Connecting rod type diameter-adjustable self-centering sheet metal part inner hole grinding tool

Abstract

The utility model discloses a connecting rod type diameter-adjustable self-centering sheet metal part inner hole polishing tool which comprises a center rod and a front end rod which are integrally formed, a plurality of containing grooves annularly formed in the edge of the front end rod in the axial direction of the front end rod, and connecting rod polishing assemblies rotationally connected with the front end rod and contained in the containing grooves in a one-to-one correspondence mode. The limiting adjusting ring is in threaded connection with the center rod and the front end rod and is used for adjusting the unfolding diameter of the connecting rod polishing assembly; the connecting rod polishing assembly comprises a first connecting rod and a second connecting rod of which one ends are in pin joint with the front end rod, and a polishing block which is in pin joint with the other ends of the first connecting rod and the second connecting rod; the first connecting rod, the second connecting rod, the grinding block and the front end rod jointly form a parallelogram. And the first connecting rod and the second connecting rod are accommodated in the accommodating groove. By means of the scheme, the device has the advantages of being simple in structure, reliable in adjustment, high in flexibility and the like, and has high practical value and popularization value in the technical field of machine manufacturing.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a connecting rod type diameter-adjustable self-centering sheet metal part inner hole grinding tool. Background Art

[0002] The grinding tools of this technology are mainly used for high-precision grinding of deep hole walls and inner holes of sheet metal parts. As we all know, the hole walls of deep hole parts often have vibration marks due to abnormal vibration of the turning tool bar during processing, which affects the surface quality of the deep hole wall. Therefore, it is often necessary to add a boring process to improve the surface quality of the hole wall. At present, some cylindrical parts require drilling on the wall part, and the burrs left by drilling are difficult to remove on the inner side of the wall. A special grinding tool for the inner diameter of the wall is needed to remove the burrs.

[0003] In addition, sheet metal parts processing procedures usually include unfolding parts cutting, unfolding parts grinding, parts plastic forming and trimming, etc. Among them, the unfolding parts cutting process usually uses laser cutting or CNC milling methods. Usually, the processing of unfolded parts requires leaving process connection materials to prevent the parts from being displaced or bounced by gas blowing or tool friction, resulting in shape deviation and wear. The existing process often uses radial grinding tools with fixed diameters or manual filing, which easily leads to poor inner circle roundness and low processing efficiency.

[0004] Therefore, there is an urgent need to propose a connecting rod-type diameter-adjustable self-centering sheet metal part inner hole grinding tool with simple structure, reliable adjustment and strong flexibility. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide a connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool, the technical solution adopted by the utility model is as follows:

[0006] A connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool, comprising an integrally formed center rod and front end rod, a plurality of receiving grooves annularly arranged on the edge of the front end rod along the axial direction of the front end rod, a connecting rod grinding assembly rotatably connected to the front end rod and received in the receiving grooves one by one, and a limit adjustment ring threadedly connected to the center rod and the front end rod and used to adjust the expansion diameter of the connecting rod grinding assembly;

[0007] The connecting rod grinding assembly includes a first connecting rod and a second connecting rod, one end of which is pin-connected to the front end rod, and a grinding block pin-connected to the other end of the first connecting rod and the second connecting rod; the first connecting rod, the second connecting rod, the grinding block and the front end rod together form a parallelogram; the first connecting rod and the second connecting rod are stored in a storage groove.

[0008] Preferably, the grinding block is arc-shaped.

[0009] Furthermore, two first connecting ears are arranged on the inner side of the grinding block; the first connecting ears are connected to the first connecting rod and the second connecting rod in a one-to-one correspondence.

[0010] Furthermore, a first pin is respectively arranged between the first connecting rod and the first connecting ear, and between the second connecting rod and the first connecting ear.

[0011] Furthermore, a pin connecting ear receiving groove connected to the receiving groove is formed on the front end rod; the first pin and the first connecting ear are received in the pin connecting ear receiving groove.

[0012] Furthermore, a plurality of pin holes are provided in a ring shape on the front end rod; the pin holes are connected to the receiving grooves; and the first connecting rod, the second connecting rod and the pin holes are connected by pins.

[0013] Furthermore, an adjustment limit slider is slidably arranged in the storage groove; a sliding connection block is arranged on the top of the adjustment limit slider; a second inclined portion is arranged at the front end of the adjustment limit slider; a groove ring is arranged on the inner side of the limit adjustment ring; the sliding connection block is sleeved in the groove ring; a first inclined portion is arranged at the end of the first connecting rod and on the side close to the front end rod; the first inclined portion is extrusion-connected with the second inclined portion.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] (1) The utility model provides a parallelogram-shaped first connecting rod, a second connecting rod, a grinding block and a front end rod, and after unfolding, the grinding block is used to grind the deep hole wall and the inner hole of the sheet metal part blank; in addition, after the first connecting rod and the second connecting rod are stored in the storage groove, they can also be easily moved in and out of the deep hole wall and the inner hole of the sheet metal part blank, and the grinding operation is flexible and reliable.

