Spring pitch correction device and method

Abstract

The invention provides a spring pitch correction device and method.The spring pitch correction device comprises a pincer-shaped body formed by hinging a left supporting arm and a right supporting arm in the middle in a crossed mode through a rotating shaft, a positioning block is fixedly connected to the top end of the pincer head portion of the left supporting arm, a positioning face facing the pincer head portion of the right supporting arm is formed on the positioning block, and a cutter pressing block is fixedly connected to the top end of the pincer head portion of the right supporting arm; a tool bit part with a tool nose facing the positioning surface of the positioning block is formed on the tool pressing block; the clamp handle part on one side is further provided with a limiting bolt which is in threaded connection with the clamp handle part in a penetrating mode, the top end of the limiting bolt can abut against the clamp handle part on the other side when the two clamp handle parts are closed, and therefore the maximum value of the pitch supported by the upper tool bit face and the lower tool bit face of the tool bit is limited, and correction consistency is guaranteed. The spring clamping device is ingenious in design thought, simple in structure, quite convenient and rapid to manufacture and use and low in manufacturing cost, the spring machining rejection rate is reduced, and the labor intensity is lowered.

Description

Technical Field

[0001] The invention belongs to the technical field of spring correction equipment, and in particular relates to a spring pitch correction device and method. Background Art

[0002] In aviation products, due to the high precision requirements for springs, whether they are wound on a lathe or automatically wound using a computer spring compression machine, the precision requirements of the springs cannot be fully met. In order to improve the dimensional accuracy of the springs, the springs need to be corrected more frequently. During the correction process, the spring pitch will continue to change, making the pitch of each coil of the spring uneven, causing the spring to be scrapped due to failure to meet the precision requirements. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a device and method for correcting and adjusting the pitch size of the spring in order to improve the uniformity of the pitch of each coil of the spring. The specific scheme is as follows:

[0004] A spring pitch correction device comprises a clamp-type main body composed of left and right arms cross-hinged in the middle by a rotating shaft, a positioning block is fixedly connected to the top of the clamp head of the left arm, the positioning block is formed with a positioning surface facing the clamp head of the right arm, and a pressure knife block is fixedly connected to the top of the clamp head of the right arm, the pressure knife block is formed with a knife head with the knife tip facing the positioning surface of the positioning block.

[0005] Furthermore, the extending direction of the blade tip of the blade pressing block is parallel to the axial centerline direction of the rotating shaft.

[0006] Furthermore, the positioning surface of the positioning block is a flat surface parallel to the axis direction of the rotating shaft.

[0007] Furthermore, the positioning surface of the positioning block is generally a straight surface parallel to the axis of the rotating shaft, and a concave depression with a certain curvature is formed in the middle thereof.

[0008] Furthermore, a return spring is sandwiched between the two clamp handles.

[0009] Furthermore, one side of the clamp handle is also provided with a limit bolt threaded through it, and the top end of the limit bolt can abut against the other side of the clamp handle when the two clamp handles are closed, thereby limiting the maximum value of the pitch supported by the upper and lower blade heads of the blade.

[0010] Furthermore, a locking nut is threadedly connected to the limiting bolt to lock the limiting position of the limiting bolt.

[0011] The spring pitch correction method of the present invention adopts the spring pitch correction device as described above.

[0012] Further, including:

[0013] After the spring is formed, use a detection tool to detect the spring pitch. When the spring pitch is uneven, hold the upper end of the spring with one hand and press one side of the spring against the positioning surface of the positioning block. The spring section to be corrected is facing the pressure cutter block, and the overall axis of the spring product is perpendicular to the extension direction of the knife tip. Manually press the two pliers handles together to press the knife tip of the pressure cutter block into the spring section to be corrected. As the knife head extends, the pitch is expanded by the upper and lower knife head surfaces until it is consistent with the pitch of other spring sections, thereby achieving the purpose of correcting the spring pitch.

[0014] The invention has an ingenious design concept, a simple structure, is very convenient and quick to manufacture and use, has a low manufacturing cost, reduces the spring processing scrap rate, and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings that constitute a part of the present invention are used to provide further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the working state of calibrating the pitch of a spring product according to the present invention.

[0018] The reference numerals in the figure are: left support arm 1; right support arm 2; rotating shaft 3; limiting bolt 4, locking nut 5; reset spring 6; spring product 7; pliers head 11; pliers handle 12; positioning block 13; positioning surface 131; pliers head 21; pliers handle 22; knife pressing block 23; knife head surface 231. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0020] In the description of the embodiments of the present invention, it should be noted that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the application product is usually placed when in use, or is the orientation or position relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention or simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] The term "plurality" in the present invention refers to more than two (including two). The terms "first", "second", etc. are only used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0022] Unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0024] As shown in the figure, the present invention includes a pliers-type body composed of a left support arm 1 and a right support arm 2, which are cross-hinged in the middle through a rotating shaft 3. The support arm part above the rotating shaft 3 is a pliers head (11, 21), and the support arm part below the rotating shaft 3 is a pliers handle (12, 22). A positioning block 13 is fixedly connected to the top of the pliers head 11 of the left support arm 1, and the positioning block 13 is formed with a positioning surface 131 facing the pliers head 22 of the right support arm 2. A knife pressing block 23 is fixedly connected to the top of the pliers head 22 of the right support arm 2, and the knife pressing block 23 is formed with a knife head with the knife tip facing the positioning surface 131 of the positioning block 13.

