Valve rod body straightening device

Abstract

The utility model relates to a valve rod body straightening device which comprises an equipment main body, a working platform is arranged on the equipment main body, a supporting seat used for placing a valve and a measuring assembly used for measuring the curvature of a valve rod body are arranged on the working platform, and the measuring assembly is located on one side of the supporting seat. The measuring assembly comprises a detachable instrument capable of adjusting the detection position, a groove used for containing a valve rod body is formed in the supporting seat, a position-adjustable roller assembly is arranged in the groove, the roller assembly comprises a roller body, and the outer surface of the roller body makes rolling contact with the outer surface of the valve rod body. The main purpose of the utility model is to provide the valve rod body straightening device which can reduce the friction coefficient when the valve rod body rotates, reduce the labor intensity of workers and make the detection result more accurate.

Description

Technical Field

[0001] The utility model relates to a straightening machine, in particular to a valve stem straightening device. Background Art

[0002] The valve is responsible for inputting air into the engine and discharging the exhaust gas after combustion; it is one of the key components that affect the reliability and safety of the engine. The valve includes a stem and a head. During the production and processing process, the stem of the valve blank is prone to deformation after heat treatment, so a straightening device is needed to straighten the valve stem. The current valve-specific straightening equipment includes a valve stem support seat, a measuring instrument, and a punch head for straightening. A groove for placing the valve stem is provided on the support seat. When the valve rotates, there is sliding friction between the valve stem and the groove wall, and the friction force is large. Over time, the wear on the support seat is also severe, resulting in a shortened service life of the support seat and increased use and maintenance costs; and due to the large friction force, the force required for the valve to rotate also increases. If manual rotation is used, it will be more labor-intensive and labor intensity will increase; if an electric drive structure is used to drive the valve to rotate, it will consume more energy. Therefore, it is necessary to design a straightening machine that can reduce the friction coefficient between the valve stem and the groove. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a valve stem straightening device which can reduce the friction coefficient of the valve stem when it rotates, reduce the intensity of manual labor, and provide more accurate detection results.

[0004] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0005] A valve stem straightening device comprises an equipment body, a working platform is provided on the equipment body, a support seat for placing the valve and a measuring component for measuring the curvature of the valve stem are provided on the working platform, the measuring component is located on one side of the support seat, the measuring component comprises a detachable instrument with an adjustable detection position, a groove for placing the valve stem is provided on the support seat, a position-adjustable roller component is provided in the groove, the roller component comprises a roller body, the outer surface of the roller body is in rolling contact with the outer surface of the valve stem.

[0006] Furthermore, the roller assembly also includes a connecting shaft, and both ends of the roller body are rotatably mounted on the connecting shaft. Both ends of the connecting shaft are respectively fixed with sliding blocks, and the sliding blocks are connected to the adjustment assembly, and the adjustment assembly is used to adjust the position of the sliding block in the horizontal direction.

[0007] Furthermore, the adjusting assembly includes an adjusting bolt and an adjusting nut, the adjusting bolt is axially relatively fixed and circumferentially rotatably installed on a support seat, and the axis of the adjusting bolt is arranged in a horizontal direction perpendicular to the axis of the valve stem, the sliding block is slidably sleeved on the outside of the adjusting bolt, and adjusting nuts are threadedly sleeved on both sides of the sliding block, and the two adjusting nuts are respectively abutted against the sliding block.

[0008] Furthermore, a receiving groove for receiving the roller assembly is provided in the support seat, an open groove connected to the receiving groove is opened on the side wall of the groove, the roller body is located in the receiving groove, and the roller body part is located outside the open groove and is in rolling contact with the outer surface of the valve stem.

[0009] Furthermore, a clearance groove is processed at the position of the support seat corresponding to the sliding block, the clearance groove is connected to the accommodating groove, the clearance groove is extended in the horizontal direction, and the length of the clearance groove is greater than the stroke length of the sliding block in the horizontal direction, and one end of the sliding block extends to the outside through the clearance groove and is connected to the adjusting bolt.

[0010] Furthermore, the measuring assembly also includes a mounting rod and a connecting piece, the mounting rod is fixedly connected to the instrument, and a fixing seat is provided on the working platform. One end of the connecting piece is connected to the mounting rod, and the other end is connected to the fixing seat via a fastener. After the instrument is installed, the axis of its detection head is perpendicular to the axis of the valve stem, and the detection head is in contact with the valve stem.

[0011] Furthermore, a limit block for limiting the installation position of the instrument is fixedly provided on the working platform.

