Special-shaped horse rod and reaming device

Abstract

The special-shaped horse rod comprises an arc-shaped part arranged opposite to a forge piece and a positioning part connected to the other end of the arc-shaped part, on the section of a plumb bob, the positioning part is of a conical structure, the pointed cone end of the positioning part is far away from the arc-shaped part, and an inner ring groove is formed in the arc-shaped part of the special-shaped horse rod. A traditional cylindrical structure horse rod is changed, a section structure combining the arc shape and the inverted triangle shape is adopted, rotation of the horse rod can be limited, the horse rod does not rotate along with the forge piece, in other words, the expansion speed of the forge piece is low, and when the forge piece is of the same size, compared with a traditional reaming mode, the formed groove is deeper so as to be suitable for the small forge piece with the special-shaped inner diameter.

Description

Technical Field

[0001] The invention belongs to the technical field of annular forging processing, and particularly relates to a special-shaped forging rod and a hole expanding device having the forging rod. Background Art

[0002] The bar is a supporting component of the ring forging. It has an overall cylindrical structure, penetrates the forging and cooperates with the pressure roller to expand the hole of the forging. In the ring forging, when the pressure roller rotates, the bar rotates cooperatively and expands the hole of the forging, making the wall thinner. However, for small special-shaped ring forgings, especially those with special-shaped inner diameters, since the overall forging is relatively small, there are often problems in the design / production process such as the inability to punch large holes in the blank, the inability to open deep grooves in the inner diameter, and poor filling effects of the forgings. Summary of the invention

[0003] The present invention aims at the problems in the prior art of forgings with small inner diameter and special shape, that the blank cannot punch large holes, the inner diameter cannot open deep grooves, and the filling effect of the forgings is poor. The present invention provides a special-shaped horse bar and a hole expanding device. The specific technical scheme is as follows: The present application provides a special-shaped horse stick, including an arc-shaped portion arranged relative to a forging and a positioning portion connected to the other end of the arc-shaped portion. On a plumb cross section, the positioning portion is a conical structure, and the pointed cone end is away from the arc-shaped portion. An inner annular groove is provided on the arc-shaped portion of the special-shaped horse stick.

[0004] As a further technical solution of the present invention, the inner annular groove extends along the trajectory of the arc portion and forms an opening at the side end of the special-shaped horse stick.

[0005] As a further technical solution of the present invention, on the plumb cross section, the area of ​​the positioning portion is larger than the area of ​​the arc portion.

[0006] As a further technical solution of the present invention, the pointed cone end of the positioning portion has a width so that the entire portion forms a trapezoidal structure.

[0007] The hole expanding device comprises the above-mentioned special-shaped horse stick, a horse frame carrying the special-shaped horse stick, a forging body sleeved on the special-shaped horse stick, and a pressing roller cooperating with the special-shaped horse stick to press the forging body.

[0008] As a further technical solution of the present invention, a support gasket ring is sleeved on the inner ring groove, the inner diameter of the support gasket ring is concentrically arranged with the arc-shaped portion, the support gasket ring has a starting end, a terminating end and a notch separating the starting end and the terminating end, and the outer diameter of the support gasket ring gradually decreases along the path from the starting end to the terminating end; The support pad changes between an initial state and a final state when rotating around its center; In the initial state, the starting end of the support ring is inserted into the inner ring groove and corresponds to the forging body, and the outer diameter of the starting end is matched with the outer diameter of the inner ring groove; In the final state, the notch of the support ring overlaps with the inner ring groove and corresponds to the forging body.

[0009] As a further technical solution of the present invention, the outer diameter of the support ring is gradually reduced and smoothly transitioned.

[0010] As a further technical solution of the present invention, the outer diameter of the support ring is gradually reduced and has a step transition.

[0011] As a further technical solution of the present invention, the horse frame is also provided with a driving part for driving the support pad to rotate around its center, and the driving part includes an active part and a driven part arranged on both sides of the support pad ring; The active part includes an active roller that abuts against the inner wall of the support ring; The driven portion includes a driven roller that abuts against an outer wall of the support washer.