[0025] Preferably, the extending direction of the blade tip of the blade pressing block 23 is parallel to the axial centerline direction of the rotating shaft 3 .

[0026] Preferably, the positioning surface 131 of the positioning block 13 is a straight surface parallel to the axis direction of the rotating shaft 3 .

[0027] Alternatively, the positioning surface 131 of the positioning block 13 is a flat surface parallel to the axial direction of the rotating shaft 3 as a whole, and a concave depression with a certain curvature is formed in the middle thereof. The function of the depression is to increase the contact area with the side of the spring product, so that the positioning of the spring product is more stable, and the radial displacement of the spring product during the correction process is effectively avoided, and the spring product can be positioned faster when it is rotated and raised and lowered axially.

[0028] Furthermore, a reset spring 6 is sandwiched between the clamp handles (12, 22) of the left and right arms below the rotating shaft so as to open and reset as soon as possible after finishing the calibration at one place so as to prepare for the calibration at the next place, thereby improving work efficiency and reducing work intensity.

[0029] Furthermore, the clamp handle on one side is also provided with a limit bolt 4 that is threaded and passed through. The top end of the limit bolt 4 can abut against the clamp handle on the other side when the two clamp handles are closed, thereby limiting the minimum distance between the tip of the pressure knife block 23 and the positioning surface 131 of the positioning block 13, thereby determining the maximum depth of the cutter head extending into the internode of the spring product, and the spacing between the upper and lower cutter head surfaces 231 of the cutter head gradually increases from the tip of the cutter head, thereby limiting the maximum value of the pitch supported by the two cutter head surfaces 231, thereby ensuring the consistency and uniformity of the pitch correction for the same spring product.

[0030] And by adjusting the limit bolt 4, the minimum distance can be adjusted to adapt to the pitch adjustment of spring products with different standard pitches.

[0031] Furthermore, a locking nut 5 is threadedly connected to the limiting bolt 4 so as to lock the limiting position of the limiting bolt 4 and prevent the limiting bolt from moving during operation.

[0032] The method for using this device to correct the spring pitch is:

[0033] After the spring is formed, use the inspection tool to check the spring pitch. If the spring pitch is uneven, refer to Figure 2 As shown, one hand holds the upper end of the spring and presses one side of the spring against the positioning surface 131 of the positioning block 13, and the spring section to be corrected is directed toward the pressure knife block 23, and the overall axis of the spring product 7 is perpendicular to the extension direction of the knife tip. The two pliers handles are manually pressed together to press the knife tip of the pressure knife block 23 into the spring section to be corrected. As the knife head extends, the pitch is expanded by the upper and lower knife head surfaces 231 until it is consistent with the pitch of other spring sections, thereby achieving the purpose of correcting the spring pitch.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spring pitch correction device, characterized in that: The utility model comprises a pliers-type main body which is composed of left and right supporting arms and is cross-hinged in the middle by a rotating shaft. A positioning block is fixedly connected to the top of the pliers head of the left supporting arm, and the positioning block is formed with a positioning surface facing the pliers head of the right supporting arm. A knife pressing block is fixedly connected to the top of the pliers head of the right supporting arm, and the knife pressing block is formed with a knife head with a knife tip facing the positioning surface of the positioning block.

2. The spring pitch correction device according to claim 1, characterized in that: The extending direction of the knife tip of the knife pressing block is parallel to the axial center line direction of the rotating shaft.

3. The spring pitch correction device according to claim 1, characterized in that: The positioning surface of the positioning block is a flat surface parallel to the axis direction of the rotating shaft.

4. The spring pitch correction device according to claim 1, characterized in that: The positioning surface of the positioning block is generally a flat surface parallel to the axis of the rotating shaft, and a concave depression with a certain curvature is formed in the middle thereof.

5. The spring pitch correction device according to claim 1, characterized in that: A return spring is also sandwiched between the two clamp handles.

6. The spring pitch correction device according to claim 1, characterized in that: One side of the clamp handle is also provided with a limit bolt threaded through it, and the top end of the limit bolt can abut against the other side of the clamp handle when the two clamp handles are closed, thereby limiting the maximum value of the pitch supported by the upper and lower blade heads of the blade.

7. The spring pitch correction device according to claim 1, characterized in that: A locking nut for locking the limiting position of the limiting bolt is also threadedly connected to the limiting bolt.

8. A spring pitch correction method, characterized in that: A spring pitch correction device as claimed in claim 1 is used.

9. The spring pitch correction method according to claim 8, characterized in that: include: After the spring is formed, use a detection tool to detect the spring pitch. When the spring pitch is uneven, hold the upper end of the spring with one hand and press one side of the spring against the positioning surface of the positioning block. The spring section to be corrected is facing the pressure cutter block, and the overall axis of the spring product is perpendicular to the extension direction of the knife tip. Manually press the two pliers handles together to press the knife tip of the pressure cutter block into the spring section to be corrected. As the knife head extends, the pitch is expanded by the upper and lower knife head surfaces until it is consistent with the pitch of other spring sections, thereby achieving the purpose of correcting the spring pitch.

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