[0012] Furthermore, a liftable punching head is provided above the working platform, and the punching head is connected to a lifting control device.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, a roller body with adjustable position is arranged in the support seat, and the roller body is in rolling contact with the valve stem body, which can reduce the friction coefficient when the valve stem body rotates, reduce wear and friction resistance; at the same time, the position of the roller body is adjustable, so that when the outer diameter of the roller body is reduced due to long-term wear and thus cannot be in rolling contact with the valve stem body, the position of the roller body can be adjusted to make it in rolling contact with the valve stem body again, effectively reducing the use cost and extending the service life; in addition, the measuring component is designed to be a structure that is easy to disassemble and assemble and has an adjustable detection position, which is not only convenient for maintenance and replacement, but also can flexibly adjust the detection position to ensure high accuracy of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a valve stem straightening device of the utility model;

[0015] Figure 2 It is a front view of a valve stem straightening device of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure cut along the BB direction;

[0017] Figure 4 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0018] Figure 5 It is a front view of a support seat in a valve stem straightening device of the utility model;

[0019] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure cut along the CC direction;

[0020] Among them, 1. Equipment body; 2. Working platform; 21. Through slot; 22. Fixed seat; 3. Positioning plate; 4. Support seat; 41. Groove; 42. Bump; 43. Make way slot; 44. Open slot; 45. Accommodating slot; 5. Roller assembly; 51. Sliding block; 52. Connecting shaft; 53. Roller body; 6. Adjustment assembly; 61. Adjustment bolt; 62. Adjustment nut; 7. Measuring assembly; 71. Instrument; 72. Mounting rod; 73. Connector; 74. Fastener; 8. Punch head; 9. Limit block. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0023] Example

[0024] like Figure 1 , Figure 2 and Figure 3As shown, a valve stem straightening device of this embodiment is used to straighten the valve blank stem after heat treatment. The straightening machine includes an equipment body 1, on which a working platform 2 is provided, on which a support seat 4 for placing the valve and a measuring component 7 for measuring the curvature of the valve stem are provided. The support seat 4 has two, which are arranged at intervals along the axis of the valve stem. The measuring component 7 is located on one side of the support seat 4, and the detection head of the measuring component 7 is in contact with the valve stem. The measuring component 7 includes a meter 71 that is detachable and adjustable in detection position. The meter 71 is a common instrument in the prior art. The detection head of the meter 71 is of a retractable design. If the stem has a curvature, the detection head will be retracted and retracted during the rotation of the valve stem, thereby causing the value of the meter 71 to change for observation by the staff.

[0025] The support seat 4 is provided with a groove 41 for placing the valve stem, and a roller assembly 5 is arranged in the groove 41. Specifically, in this embodiment, the roller assembly 5 has two symmetrically distributed roller assemblies 5, and the two roller assemblies 5 have the same structure. The roller assembly 5 includes a roller body 53, and the outer surface of the roller body 53 is in rolling contact with the outer surface of the valve stem. With this structural design, when the valve stem to be straightened is placed in the groove 41 of the support seat 4, the surface of the roller body 53 is in rolling contact with the surface of the valve stem, so that when the valve stem rotates, the roller body 53 is driven to rotate accordingly, and the friction of the rolling contact is small, which can reduce the force required for the rotation of the valve stem and also reduce the wear on the surface of the roller body 53. When the roller body 53 is used for a long time and the surface is worn more, the gap between the two roller bodies 53 on the same support seat 4 will become larger, causing the valve stem position to drop or even a gap between the roller body 53 and the roller body 53, resulting in failure of the rolling contact. In order to avoid this situation, the roller assembly 5 is designed as a position-adjustable structure in this embodiment.

[0026] Specifically, refer to Figure 4 and Figure 5 As shown, the roller assembly 5 also includes a connecting shaft 52, and the two ends of the roller body 53 are rotatably mounted on the connecting shaft 52 through bearings. The two ends of the connecting shaft 52 are respectively fixedly connected with sliding blocks 51, and the sliding block 51 is connected to the adjustment assembly 6. The adjustment assembly 6 is used to adjust the position of the sliding block 51 in the horizontal direction. In this embodiment, the adjustment assembly 6 includes an adjusting bolt 61 and an adjusting nut 62. The support seat 4 is fixed with a protrusion 42. The end of the adjusting bolt 61 close to the head is rotatably mounted on the protrusion 42 of the support seat 4, and the adjusting bolt 61 is axially fixed relative to the protrusion 42, and the axis of the adjusting bolt 61 is arranged in a horizontal direction perpendicular to the axis of the valve stem. The sliding block 51 is slidably sleeved on the outside of the adjusting bolt 61, and the adjusting nuts 62 are threadedly sleeved on both sides of the sliding block 51. The two adjusting nuts 62 are respectively abutted against the sliding block 51 to fix the position of the sliding block 51 on the adjusting bolt 61.