[0012] As a further technical solution of the present invention, the active part further comprises an output motor mounted on the horse frame, an output end of the output motor is connected to an output shaft, and the active roller is connected to the other end of the output shaft; The driven part also includes a fixing rod installed on the horse frame and a sleeve box connected to the other end of the fixing rod, a panel is inserted into the open end of the sleeve box, and the driven roller is rotatably installed on the end of the panel away from the opening.

[0013] As a further technical solution of the present invention, a spring is installed in the sleeve box, and the spring is in a compressed state and drives the driven roller to always contact the outer wall of the support gasket ring during the rotation of the support gasket ring.

[0014] As a further technical solution of the present invention, the active roller has barbs on its outside, and when the active roller rotates, the barbs abut against the supporting ring and drive it to rotate.

[0015] As a further technical solution of the present invention, at least two groups of driving parts are provided, which are arranged at intervals along the rotation path of the supporting gasket ring, and the path distance between two adjacent groups of driving parts is greater than the gap.

[0016] As a further technical solution of the present invention, the horse stand includes a horizontally arranged base plate and two supporting side plates vertically installed on the base plate, the two supporting side plates are arranged at intervals, and each of the supporting side plates is provided with a positioning groove corresponding to the positioning part, and in the installed state, the positioning part is inserted into the positioning groove.

[0017] The beneficial effects of the present invention are as follows: (1) Special-shaped horse rods change the traditional cylindrical structure of horse rods and adopt a cross-sectional structure that combines an arc with an inverted triangle. This can limit the rotation of the horse rod and prevent it from rotating with the forging. In other words, the expansion speed of the forging is slow. When the forgings are of the same size, the groove opened is deeper than the traditional hole expansion method, so it is suitable for small forgings with special inner diameters.

[0018] (2) A hole expansion device is provided with a support washer. In the initial state, the starting end of the support washer can be inserted into the inner ring groove and prop up the side wall of the inner ring groove to prevent the inner ring groove from shrinking. As the forging is pressed in, the support washer rotates around its center and the outer diameter of the part entering the inner ring groove is continuously reduced to match the forging body with an increasing inner diameter. The support washer cooperates with the forging body to ensure that the inner ring groove is always filled and supported.

[0019] (3) The hole expansion device is also provided with a driving part, which can drive the support pad to rotate around its center and adjust the rotation speed of the support pad ring to adapt to the expansion speed of the inner diameter of the forging body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The structural schematic diagram of the special-shaped horse stick is shown; Figure 2 A schematic diagram of the structure of a side section of a special-shaped horse stick is shown; Figure 3 A schematic diagram of the deformed structure of a special-shaped horse stick is shown; Figure 4 A schematic structural diagram of a hole expansion device is shown; Figure 5 A schematic diagram of the structure of the horse rack is shown; Figure 6 The schematic diagram of the structure at the inner ring groove is shown; Figure 7 A schematic diagram of the structure of a support ring with a smooth transition and tapered outer diameter is shown; Figure 8 A schematic diagram of the structure of a support ring with a stepped outer diameter transition and tapered shape is shown; Fig. 9 A schematic diagram of the structure of the active part is shown; Fig.10 A schematic structural diagram of the driven part is shown.

[0021] Legend: 100, special-shaped horse rod; 110, arc-shaped part; 120, positioning part; 130, inner ring groove; 200, horse frame; 210, bottom plate; 220, supporting side plate; 221, positioning groove; 300, forging body; 400, pressure roller; 500, supporting gasket; 510, starting end; 520, ending end; 530, notch; 600, driving part; 610, active part; 611, output motor; 612, output shaft; 613, active roller; 620, driven part; 621, fixing rod; 622, sleeve; 623, panel; 624, driven roller; 625, spring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0023] In view of the problems in the prior art of the production process of small forgings with special inner diameters, the inability to punch large holes in the blanks, the inability to open deep grooves in the inner diameters, and the poor filling effect of the forgings, the present application changes the traditional cylindrical structure of the horse rod and adopts a cross-sectional structure combining an arc and an inverted triangle, which can limit the rotation of the horse rod so that the horse rod does not rotate with the forging. In other words, the expansion speed of the forging is slow. When the forgings are of the same size, the grooves opened are deeper than those of the traditional hole expansion method, so as to be suitable for small forgings with special inner diameters.

