Head trimming device for valve rod blank formed by hot forging

Abstract

The utility model discloses a hot forging formed valve rod blank head trimming device which comprises a trimming die which is installed on a working table of a punching machine in a matched mode through a detachable lower connecting base. The upper punching body is mounted on a punch of the punching machine in a matched manner through a detachable upper connecting seat; wherein a center hole is formed in the trimming die, and the shape of the inner wall of the center hole is matched with the size of the head of a valve rod blank.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stem production equipment, and particularly relates to a trimming device for the head of a valve stem blank formed by hot forging. Background Art

[0002] According to the complex shape of the valve stem, the cutting process is usually selected. The cutting process is suitable for various parts with complex shapes. The specific processing flow is: sawing → heat treatment → turning → milling → local heat treatment → surface finishing → non-destructive testing → finished product. Due to the continuous increase in the demand for valve stems, the cutting processing method can no longer meet the demand. Then, experimental development is carried out to adopt the hot forging forming method for production. After hot forging forming, it is very difficult to remove the flash, burrs, etc. generated at the head of the valve stem blank. If turning or milling is used again to remove the flash and burrs, the production cost is high and the cycle is long. How to remove the flash at the head of the blank after hot forging forming of the valve stem has become a major problem. Content of the Utility Model

[0003] In view of the above technical problems, the utility model provides a trimming device for the head of a valve stem blank formed by hot forging.

[0004] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A trimming device for the head of a valve stem blank formed by hot forging, comprising:

[0006] A trimming die, which is installed on the workbench surface of a punching press through a detachable lower connecting seat.

[0007] An upper punch body, which is installed on the punch head of a punching press through a detachable upper connecting seat.

[0008] Among them, a central hole is provided on the trimming die, and the inner wall shape of the central hole is adapted to the size of the head of the valve stem blank.

[0009] The lower connecting seat includes:

[0010] A die sleeve, which is sleeved outside the trimming die.

[0011] A lower pressure cover, which is sleeved on the outer wall of the die sleeve and is fixedly installed on the workbench surface through a lower bolt.

[0012] Among them, the inner wall of the die sleeve is in the shape of a conical frustum, and the outer wall of the trimming die is in the shape of a conical frustum that can be mutually adapted to the inner wall of the die sleeve. A cylindrical boss is provided at the top of the die sleeve, and the inner wall shape of the lower pressure cover can be mutually adapted to the outer wall of the die sleeve and the boss, so that the lower pressure cover can limit the die sleeve.

[0013] The upper connecting seat includes:

[0014] An upper punch sleeve, which is sleeved outside the upper punch body.

[0015] The upper gland is sleeved on the outer wall of the upper punch sleeve and is fixedly installed on the punch through the upper bolt;

[0016] Among them, the inner wall of the upper punch sleeve is in a boss shape, and the outer wall of the upper punch body is in a boss shape that can be mutually adapted to the inner wall of the upper punch sleeve; the outer wall of the upper punch sleeve is in a boss shape, and the diameter-reduced part can be mutually clamped with the central hole of the upper gland, so that the upper gland can limit the position of the upper punch sleeve.

[0017] A limit ring is arranged on the punch of the upper punch body, and the diameter of the limit ring is larger than the diameter of the central hole of the trimming die, so that when the punch of the upper punch body presses down on the head of the valve stem blank, the rod body of the valve stem blank will not be extruded and deformed.

[0018] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple, the clamping is convenient, the manufacturing cost is low, and it is applicable to the trimming process of the head of the valve stem blank after hot forging. While ensuring the processing quality, the production efficiency is effectively improved. The present utility model utilizes the opening and closing movement of the punching press. When the punching press closes, the upper part device drives the trimming upper punch body to move downwards. The lower bottom surface of the upper punch body contacts the upper bottom surface of the valve stem blank head, and the valve stem blank head is stressed. The entire head moves downwards through the trimming die to complete the head trimming process. When the punching press opens, the upper part device drives the trimming upper punch body to move upwards, and the pushing process of the valve stem blank head is completed through the mechanism of the punching press itself. Brief Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the present utility model.

[0020] Figure 2 It is a sectional view of the trimming die.

[0021] Figure 3 It is a three-dimensional view of the trimming die.

[0022] Figure 4 It is a sectional view of the die sleeve.

[0023] Figure 5 It is a three-dimensional view of the die sleeve.

[0024] Figure 6 It is a sectional view of the upper gland.

[0025] Figure 7 It is a three-dimensional view of the upper gland.

[0026] Figure 8 It is a three-dimensional view of the upper punch body.

[0027] Figure 9 It is a three-dimensional view of the upper punch sleeve.

[0028] Figure 10 It is a sectional view of the upper punch sleeve. Detailed implementation mode

[0029] To make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below in combination with the specific implementation mode and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary and not intended to limit the scope of the present utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessarily confusing the concept of the present utility model.

[0030] As Figure 1 and Figure 3 shown, a trimming device for the head of a hot-forged valve stem blank includes: a trimming die 1, which is cooperatively installed on the workbench surface of a punching press through a detachable lower connecting seat; an upper punch body 4, which is cooperatively installed on the punch head of the punching press through a detachable upper connecting seat; wherein, a central hole is provided on the trimming die 1, and the inner wall shape of the central hole is adapted to the head size of the valve stem blank 8. There is no chamfer and smooth transition inside the trimming die 1, and it has a certain trimming edge.

