Spring heat treatment clamp

Abstract

The utility model relates to a spring heat treatment clamp. The clamp comprises a clamp body, a columnar accommodating cavity; a lower stopper; a positioning column; a cover plate; and an upper limiting part. According to the use mode, the springs are sequentially filled into the columnar containing cavities through manual work or automatic equipment, the bottoms of the springs abut against the lower limiting parts, the positioning columns extend into the springs from the bottoms of the springs, then the cover plate and the clamp body are covered, and at the moment, the upper limiting parts abut against the springs in a one-to-one correspondence mode; the springs can be kept axially straight under the action of the positioning columns, and then under the action of the upper limiting parts and the lower limiting parts, the length of each spring is restrained to be the same length. A plurality of springs can be shaped and fixed at a time, and the positioning mode is relatively simple.

Description

Technical Field

[0001] The utility model relates to a spring clamp, in particular to a spring heat treatment clamp. Background Art

[0002] The spring production process requires not only machining processes such as coiling and cutting, but also multiple heat treatment processes for the material itself. Generally, after coiling, the spring undergoes recrystallization annealing, quenching, and tempering. Tempering after quenching can be performed twice: first, a correction tempering process. The correction tempering temperature should generally be approximately 20°C lower than the final tempering temperature. The temperature should be held for 10-15 minutes, followed by air cooling. Then, a final tempering process is performed. After the spring dimensions are corrected, the spring is mounted on a tempering fixture for final tempering. The tempering fixture should ensure that the spring's pitch and free length meet the requirements. The tempering temperature is 420°C ± 10°C, held for 30-35 minutes, and then cooled in water.

[0003] In order to improve the installation efficiency of springs and tempering setting fixtures during tempering, it is necessary to develop a heat treatment setting fixture that can efficiently set the springs. Summary of the Invention

[0004] The utility model provides a spring heat treatment fixture, which solves the problem of insufficient installation efficiency and shaping efficiency of the spring heat treatment fixture in the prior art.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions: A spring heat treatment fixture comprises a fixture body;

[0006] Columnar accommodating cavities, distributed in an array on the clamp body, for accommodating springs;

[0007] A lower limiting portion is located at the bottom of the columnar accommodating cavity and can limit the bottom of the spring;

[0008] a positioning post, fixed on the lower limiting portion and located at the center of the columnar accommodating cavity;

[0009] a cover plate, which can be combined with the clamp body to cover the upper opening of the columnar accommodating cavity;

[0010] An upper limit portion is provided on the cover plate and is directly opposite to the columnar accommodating cavity. The upper limit portion can limit the top of the spring.

[0011] The utility model is used as follows: the springs are sequentially loaded into the cylindrical accommodating cavity manually or automatically, the bottom of the spring abuts against the lower limit portion, the positioning post extends from the bottom of the spring into the interior of the spring, and then the cover plate is closed with the clamp body. At this time, the upper limit portion and the spring are abutted one by one. The spring can be kept axially straight under the action of the positioning post. Then, under the action of the upper limit portion and the lower limit portion, the length of each spring is constrained to a uniform length. The utility model can shape and fix multiple springs at a time, and the positioning method is relatively simple.

[0012] Furthermore, the clamp body includes two spaced-apart positioning plates, a plurality of positioning tubes and a base plate. The positioning plates are provided with a plurality of positioning holes distributed in an array. The positioning tubes are fixedly passed through the corresponding positioning holes of the two positioning plates at the same time. The base plate is fixedly attached to the lower end of the positioning tubes. The inner cavity of the positioning tubes constitutes the columnar accommodating cavity, and the portion of the base plate in contact with the positioning tubes constitutes the lower limit portion.

[0013] Furthermore, the invention further comprises at least four sets of positioning and locking assemblies, each comprising a positioning rod, a first sleeve, a first nut, a second sleeve, and a second nut. The positioning rod is divided into an upper section, a middle section, and a lower section, the shaft diameter of the middle section being larger than the shaft diameters of the upper and lower sections. The two positioning pieces are respectively sleeved on the upper and lower sections. The first sleeve is sleeved on the upper section and abuts against the positioning piece. The second sleeve is sleeved on the lower section and abuts against the positioning piece. The base plate is sleeved on the lower section. The second nut is screwed onto the lower section and abuts against the second sleeve. The cover plate can be sleeved on the upper section. The first nut can be screwed onto the upper section and abuts against the cover plate against the first sleeve. The spring setting length of the invention can be adjusted by changing the length of the first sleeve.

[0014] Therefore, compared with the prior art, the present invention has the following characteristics: 1. A plurality of columnar accommodating cavities distributed in an array are provided on the clamp body, and the spring can remain axially straight under the action of the positioning column, and then under the action of the upper limit part and the lower limit part, the length of each spring is constrained to a uniform length. Therefore, the present invention can shape and fix multiple springs at a time, and the positioning method is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attachment Figure 1 It is a structural schematic diagram of the utility model;

[0016] Attachment Figure 2 It is attached Figure 1 A magnified view of part A;

[0017] Attachment Figure 3 It is a structural diagram of the cover;

[0018] Attachment Figure 4 It is a structural diagram of the positioning locking assembly and the fixture body;

[0019] Attachment Figure 5 It is a cross-sectional view of the present utility model. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be further specifically described below with reference to embodiments and in conjunction with the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] Example 1: See Figure 1 、 Figure 3 and Figure 5 , a spring heat treatment fixture, comprising a fixture body 100;

[0023] Columnar accommodating cavities 200 are distributed in an array on the fixture body and are used to accommodate springs;

[0024] The lower limiting portion 300 is located at the bottom of the cylindrical accommodating cavity and can limit the bottom of the spring;

[0025] The positioning column 400 is fixed on the lower limiting portion and located at the center of the columnar accommodating cavity;

[0026] The cover plate 500 can be combined with the fixture body to cover the upper opening of the columnar accommodating cavity;

[0027] The upper limit portion 600 is provided on the cover plate and is aligned with the columnar accommodating cavity one by one. The upper limit portion can limit the top of the spring.

