Spring fixing device of automatic spring grinding machine

Abstract

The application provides a spring fixing device of an automatic spring grinding machine, which comprises a grinding disc, a supporting sleeve and an adjusting sleeve. The grinding disc is a disc structure and is provided with a hole at the center for connecting with the grinding machine. The grinding disc is provided with spring fixing holes which are uniformly distributed along the circumference. The spring fixing holes are through holes and are provided with three thread holes which are uniformly distributed along the circumference on the upper and lower end faces of each spring fixing hole. The supporting sleeve is a circular ring structure and is provided with three thread holes which are uniformly distributed along the circumference on the upper and lower end faces of the supporting sleeve. The adjusting sleeve is a circular ring with internal threads. The internal threads of the adjusting sleeve are composed of two threads with opposite rotation directions. The upper and lower end faces of each spring fixing hole of the grinding disc are connected with adjusting sleeve assemblies and the supporting sleeve. The application has the advantages of strong universality, reduced volume and quantity of the parts of the grinding machine, convenient storage, reduced production cost and shortened production cycle. The grinding disc does not need to be replaced but only needs to be matched with adjusting devices, thereby improving the production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of spring grinding technology, and specifically relates to a spring fixing device for an automatic spring grinding machine. Background Technology

[0002] Spring grinding is a necessary operation in spring manufacturing. A grinding disc is needed to hold the spring for grinding. Generally, a special grinding disc is used on a spring grinding machine. The thickness of the grinding disc is selected according to the length of the spring being processed. Multiple spring receiving holes are opened on the surface of the grinding disc to accommodate the spring. After the spring is placed on the grinding disc of a certain thickness, the top of the spring is slightly higher than the top surface of the grinding disc. The grinding disc carries the spring and rotates until the end of the spring contacts the grinding wheel and relative friction occurs, thus performing spring grinding.

[0003] When processing springs of different lengths, current technology often requires the fabrication of a new grinding disc with a thickness adapted to the spring being processed, replacing the original disc. Furthermore, the longer the spring, the thicker the grinding disc needs to be, increasing the cost and making the disc too heavy, which is difficult to change and transport when switching between different models. Alternatively, two thin grinding discs can be used, with the spring fixed at both ends for grinding. Another solution involves adding a vertical spring-fixing sleeve to the grinding disc to secure the spring. Grinding different springs requires changing the grinding disc and fixing sleeve with different openings. For frequently processing multiple varieties of springs in small batches, processing and storing a large number of grinding discs and fixing sleeves inevitably increases costs, and the processing time is also required, potentially affecting the spring production cycle to some extent. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a spring fixing device for an automatic spring grinding machine, which solves the fixing problem when the automatic spring grinding machine is grinding springs of different sizes. In particular, it solves the problems of high production cost, long production cycle and difficulty in changing grinding discs of different sizes for the special fixing device required for the production process of multiple varieties and small batches of springs.

[0005] The technical solution adopted in this invention is: an automatic spring grinding machine spring fixing device, including a grinding disc, a support sleeve, and an adjusting sleeve. The grinding disc is a circular disc structure with a hole machined at its center for connection with the spring grinding machine. Spring fixing holes are evenly distributed along the circumference of the grinding disc, and the spring fixing holes are through the top and bottom. Three threaded holes are evenly distributed along the circumference on the upper and lower annular end faces of the spring fixing holes of the grinding disc. The support sleeve is an annular structure, with three threaded holes evenly distributed along the circumference on the upper and lower annular end faces of the support sleeve. The adjusting sleeve is an annular ring with internal threads, and the internal threads of the adjusting sleeve consist of two sections of threads with opposite directions. Each adjusting sleeve is threadedly connected to a left-hand bolt and a right-hand bolt to form a set of screw assemblies. Three sets of screw assemblies form a set of adjusting sleeve assemblies. One end of each set of adjusting sleeve assemblies is threadedly connected to the support sleeve, and the other end is threadedly connected to the grinding disc, so that adjusting sleeve assemblies and support sleeves are connected to the outer circumference of the upper and lower end faces of each spring fixing hole of the grinding disc.

[0006] Preferably, the outer wall of the adjusting sleeve does not exceed the inner range of the spring fixing hole to prevent reducing the inner diameter of the spring fixing hole from affecting the installation of the spring.