[0031] As Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, the lower connecting seat includes: a die sleeve 2, which is sleeved outside the trimming die 1; a lower pressing cover 3, which is sleeved on the outer wall of the die sleeve 2 and is fixedly installed on the workbench surface through a lower bolt 7; wherein, the inner wall of the die sleeve 2 is in the shape of a conical frustum, and the outer wall of the trimming die 1 is in the shape of a conical frustum that can be mutually adapted to the inner wall of the die sleeve 2; a cylindrical boss is provided at the top of the die sleeve 2, and the inner wall shape of the lower pressing cover 3 can be mutually adapted to the outer wall of the die sleeve 2 and the boss, so that the lower pressing cover 3 can limit the die sleeve 2.

[0032] As Figure 1 and Figures 6 to 10 shown, the upper connecting seat includes: an upper punch sleeve 5, which is sleeved outside the upper punch body 4; an upper pressing cover 6, which is sleeved on the outer wall of the upper punch sleeve 5 and is fixedly installed on the punch head through an upper bolt 9; wherein, the inner wall of the upper punch sleeve 5 is in the shape of a boss, and the outer wall of the upper punch body 4 is in the shape of a boss that can be mutually adapted to the inner wall of the upper punch sleeve 5; the outer wall of the upper punch sleeve 5 is in the shape of a boss, and the diameter-reduced part can be mutually clamped with the central hole of the upper pressing cover 6, so that the upper pressing cover 6 can limit the upper punch sleeve 5. Among them, the shape of the upper pressing cover 6 is the same as that of the lower pressing cover 3.

[0033] As Figure 8 shown, a limiting ring 10 is provided on the punch head of the upper punch body 4, and the diameter of the limiting ring 10 is greater than the diameter of the central hole of the trimming die 1, so that when the punch head of the upper punch body 4 presses down the head of the valve stem blank 8, the rod body of the valve stem blank 8 will not be extruded and deformed.

[0034] When the utility model is in use, the rod body of the valve stem blank 8 is inserted into the central hole of the trimming die 1. At this time, the head is located above the central hole. Start the punching machine. The punching machine performs opening and closing movements within the effective stroke. When the punching machine closes, the upper part of the device drives the trimming upper punch 4 to move downward. The lower bottom surface of the upper punch 4 contacts the upper bottom surface of the head of the valve stem blank 8. The head of the valve stem blank 8 is stressed, and the entire head moves downward through the trimming die 1 to complete the head trimming process. When the punching machine opens, the upper part of the device drives the trimming upper punch 4 to move upward, and the pushing process of the head of the valve stem blank 8 is completed through the mechanism of the punching machine itself.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A trimming device for the head of a valve stem blank formed by hot forging, characterized in that, Including: A trimming die (1), which is cooperatively mounted on the workbench surface of a punching press through a detachable lower connecting seat; An upper punch body (4), which is cooperatively mounted on the punch head of a punching press through a detachable upper connecting seat; Wherein, a central hole is provided on the trimming die (1), and the inner wall shape of the central hole is adapted to the head size of the valve stem blank (8).

2. The trimming device for the head of the valve stem blank formed by hot forging according to claim 1, characterized in that, The said lower connecting seat includes: A die sleeve (2), which is sleeved outside the trimming die (1); A lower pressing cover (3), which is sleeved on the outer wall of the die sleeve (2) and is fixedly mounted on the workbench surface through a lower bolt (7); Wherein, the inner wall of the die sleeve (2) is in the shape of a truncated cone, and the outer wall of the trimming die (1) is in the shape of a truncated cone that can be mutually adapted to the inner wall of the die sleeve (2); a cylindrical boss is provided at the top of the die sleeve (2), and the inner wall shape of the lower pressing cover (3) can be mutually adapted to the outer wall of the die sleeve (2) and the boss, so that the lower pressing cover (3) can limit the die sleeve (2).

3. A trimming device for the head of a valve stem blank formed by hot forging according to claim 1, characterized in that, The said upper connecting seat includes: An upper punch sleeve (5), which is sleeved outside the upper punch body (4); An upper pressing cover (6), which is sleeved on the outer wall of the upper punch sleeve (5) and is fixedly mounted on the punch head through an upper bolt (9); Wherein, the inner wall of the upper punch sleeve (5) is in the shape of a boss, and the outer wall of the upper punch body (4) is in the shape of a boss that can be mutually adapted to the inner wall of the upper punch sleeve (5); the outer wall of the upper punch sleeve (5) is in the shape of a boss, and the diameter-reduced part can be mutually clamped with the central hole of the upper pressing cover (6), so that the upper pressing cover (6) can limit the upper punch sleeve (5).

4. A trimming device for the head of a valve stem blank formed by hot forging according to claim 1 or 3, characterized in that, A limiting ring (10) is provided on the punch head of the said upper punch body (4), and the diameter of the limiting ring (10) is larger than the diameter of the central hole of the trimming die (1), so that when the punch head of the upper punch body (4) presses down on the head of the valve stem blank (8), the rod body of the valve stem blank (8) will not be extruded and deformed.

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