[0024] Figure 1 A schematic structural diagram of a special-shaped horse stick 100 is shown; Figure 1 In the invention, the special-shaped horse rod comprises an arc portion 110 arranged relative to the forging and a positioning portion 120 connected to the other end of the arc portion 110. On the plumb cross section, the positioning portion 120 is a conical structure, and the pointed end of the cone is far away from the arc portion 110. The new special-shaped horse rod 100 is formed by the arc portions 110 and the positioning portions 120 connected in sequence along one direction. The arc portion 110 is used to cooperate with the forging for support, and the positioning portion 120 can limit the special-shaped horse rod 100 from rotating due to the rotational driving force of the forging to maintain stability. The arc portion 110 of the special-shaped horse rod 100 is provided with an inner annular groove 130, which extends along the trajectory of the arc portion 110 and is located on the special-shaped horse rod. An opening is formed at the side end of the rod 100; the setting of the inner annular groove 130 can cooperate with the pressure roller to form a special-shaped inner diameter shape; on the plumb cross-section, the area of ​​the positioning portion 120 is larger than the area of ​​the arc-shaped portion 110; that is, the cross-sectional area of ​​the positioning portion 120 is larger than the cross-sectional area of ​​the arc-shaped portion 110, so that the positioning portion 120 has a certain height, and the pointed cone end of the positioning portion 120 is away from the neutral axis of the special-shaped horse stick 100 to enhance the anti-bending effect when pressed directly from above; the pointed cone end of the positioning portion 120 has a width so that it forms a trapezoidal structure as a whole; the pointed cone end of the positioning portion 120 has a width, so that the special-shaped horse stick 100 has a certain torsion resistance to resist the rotational force of the forging on the special-shaped horse stick 100.

[0025] Figure 2 A schematic diagram of the structure of a side section of a special-shaped horse stick 100 is shown; Figure 3 A schematic diagram of a deformed structure of a special-shaped horse stick 100 is shown; Figure 2 and Figure 3 In the figure, since the stress-bearing end of the special-shaped horse rod 100 is provided with an inner annular groove 130, the inner annular groove 130 is the weakest part. When the vertical force is pressed downward, the inner annular groove 130 is most easily bent, that is, the special-shaped horse rod 100 has a tendency to be bent. At the same time, the end walls on both sides of the special-shaped horse rod 100 will deform slightly toward the inner annular groove 130, that is, the weak part, when under pressure, so that the overall deformation of the inner annular groove 130 is reduced, and the inner diameter shape of the forging is changed.

[0026] It should be noted that, in this embodiment, Figure 2 As shown, the side cross-section shape of the inner ring groove 130 is a schematic diagram of a trapezoidal structure that is wide on the outside and narrow on the inside; however, in some other embodiments, the shape of the inner ring groove 130 is not restricted; the present application would like to emphasize that when the special-shaped horse stick 100 has an inner ring groove 130, axial deformation may occur without being restricted by shape.

[0027] Figure 4 A schematic structural diagram of a hole expansion device is shown; Figure 4 In the present invention, the hole expanding device comprises a special-shaped horse stick 100, a horse frame 200 carrying the special-shaped horse stick 100, a forging body 300 sleeved on the special-shaped horse stick 100, and a pressure roller 400 cooperating with the special-shaped horse stick 100 to press the forging body 300; during use, the forging body 300 is sleeved outside the special-shaped horse stick 100, and then the special-shaped horse stick 100 is mounted above the horse frame 200 to make the forging body 300 suspended in the air, and then the pressure roller 400 is driven to press the forging body 300 and rotate, so as to drive the forging body 300 to rotate and expand the hole.