[0016] (2) The utility model sets a limit adjustment ring or (a limit adjustment ring and an adjustable limit slider), which can adjust the expanded diameter of the connecting rod grinding assembly by rotating the limit adjustment ring, realizes self-centering according to the pre-set grinding diameter and relies on the working characteristics of the tool, ensures that the roundness, diameter and other parameters of the inner hole of the sheet metal part meet the process requirements, and speeds up the completion of the process.

[0017] (3) The center rod of the utility model is connected to an electric or pneumatic tool, and the grinding block rotates around the center axis of the tool to generate centrifugal force, so that the grinding block contacts the inner hole material of the sheet metal part for grinding. When multiple grinding blocks are subjected to relatively uniform contact force, the axis of the grinding tool coincides with the center of the inner hole of the part. When deviating from the center of the inner hole of the part, the contact force of different grinding blocks differs, and the grinding tool will be automatically pushed to the side with less force, thereby achieving self-centering.

[0018] In summary, the utility model has the advantages of simple structure, reliable adjustment, strong flexibility, etc., and has high practical value and promotion value in the field of mechanical manufacturing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope of protection. For those skilled in the art, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the utility model in an expanded state.

[0021] Figure 2 It is a structural schematic diagram of the storage state of the utility model.

[0022] Figure 3 It is a schematic diagram of the structure of removing the first angle of the grinding block in the utility model.

[0023] Figure 4 It is a schematic diagram of the structure of removing the second angle of the grinding block in the utility model.

[0024] Figure 5 It is a structural schematic diagram of the connecting rod grinding assembly and the adjusting limit sliding block in the utility model.

[0025] Figure 6 It is a cross-sectional schematic diagram of the storage state of the utility model.

[0026] Figure 7 It is a cross-sectional schematic diagram of the utility model in an unfolded state.

[0027] In the above drawings, the component names corresponding to the reference numerals are as follows:

[0028] 1. Center rod; 2. Front end rod; 3. Storage groove; 4. Connecting rod grinding assembly; 5. Limit adjustment ring; 6. Adjustment limit slider; 21. Pin hole; 31. Pin connecting ear storage groove; 41. First connecting rod; 42. Second connecting rod; 43. Grinding block; 411. First pin; 412. First inclined portion; 431. First connecting ear; 51. Groove ring; 61. Sliding connecting block; 62. Second inclined portion. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of this application clearer, the utility model is further described below in conjunction with the accompanying drawings and embodiments, and the implementation methods of this utility model include but are not limited to the following embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] In this embodiment, the term "and / or" is merely a term used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0031] The terms "first" and "second" in the description and claims of this embodiment are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0032] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0033] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0034] like Figures 1 to 7 As shown, this embodiment provides a connecting rod type diameter adjustable self-centering sheet metal part inner hole grinding tool, which grinds deep hole wall and inner hole of sheet metal part blank, etc. Before entering the deep hole wall and inner hole of sheet metal part blank, the grinding tool is in a storage state, and during grinding, the grinding tool is in an unfolded state.

[0035] Specifically, the grinding tool includes an integrally formed center rod 1 and front end rod 2, a plurality of receiving grooves 3 annularly opened on the edge of the front end rod 2 along the axial direction of the front end rod 2, a connecting rod grinding assembly 4 rotatably connected to the front end rod 2 and received in the receiving grooves 3 one by one, and a limit adjustment ring 5 threadedly connected to the center rod 1 and the front end rod 2 and adjusting the unfolded diameter of the connecting rod grinding assembly 4. The center rod 1 is connected to an electric or pneumatic tool and drives the center rod 1 to rotate. The grinding tool rotates around its own central axis to generate centrifugal force, so that the connecting rod grinding assembly 4 is unfolded and grinds the wall of a deep hole and the inner hole of a sheet metal part blank.

[0036] In this embodiment, the connecting rod grinding assembly 4 includes a first connecting rod 41 and a second connecting rod 42, one end of which is pin-connected to the front end rod 2, and an arc-shaped grinding block 43, which is pin-connected to the other end of the first connecting rod 41 and the second connecting rod 42. The first connecting rod 41, the second connecting rod 42, the grinding block 43 and the front end rod 2 together form a parallelogram. Two first connecting ears 431 are arranged on the inner side of the grinding block 43, and the first connecting ears 431 are connected to the first connecting rod 41 and the second connecting rod 42 in a one-to-one correspondence. In addition, a first pin 411 is respectively arranged between the first connecting rod 41 and the first connecting ear 431, and between the second connecting rod 42 and the first connecting ear 431.

[0037] In this embodiment, in order to achieve reliable storage, a pin connection ear storage groove 31 connected to the storage groove 3 is provided on the front end rod 2, the first connecting rod 41 and the second connecting rod 42 are stored in the storage groove 3, and the first pin 411 and the first connecting ear 431 are stored in the pin connection ear storage groove 31. In this way, it can be ensured that the connecting rod grinding assembly 4 can enter the hole to be ground more conveniently.