[0007] Preferably, the inner diameter of the support sleeve is the same as the inner diameter of the spring fixing hole.

[0008] Preferably, the device also includes a pad, the height of which is the same as the height of the support sleeve, the outer diameter of which is equal to the inner diameter of the support sleeve, and the inner diameter of which has various specifications. The side wall of the pad has at least two connecting holes evenly distributed around its circumference. The inner wall of the pad is machined into a bevel around the connecting holes so that the nail head can be recessed into the bevel to prevent the inner diameter of the pad from being reduced. The support sleeve has corresponding connecting holes machined at the corresponding positions, and the pad is fixed to the inner side of the support sleeve by screws passing through the connecting holes.

[0009] Preferably, the device also includes a pad, the height of which is the same as the height of the support sleeve. The pad is composed of multiple stacked annular bodies, i.e., the inner diameter of adjacent larger pads is the same as the outer diameter of smaller pads, and the outer diameter of the largest pad is equal to the inner diameter of the support sleeve. The sidewall of the pad has at least two connecting holes evenly distributed along its circumference. The inner wall of the pad is machined into a bevel around the connecting holes so that the nail head can be recessed into the bevel to prevent the inner diameter of the pad from being reduced. Corresponding connecting holes are machined at corresponding positions on the support sleeve. The pad is fixed to the inner side of the support sleeve by screws passing through the connecting holes. By stacking multiple pads, different inner diameters can be selected, further simplifying the device components.

[0010] Preferably, after the upper and lower ends of a set of adjusting sleeve components are connected to the support sleeve, the other end of the support sleeve is connected to another set of adjusting sleeve components, and then the other end of the adjusting sleeve components is connected to the grinding disc to increase the overall height.

[0011] Preferably, the vertical distance between the uppermost horizontal plane of the uppermost support sleeve and the lowermost horizontal plane of the lowermost support sleeve is less than the free height of the spring.

[0012] The beneficial effects of this invention are: 1. It satisfies the adaptability of spring grinding machines to springs of different sizes, thus improving versatility.

[0013] 2. Reduce the size and quantity of spring grinding machine parts, making them easier to store, lowering production costs, shortening the production cycle, and eliminating the need to replace the grinding disc, which only requires an adjustment device, thereby improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a top view of the spring fixing device of an automatic spring grinding machine.

[0015] Figure 2 This is a schematic diagram of the central cross-sectional structure of the spring fixing device of an automatic spring grinding machine.

[0016] Figure 3 A schematic diagram of the central cross-sectional structure of the spring fixing device of an automatic spring grinding machine after the pad is installed.

[0017] Figure 4 A schematic diagram of the central cross-sectional structure of the spring fixing device for an automatic spring grinding machine when it is raised for use.

[0018] Figure 5 This is a schematic diagram of the grinding disc structure.

[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the gasket.

[0020] Figure 7 This is a schematic diagram of the cross-sectional structure of the screw assembly.

[0021] Figure 8 This is a schematic diagram of the support sleeve structure.

[0022] Reference numerals: 1-Grinding disc, 2-Push pad, 3-Support sleeve, 4-Adjusting sleeve, 5-Right-hand bolt, 6-Left-hand bolt, 7-Screw, 101-Spring fixing hole, 201-Connecting hole, 301-Threaded hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] The principle of this invention is as follows: This invention uses a single grinding disc plus an adjustable sleeve. The grinding disc 1 uses a large opening design. The grinding disc 1 is adjusted to be close to half the free height of the spring by means of the rotating shaft sleeve. The adjusting sleeve assembly and the support sleeve 3 are installed at the upper and lower ends of the grinding disc 1 and adjusted so that the total length of the device is slightly lower than the free height of the spring to perform the spring grinding operation.