[0028] Figure 5 A schematic structural diagram of a horse rack 200 is shown; Figure 5 In the figure, the horse frame 200 includes a horizontally arranged bottom plate 210 and two supporting side plates 220 vertically installed on the bottom plate 210. The two supporting side plates 220 are arranged at intervals, and each supporting side plate 220 is provided with a positioning groove 221 corresponding to the positioning portion 120; the special-shaped horse stick 100 is mounted on the horse frame 200, so that the positioning portion 120 is correspondingly inserted into the positioning groove 221, and the two supporting side plates 220 support the special-shaped horse stick 100 so that the forging body 300 mounted on the horse frame 200 is suspended in the air.

[0029] Figure 6A schematic diagram of the structure at the inner annular groove 130 is shown; a support gasket ring 500 is sleeved on the inner annular groove 130, and the inner diameter of the support gasket ring 500 is concentrically arranged with the arc-shaped portion 110; a driving portion 600 for driving the support gasket ring 500 to rotate around its center is also arranged on the horse frame 200, and the driving portion 600 includes an active portion 610 and a driven portion 620 arranged on both sides of the support gasket ring 500; the support gasket ring 500 is driven to rotate around its center by squeezing from both sides inside and outside through the active portion 610 and the driven portion 620, and the support gasket ring 500 is sleeved on the inner annular groove 130, which can fill the inner annular groove 130 to support the side walls on both sides to prevent the side walls on both sides from deforming inward.

[0030] In one embodiment, Figure 7 A schematic diagram of the structure of a support ring 500 with a smoothly transitioned and tapered outer diameter is shown; Figure 7 In the embodiment, the support washer 500 has a starting end 510, an ending end 520, and a notch 530 separating the starting end 510 and the ending end 520. Along the path from the starting end 510 to the ending end 520, the outer diameter of the support washer 500 gradually shrinks and smoothly transitions. When the support washer 500 rotates around its center, it changes between an initial state and an ending state. In the initial state, the starting end 510 of the support washer 500 is inserted into the inner ring groove 130 and corresponds to the forging body 300. The outer diameter of the starting end 510 is adapted to the outer diameter of the inner ring groove 130. In the ending state, the support washer The notch 530 of the ring 500 overlaps with the inner ring groove 130 and corresponds to the forging body 300; in use, in the initial state, the starting end 510 of the support gasket ring 500 can be inserted into the inner ring groove 130 and prop up the side wall of the inner ring groove 130 to prevent the inner ring groove 130 from shrinking, and as the forging is pressed in, the support gasket ring 500 rotates around its center and the outer diameter of the part entering the inner ring groove 130 is continuously reduced to match the forging body 300 with an increasing inner diameter, and the support gasket ring 500 cooperates with the forging body 300 to ensure that the inner ring groove 130 is always filled and supported.

[0031] In another embodiment, Figure 8 A schematic diagram of the structure of a support ring 500 with a stepped outer diameter transition and a tapered outer diameter is shown; Figure 8In the embodiment, the support washer 500 has a starting end 510, an ending end 520, and a notch 530 separating the starting end 510 and the ending end 520. Along the path from the starting end 510 to the ending end 520, the outer diameter of the support washer 500 gradually shrinks and transitions in steps. When the support washer 500 rotates around its center, it changes between an initial state and an ending state. In the initial state, the starting end 510 of the support washer 500 is inserted into the inner ring groove 130 and corresponds to the forging body 300. The outer diameter of the starting end 510 is adapted to the outer diameter of the inner ring groove 130. In the ending state, the support washer The notch 530 of the ring 500 overlaps with the inner ring groove 130 and corresponds to the forging body 300; in use, in the initial state, the starting end 510 of the support gasket ring 500 can be inserted into the inner ring groove 130 and prop up the side wall of the inner ring groove 130 to prevent the inner ring groove 130 from shrinking, and as the forging is pressed in, the support gasket ring 500 rotates around its center and the outer diameter of the part entering the inner ring groove 130 is continuously reduced to match the forging body 300 with an increasing inner diameter, and the support gasket ring 500 cooperates with the forging body 300 to ensure that the inner ring groove 130 is always filled and supported.