[0027] Specifically in this embodiment, refer to Figure 4 and Figure 6 As shown, a receiving groove 45 for receiving the roller assembly 5 is provided in the support seat 4, an opening groove 44 connected to the receiving groove 45 is provided on the side wall of the groove 41, and the roller body 53 is located in the receiving groove 45, and a part of the roller body 53 is located outside the opening groove 44 and in rolling contact with the outer surface of the valve stem. A clearance groove 43 is processed at the position corresponding to the sliding block 51 on the support seat 4, and the clearance groove 43 is connected to the receiving groove 45. The clearance groove 43 is arranged to extend in the horizontal direction, and the length of the clearance groove 43 is greater than the stroke length of the sliding block 51 in the horizontal direction. One end of the sliding block 51 extends to the outside through the clearance groove 43 and is connected to the adjusting bolt 61. The sliding block 51 slides along the adjusting bolt 61 and also moves along the length direction of the clearance groove 43. The horizontal position of the roller body 53 can be freely adjusted within a certain range. When the roller body 53 is worn or loosened after long-term use, the positions of the two roller bodies 53 are adjusted to make them close to each other until they are in rolling contact with the stem again. During adjustment, first loosen the adjusting nuts 62 on both sides of the corresponding sliding block 51 , then move the sliding block 51 to a suitable position, and then tighten the adjusting nuts 62 on both sides to make them respectively abut against the sliding block 51 to fix the position of the sliding block 51 .

[0028] In this embodiment, the measuring assembly 7 has two identical structures, and the two measuring assemblies 7 are arranged at intervals along the axis direction of the valve stem, and are used to measure the curvature of two different positions on the stem. The measuring assembly 7 also includes a mounting rod 72 and a connecting member 73, and the mounting rod 72 is fixedly connected to the instrument 71. The fixing method adopts the structure in the prior art, which will not be described in detail here. A fixing seat 22 is provided on the working platform 2, and one end of the connecting member 73 is connected to the mounting rod 72, and the other end is connected to the fixing seat 22 through a fastener 74. Specifically in this embodiment, the connecting member 73 is a U-shaped structure, and the arc groove end of the U-shaped structure is sleeved on the outside of the mounting rod 72. Holes are provided on the two right-angled sides of the U-shaped structure, and threaded holes are also provided on the fixing seat 22. The fastener 74 adopts a fastening bolt, and one end of the fastening bolt passes through the hole of the U-shaped structure and is threadedly connected to the threaded hole of the fixing seat 22 and is fastened by a nut. When the position of the meter 71 needs to be adjusted, loosen the fastening bolts, rotate the mounting rod 72, and then drive the meter 71 to rotate to fine-tune the detection position, ensuring that the detection heads of the two meters 71 are in the same position and can contact the valve stem at the same time. When the meter 71 needs to be repaired or replaced after long-term use, unscrew the fastening bolts to remove the meter 71 and the mounting rod 72, which is simple and convenient. After the meter 71 is installed, the axis of its detection head is perpendicular to the axis of the valve stem, and the detection head contacts the valve stem for easy detection.

[0029] In addition, in order to facilitate the installation of the meter 71 and avoid repeated position adjustment during installation, the work platform 2 of this embodiment is also fixed with a limit block 9 for limiting the installation position of the meter 71. The side of the limit block 9 close to the meter 71 is an arc surface that fits the outer surface of the meter 71. During installation, the installation position of the meter 71 can be preliminarily confirmed by only contacting the outer surface of the meter 71 with the limit block 9, and then the position of the meter 71 can be fixed by rotating the installation rod 72 to fine-tune the unknown of the meter 71.

[0030] A liftable punch head 8 is provided above the working platform 2 of the present embodiment, and the punch head 8 is connected to a lifting control device. The lifting control device adopts the structure in the prior art, which will not be described in detail here. When straightening is required, the straightening operation can be achieved by controlling the punch head 8 to punch the rod body downward through the lifting control device. A through groove 21 is provided on the working platform 2 at a position corresponding to the punch head 8. A positioning plate 3 is provided at one end of the two support seats 4 on the working platform 2, and the positioning plate 3 is used to limit the end position of the valve stem body. When placing, the valve stem body is placed in the groove 41 of the support seat 4, and the end of the valve is abutted against the positioning plate 3, so as to quickly confirm the valve placement position.

