and the second perforated column 7 to the required width. After adjustment, use a screw rod or other connecting piece to pass through the perforation of the limiting convex strip 4 to fix the clamping groove 9 and the limiting convex strip 4, ensuring that the shaping part 2 is stable on the adjusting lever 1 and does not slide.

[0041] Then, align the tapered end of the second perforated column 7 with the center hole of the cylindrical forged piece, and slowly insert it until the second perforated column 7 completely passes through the forged piece. Place the support frame at the end of the adjusting lever 1 and the second perforated column 7, fix them through the clamping groove, so that the adjusting lever 1 and the second perforated column 7 remain coaxial and horizontally stable, avoiding deviation during forging.

[0042] Subsequently, apply external force to the shaping part 2 for forging processing. By knocking or using pressure equipment on the abutting disc 5, the shaping part 2 moves along the adjusting lever 1 towards the second perforated column 7, and the reserved gap between the first perforated column 6 and the second perforated column 7 is used to extrude and shape the inner wall of the forged piece. In this process, the curved surface of the abutting disc 5 closely abuts against the outer wall of the forged piece, ensuring the stability of the forged piece until the inner wall forms a step shape corresponding to the reserved gap.

[0043] In the processing, the deformation of the forging is observed in real time, if the step size deviation is found, the connecting piece is loosened to adjust the reserved gap width, the above steps are repeated until the design requirement is reached. After the processing is completed, the support frame is removed, the shaping part 2 is taken off from the adjusting lever 1, and the forged forging is taken out, the precision and surface quality of the step hole are checked to ensure that there is no crack or deformation.

[0044] Finally, the structure of the slotted lever is cleaned and maintained. The scale and oil stains on the surface of the adjusting lever 1 and the perforated column are removed, the wear of the limiting convex strip 4 and the clamping groove 9 is checked, if there is looseness or damage, the connecting piece is replaced in time. The parts are stored in categories to avoid bumping and prepare for the next processing.

[0045] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A slotted mandrel structure for use in the closed-die forging of an internally stepped hole, characterized by, The utility model relates to a kind of adjustable rod and shaped part, including: Adjustable rod (1), one end of the adjustable rod (1) is equipped with second perforated column (7); Shaped part (2), the shaped part (2) is sleeved on the adjustable rod (1), and the side of the shaped part (2) towards the second perforated column (7) is equipped with first perforated column (6), and the first perforated column (6) is hollow structure; Wherein, the inner diameter of the adjustable rod (1) is less than the inner diameter of second perforated column (7), the outer diameter of the first perforated column (6) is equal to the outer diameter of second perforated column (7), and the first perforated column (6) and second perforated column (7) are equipped with reserved gap, and the reserved gap forms processing groove.

2. The grooved mandrel structure for internal step hole forging according to claim 1, wherein The shaped part (2) includes sleeve (3), the sleeve (3) is sleeved on the adjustable rod (1), and one end of sleeve (3) is equipped with abutting disc (5) connected with first perforated column (6), and the abutting disc (5) is suitable for abutting workpiece.

3. The grooved mandrel structure for internal step hole forging according to claim 2, wherein The bottom of the adjustable rod (1) is equipped with limiting convex strip (4), and the limiting convex strip (4) extends along the length direction of the adjustable rod (1), and wherein, a plurality of perforations are formed in the limiting convex strip (4).

4. The grooved mandrel structure for internal step hole forging according to claim 2, wherein The bottom of the sleeve (3) is equipped with clamping groove (9), and the clamping groove (9) is suitable for limiting convex strip (4).

5. The grooved mandrel structure for internal step hole forging according to claim 4, wherein The clamping groove (9) includes supporting plate, and the supporting plate is arranged at the bottom of the clamping groove (9), and the top of the supporting plate abuts against the bottom of the limiting convex strip (4).

6. The grooved mandrel structure for internal step hole forging according to claim 5, wherein The clamping groove (9) and the limiting convex strip (4) are equipped with connecting piece (8), and the connecting piece (8) includes screw rod, and the screw rod is arranged in the perforation.

7. The grooved mandrel structure for internal step hole forging according to claim 2, wherein The abutting disc (5) is arc surface, and the outer diameter of the abutting disc (5) is greater than the inner diameter of the first perforated column (6).

8. The grooved mandrel structure for internal step hole forging according to claim 1, wherein The second perforated column (7) is solid structure, and the end of the second perforated column (7) away from the first perforated column (6) is tapered.

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