[0032] It should be noted that, in this embodiment, Figure 8 A two-step transition taper is shown, but in some other embodiments, the specific number of steps of the step transition is not limited.

[0033] Fig. 9 shows a schematic structural diagram of the active part 610; Fig. 9 In the embodiment, the active part 610 includes an output motor 611 installed on the horse frame 200, the output end of the output motor 611 is connected to an output shaft 612, the other end of the output shaft 612 is connected to an active roller 613, and the active roller 613 contacts the inner wall of the support gasket 500; when the output motor 611 is started, the output end of the output motor 611 can drive the output shaft 612 and the active roller 613 to rotate, and when the active roller 613 rotates, it can contact the support gasket 500 and drive the support gasket 500 to rotate; and in some other embodiments, the active roller 613 has barbs on the outside, and when the active roller 613 rotates, the barbs contact the support gasket 500 and drive it to rotate; by setting the barbs on the active roller 613, the relative friction between the active roller 613 and the inner side of the support gasket 500 can be increased when the active roller 613 rotates, so as to ensure that the support gasket 500 continues to rotate.

[0034] Fig.10 Schematic diagram of the structure of the driven part 620 is shown; Fig.10In the figure, the driven part 620 includes a fixed rod 621 installed on the horse frame 200 and a sleeve 622 connected to the other end of the fixed rod 621, a panel 623 is inserted into the open end of the sleeve 622, and a driven roller 624 is rotatably installed at the end of the panel 623 away from the opening, and a spring 625 is installed in the sleeve 622. The spring 625 is in a compressed state and drives the driven roller 624 to contact the outer wall of the support gasket 500; during use, driven by the elastic force of the spring 625, the panel 623 pushes the driven roller 624 to contact the support gasket 500, and the driven roller 624 can cooperate with the active roller 613 to clamp the support gasket 500 to prevent the support gasket 500 from falling off, and at the same time, the driven roller 624 can rotate in conjunction with the rotation of the support gasket 500 to achieve following.

[0035] Continue to see Figure 6 At least two groups of driving parts 600 are provided, which are arranged at intervals along the rotation path of the support gasket ring 500, and the path distance between two adjacent groups of driving parts 600 is greater than the gap 530; that is to say, at least two groups of driving parts 600 can enable the support gasket ring 500 to stably transition the gap 530 during rotation, that is, in any state, there is at least one group of driving parts 600 acting on the support gasket ring 500 to avoid the support gasket ring 500 from falling off as a whole due to the influence of the gap 530.

[0036] It should be noted that, for the above-mentioned stepped transition type support gasket ring 500 and the smooth transition type support gasket ring 500, the rotation frequencies of the driving unit 600 are different; for the stepped transition type support gasket ring 500, the driving unit 600 can drive the support gasket ring 500 to rotate at intervals to correspond to the steps that need to be transitioned; for the smooth transition type support gasket ring 500, the driving unit 600 can drive the support gasket ring 500 to rotate at a constant speed to cooperate with the forging body 300 to always completely fill the inner ring groove 130.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Special-shaped horse stick, characterized in that: The special-shaped horse rod (100) comprises an arc-shaped portion (110) arranged relative to the forging, and a positioning portion (120) connected to the other end of the arc-shaped portion (110). In the plumb cross section, the positioning portion (120) is a conical structure, and the pointed end of the cone is away from the arc-shaped portion (110). An inner annular groove (130) is provided on the arc-shaped portion (110) of the special-shaped horse rod (100).