[0028] This embodiment is used as follows: Springs are sequentially loaded into the cylindrical accommodating cavity manually or automatically, with the bottom of the spring abutting against the lower limiter. The positioning post extends from the bottom of the spring into the interior of the spring. The cover plate is then closed over the fixture body, with the upper limiter abutting against the springs one-to-one. The springs are then held axially straight by the positioning post. The upper and lower limiters then constrain the length of each spring to a uniform length. This embodiment can shape and secure multiple springs at once, and the positioning method is relatively simple.

[0029] See Figure 2 and Figure 5 The fixture body includes two spaced-apart positioning pieces 110, several square positioning tubes 120 and a bottom plate 130. The positioning tubes are provided with several openings 121 to facilitate heat exchange. The positioning pieces are provided with several array-distributed positioning holes 111. The positioning tubes are fixedly inserted into the corresponding positioning holes of the two positioning pieces at the same time. The bottom plate is fixedly attached to the lower end of the positioning tubes. The inner cavity of the positioning tubes constitutes a columnar accommodating cavity, and the part of the bottom plate that contacts the positioning tubes constitutes the lower limit portion.

[0030] See Figure 4 This embodiment also includes four sets of positioning and locking assemblies 700, which include a positioning rod 710, a first sleeve 720, a first nut 730, a second sleeve 740, and a second nut 750. The positioning rod is divided into an upper segment 711, a middle segment 712, and a lower segment 713. The axial diameter of the middle segment is larger than that of the upper and lower segments. Two positioning pieces are respectively mounted on the upper and lower segments. The first sleeve is mounted on the upper segment and abuts the positioning piece. The second sleeve is mounted on the lower segment and abuts the positioning piece. The bottom plate is mounted on the lower segment. The second nut is screwed onto the lower segment and abuts the bottom plate against the second sleeve. The cover plate can be mounted on the upper segment. The first nut can be screwed onto the upper segment and abuts the cover plate against the first sleeve. The spring setting length of this embodiment can be adjusted by changing the length of the first sleeve.

[0031] See Figure 2 The positioning column includes three positioning pieces 410 distributed in a circular array, and the top of the positioning piece is provided with a cut corner.

[0032] See Figure 3 The shape of the upper limit portion is adapted to the contour of the columnar accommodating cavity, and an avoidance groove 610 adapted to the shape of the positioning column is provided on the upper limit portion. When the cover plate is covered with the clamp body, the upper limit portion is arranged to extend into the columnar accommodating cavity, and the upper end of the positioning column is arranged to extend into the avoidance groove.

[0033] It is obvious to those skilled in the art that the present invention can be modified in many ways, and such modifications are not considered to depart from the scope of the present invention. All such modifications obvious to those skilled in the art are intended to be included within the scope of the present claims.

Claims

1. A spring heat treatment fixture, characterized by: including a fixture body; Columnar accommodating cavities, distributed in an array on the clamp body, for accommodating springs; A lower limiting portion is located at the bottom of the columnar accommodating cavity and can limit the bottom of the spring; a positioning post, fixed on the lower limiting portion and located at the center of the columnar accommodating cavity; a cover plate, which can be combined with the clamp body to cover the upper opening of the columnar accommodating cavity; An upper limit portion is provided on the cover plate and is directly opposite to the columnar accommodating cavity. The upper limit portion can limit the top of the spring.

2. The spring heat treatment fixture according to claim 1, characterized in that: The clamp body includes two spaced-apart positioning plates, a plurality of positioning tubes and a base plate. The positioning plates are provided with a plurality of positioning holes distributed in an array. The positioning tubes are fixedly inserted into the corresponding positioning holes of the two positioning plates at the same time. The base plate is fixedly attached to the lower end of the positioning tubes. The inner cavity of the positioning tubes constitutes the columnar accommodating cavity, and the portion of the base plate in contact with the positioning tubes constitutes the lower limit portion.

3. The spring heat treatment fixture according to claim 2, characterized in that: The cam is secured to a location where the bolt is held in place and the bolt has a check valve in its valve case to allow the bolt to flow in. The cam is secured to a location where the bolt is held in place and the bolt has a check valve in its valve case to allow the bolt to flow in. The cam is secured to a location where the bolt is held in place and the bolt has a check valve in its valve case to allow the bolt to flow in.

4. The spring heat treatment fixture according to claim 1, characterized in that: The positioning column includes three positioning pieces distributed in a circumferential array, and the tops of the positioning pieces are provided with cut corners.

5. The spring heat treatment fixture according to claim 4, characterized in that: The outer shape of the upper limit portion is adapted to the contour of the columnar accommodating cavity, and the upper limit portion is provided with an avoidance groove adapted to the outer shape of the positioning column. When the cover plate is covered with the clamp body, the upper limit portion is arranged to extend into the columnar accommodating cavity, and the upper end of the positioning column is arranged to extend into the avoidance groove.

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