[0031] In order to prevent the roller body 53 from being subjected to greater pressure and having its life shortened when the punch head 8 punches downward, in this embodiment, the central axes of the two roller bodies 53 on the same support seat 4 are arranged on the same horizontal plane as the central axis of the valve stem, and are respectively arranged on both sides of the valve stem. With this structural design, the valve stem can be in rolling contact with the valve stem without being subjected to the punching force in the vertical direction.

[0032] The utility model provides a valve stem straightening device, in which a roller body 53 with adjustable position is arranged in a support seat 4. The roller body 53 is in rolling contact with the valve stem, which can reduce the friction coefficient when the valve stem rotates, reduce wear and friction resistance; at the same time, the position of the roller body 53 is adjustable, so that when the outer diameter of the roller body 53 is reduced due to long-term wear and tear and thus cannot be in rolling contact with the valve stem, the position of the roller body 53 can be adjusted to make it in rolling contact with the valve stem again, thereby ensuring the accuracy and stability of the valve stem placement, effectively reducing the use cost and extending the service life; in addition, the measuring component 7 is designed to be a structure that is easy to disassemble and assemble and has an adjustable detection position, which is not only convenient for maintenance and replacement, but also can flexibly adjust the detection position to ensure high accuracy of the detection result.

[0033] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. A valve stem straightening device, characterized in that: The invention comprises a device body (1), wherein a working platform (2) is provided on the device body (1), wherein a support seat (4) for placing a valve and a measuring assembly (7) for measuring the curvature of a valve stem are provided on the working platform (2), wherein the measuring assembly (7) is located on one side of the support seat (4), wherein the measuring assembly (7) comprises a detachable instrument (71) whose detection position can be adjusted, wherein a groove (41) for placing a valve stem is provided on the support seat (4), wherein a roller assembly (5) with adjustable position is provided in the groove (41), wherein the roller assembly (5) comprises a roller body (53), wherein the outer surface of the roller body (53) is in rolling contact with the outer surface of the valve stem.

2. A valve stem straightening device according to claim 1, characterized in that: The roller assembly (5) further comprises a connecting shaft (52), the two ends of the roller body (53) being rotatably mounted on the connecting shaft (52), the two ends of the connecting shaft (52) being respectively fixedly connected with a sliding block (51), the sliding block (51) being connected to an adjusting assembly (6), and the adjusting assembly (6) being used for adjusting the position of the sliding block (51) in the horizontal direction.

3. A valve stem straightening device according to claim 2, characterized in that: The adjusting assembly (6) comprises an adjusting bolt (61) and an adjusting nut (62); the adjusting bolt (61) is relatively fixed in the axial direction and rotatably mounted on the support seat (4); the axis of the adjusting bolt (61) is arranged in a horizontal direction perpendicular to the axis of the valve stem; the sliding block (51) is slidably sleeved on the outside of the adjusting bolt (61); and the adjusting nuts (62) are threadedly sleeved on both sides of the sliding block (51); and the two adjusting nuts (62) are respectively in contact with the sliding block (51).

4. A valve stem straightening device according to claim 3, characterized in that: The support seat (4) is provided with a receiving groove (45) for receiving the roller assembly (5); the side wall of the groove (41) is provided with an opening groove (44) connected to the receiving groove (45); the roller body (53) is located in the receiving groove (45), and a portion of the roller body (53) is located outside the opening groove (44) and in rolling contact with the outer surface of the valve stem.

5. A valve stem straightening device according to claim 4, characterized in that: A clearance groove (43) is processed at a position corresponding to the sliding block (51) on the support seat (4), the clearance groove (43) is connected to the receiving groove (45), the clearance groove (43) is extended in the horizontal direction, and the length of the clearance groove (43) is greater than the stroke length of the sliding block (51) in the horizontal direction, and one end of the sliding block (51) extends to the outside through the clearance groove (43) and is connected to the adjusting bolt (61).

6. A valve stem straightening device according to claim 1, characterized in that: The measuring assembly (7) further comprises a mounting rod (72) and a connecting piece (73); the mounting rod (72) is fixedly connected to the instrument (71); a fixing seat (22) is provided on the working platform (2); one end of the connecting piece (73) is connected to the mounting rod (72), and the other end is connected to the fixing seat (22) via a fastener (74); after the instrument (71) is installed, the axis of its detection head is perpendicular to the axis of the valve stem, and the detection head is in contact with the valve stem.

7. A valve stem straightening device according to claim 1 or 6, characterized in that: The working platform (2) is also provided with a limit block (9) for limiting the installation position of the instrument (71).

8. The valve stem straightening device according to claim 1, characterized in that: A jacking-type punching head (8) is arranged above the working platform (2), and the punching head (8) is connected to a lifting control device.

Images