2. The special-shaped horse stick according to claim 1, characterized in that: The inner annular groove (130) extends along the trajectory of the arc-shaped portion (110) and forms an opening at the side end of the special-shaped horse rod (100).

3. The special-shaped horse stick according to claim 2, characterized in that: On a plumb cross section, the area of ​​the positioning portion (120) is greater than the area of ​​the arc-shaped portion (110).

4. The special-shaped horse stick according to claim 3, characterized in that: The pointed cone end of the positioning portion (120) has a width such that the positioning portion (120) forms a trapezoidal structure as a whole.

5. A hole expanding device, comprising the special-shaped horse stick according to any one of claims 1 to 4, characterized in that: It also includes a horse frame (200) for carrying a special-shaped horse stick, a forging body (300) sleeved on the special-shaped horse stick, and a pressing roller (400) for cooperating with the special-shaped horse stick to press the forging body (300).

6. The hole expanding device according to claim 5, characterized in that: A support gasket ring (500) is sleeved on the inner annular groove (130); the inner diameter of the support gasket ring (500) is arranged concentrically with the arc-shaped portion (110); the support gasket ring (500) has a starting end (510), an ending end (520), and a notch (530) separating the starting end (510) and the ending end (520); and the outer diameter of the support gasket ring (500) gradually decreases along the path from the starting end (510) to the ending end (520); The support ring (500) changes between an initial state and a final state when rotating around its center; In an initial state, the starting end (510) of the support gasket ring (500) is inserted into the inner ring groove (130) and corresponds to the forging body (300), and the outer diameter of the starting end (510) is matched with the outer diameter of the inner ring groove (130); In the final state, the notch (530) of the support gasket ring (500) overlaps with the inner ring groove (130) and corresponds to the forging body (300).

7. The hole expanding device according to claim 6, characterized in that: The outer diameter of the support gasket ring (500) is gradually reduced and smoothly transitioned.

8. The hole expanding device according to claim 6, characterized in that: The outer diameter of the support gasket ring (500) is gradually reduced and has a step transition.

9. The hole expanding device according to claim 7 or 8, characterized in that: The horse frame (200) is also provided with a driving part (600) for driving the supporting washer (500) to rotate around its center, and the driving part (600) comprises an active part (610) and a driven part (620) arranged on both sides of the supporting washer (500); The active part (610) comprises an active roller (613) which abuts against the inner wall of the supporting pad ring (500); The driven part (620) comprises a driven roller (624) that abuts against the outer wall of the supporting gasket ring (500).

10. The hole expanding device according to claim 9, characterized in that: The active part (610) further comprises an output motor (611) mounted on the horse frame (200), the output end of the output motor (611) being connected to an output shaft (612), and the active roller (613) being connected to the other end of the output shaft (612); The driven part (620) further comprises a fixing rod (621) mounted on the horse frame (200) and a sleeve box (622) connected to the other end of the fixing rod (621); a panel (623) is inserted into the open end of the sleeve box (622); and the driven roller (624) is rotatably mounted on an end of the panel (623) away from the opening; A spring (625) is installed in the sleeve box (622), and the spring (625) is in a compressed state and drives the driven roller (624) to always contact the outer wall of the support gasket ring (500) during the rotation of the support gasket ring (500); The active roller (613) has barbs on its exterior, and when the active roller (613) rotates, the barbs abut against the supporting pad ring (500) and drive the supporting pad ring (500) to rotate; At least two groups of the driving parts (600) are provided, and are arranged at intervals along the rotation path of the supporting gasket ring (500), and the path distance between two adjacent groups of driving parts (600) is greater than the notch (530); The horse frame (200) comprises a horizontally arranged bottom plate (210) and two supporting side plates (220) vertically mounted on the bottom plate (210); the two supporting side plates (220) are arranged at intervals, and each supporting side plate (220) is provided with a positioning groove (221) corresponding to the positioning portion (120); in the installed state, the positioning portion (120) is inserted into the positioning groove (221).

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