[0038] A plurality of pin holes 21 are provided in a ring shape on the front end rod 2, and the pin holes 21 are connected to the storage groove 3. The ends of the first connecting rod 41 and the second connecting rod 42 are connected to the pin holes 21 by pins. When displaying, the limit adjustment ring 5 is squeezed on the outer edge of the first connecting rod 41 to adjust the diameter. For example, when the expansion diameter of the connecting rod grinding assembly 4 is required to be larger, the limit adjustment ring 5 is rotated and moved toward the center rod 1. In addition, when the expansion diameter of the connecting rod grinding assembly 4 is required to be smaller, the limit adjustment ring 5 is rotated and moved toward the front end rod 2.

[0039] The above technical solution uses the front end inner wall of the limit adjustment ring 5 and the first connecting rod 41 to adjust the diameter of the grinding expansion. In addition, this embodiment has another adjustment support solution, which is as follows:

[0040] An adjustable limit slider 6 is slidably arranged in the storage groove 3, a sliding connection block 61 is arranged on the top of the adjustable limit slider 6, a groove ring 51 is arranged on the inner side of the limit adjustment ring 5, and the sliding connection block 61 is sleeved in the groove ring 51. When the limit adjustment ring 5 is rotated, the adjustable limit slider 6 is pushed to move along the storage groove 3. In addition, a second inclined portion 62 is arranged at the front end of the adjustable limit slider 6, and a first inclined portion 412 is arranged at the end of the first connecting rod 41 and on the side close to the front end rod 2, and the first inclined portion 412 is extruded and connected with the second inclined portion 62. The diameter adjustment method of this scheme is the same as the adjustment method of the above scheme, only the extrusion support component is different, and the adjustment process will not be repeated here.

[0041] The above embodiments are only preferred embodiments of the present utility model and are not intended to limit the protection scope of the present utility model. Any changes that adopt the design principles of the present utility model and are made through non-creative labor on this basis should fall within the protection scope of the present utility model.

Claims

1. A connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool, characterized in that: The invention comprises an integrally formed center rod (1) and a front end rod (2), a plurality of receiving grooves (3) annularly arranged on the edge of the front end rod (2) along the axial direction of the front end rod (2), a connecting rod grinding assembly (4) rotatably connected to the front end rod (2) and received in the receiving grooves (3) one by one, and a limit adjustment ring (5) threadedly connected to the center rod (1) and the front end rod (2) and used to adjust the expansion diameter of the connecting rod grinding assembly (4); The connecting rod grinding assembly (4) comprises a first connecting rod (41) and a second connecting rod (42) each having one end pin-connected to the front end rod (2), and a grinding block (43) pin-connected to the other ends of the first connecting rod (41) and the second connecting rod (42); the first connecting rod (41), the second connecting rod (42), the grinding block (43) and the front end rod (2) together form a parallelogram; the first connecting rod (41) and the second connecting rod (42) are received in the receiving groove (3).

2. A connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool according to claim 1, characterized in that: The grinding block (43) is in an arc shape.

3. A connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool according to claim 1 or 2, characterized in that: Two first connecting ears (431) are arranged on the inner side of the grinding block (43); the first connecting ears (431) are connected to the first connecting rod (41) and the second connecting rod (42) in a one-to-one correspondence.

4. A connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool according to claim 3, characterized in that: A first pin (411) is respectively arranged between the first connecting rod (41) and the first connecting ear (431), and between the second connecting rod (42) and the first connecting ear (431).

5. A connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool according to claim 4, characterized in that: The front end rod (2) is provided with a pin connecting ear receiving groove (31) which is in communication with the receiving groove (3); the first pin (411) and the first connecting ear (431) are received in the pin connecting ear receiving groove (31).

6. The connecting rod type diameter adjustable self-centering sheet metal parts inner hole grinding tool according to claim 1, characterized in that: The front end rod (2) is provided with a plurality of pin holes (21) in a ring shape; the pin holes (21) are connected to the receiving groove (3); and the first connecting rod (41), the second connecting rod (42) and the pin holes (21) are connected by pins.

7. The connecting rod type diameter adjustable self-centering sheet metal part inner hole grinding tool according to claim 1, characterized in that: An adjustable limit slider (6) is slidably arranged in the receiving groove (3); a sliding connection block (61) is arranged on the top of the adjustable limit slider (6); a second inclined portion (62) is arranged at the front end of the adjustable limit slider (6); a groove ring (51) is arranged on the inner side of the limit adjustment ring (5); the sliding connection block (61) is sleeved in the groove ring (51); a first inclined portion (412) is arranged at the end of the first connecting rod (41) and on the side close to the front end rod (2); the first inclined portion (412) is extruded and connected with the second inclined portion (62).

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