[0025] like Figure 1 and Figure 2 As shown in Embodiment 1, an automatic spring grinding machine spring fixing device includes a grinding disc 1, a support sleeve 3, and an adjusting sleeve 4, as described above. Figure 5 As shown, the grinding disc 1 is a circular structure with a hole machined at its center for connection with a spring grinding machine. Spring fixing holes 101 are evenly distributed along the circumference of the grinding disc 1, and these holes are continuous vertically. Three threaded holes are evenly distributed along the circumference on the upper and lower annular end faces of the spring fixing holes 101 on the grinding disc 1. Figure 8 As shown, the support sleeve 3 is a ring structure, and its inner diameter is the same as that of the spring fixing hole 101. Three threaded holes 301 are evenly distributed along the circumference of each of the upper and lower ring end faces of the support sleeve 3. The adjusting sleeve 4 is a ring with internal threads, which consist of two threads with opposite directions. The outer wall of the adjusting sleeve 4 does not exceed the inner diameter of the spring fixing hole 101 to prevent reducing the inner diameter of the spring fixing hole 101 from affecting the insertion of the spring. Figure 7 As shown, each adjusting sleeve 4 is threadedly connected to a left-hand bolt 6 and a right-hand bolt 5 to form a screw assembly. The left-hand bolt 6 and the right-hand bolt 5 can rotate relative to the adjusting sleeve 4 to adjust the height of the screw assembly. Three screw assemblies form a set of adjusting sleeve assemblies. One end of each adjusting sleeve assembly is threadedly connected to the support sleeve 3, and the other end is threadedly connected to the grinding disc 1, so that the upper and lower end faces of each spring fixing hole 101 of the grinding disc 1 are connected to adjusting sleeve assemblies and support sleeves 3. That is, the number of support sleeves 3 is equal to the number of adjusting sleeve assemblies, which is equal to twice the number of spring fixing holes 101.

[0026] First, adjust the center height of the grinding disc 1 to approximately half the free height of the spring. Then, connect and fix the support sleeve 3 to the grinding disc 1 using the left-hand bolt 6, the right-hand bolt 5, and the adjusting sleeve 4. Install an adjusting sleeve assembly and support sleeve 3 at the top and bottom of each spring fixing hole 101. Adjust the height and balance of the support sleeve 3 by adjusting the relative position of the connecting sleeve 4 with the left-hand bolt 6 and the right-hand bolt 5. Adjust the vertical distance from the uppermost horizontal plane of the uppermost support sleeve 3 to the lowermost horizontal plane of the lowermost support sleeve 3 to be slightly less than the free height of the spring. After installation and adjustment, insert the spring into the spring fixing hole 101 and fix it for grinding.

[0027] like Figure 3As shown in Example 2, if the outer diameter of the spring is significantly smaller than the inner diameter of the support sleeve 3 and they cannot be matched, a pad 2 needs to be installed inside the support sleeve 3. The other structures are the same as in Example 1. Figure 6 As shown, one type of pad 2 has the following structure: the height of pad 2 is the same as that of support sleeve 3, the outer diameter of pad 2 is equal to the inner diameter of support sleeve 3, the inner diameter of pad 2 has various specifications, three connecting holes 201 are evenly distributed along the circumference of the side wall of pad 2, and the inner wall of pad 2 is machined into a bevel around the connecting holes 201 so that the nail head can sink into the bevel and prevent the inner diameter of pad 2 from being reduced. Three connecting holes are machined at the corresponding positions of support sleeve 3, and the pad 2 is fixed to the inner side of support sleeve 3 by screws 7 passing through the connecting holes.

[0028] Another type of pad 2 has the following structure: the height of the pad 2 is the same as that of the support sleeve 3. The pad 2 is composed of multiple stacked annular bodies. The diameter of the pad 2 decreases layer by layer, that is, the inner diameter of the adjacent larger pad 2 is the same as the outer diameter of the smaller pad 2. The outer diameter of the largest pad 2 is equal to the inner diameter of the support sleeve 3. Three connecting holes 201 are evenly distributed along the circumference of the side wall of the pad 2. The connecting holes 201 of different specifications of pad 2 are in the same position so that the connecting holes can be connected when used together. The inner wall of the pad 2 is machined into a bevel around the connecting holes 201 so that the nail head can sink into the bevel and prevent the inner diameter of the pad 2 from being reduced. Three connecting holes are machined at the corresponding positions on the support sleeve 3. The pad 2 is fixed to the inner side of the support sleeve 3 by passing screws 7 through the connecting holes. By stacking multiple pads 2, different inner diameters can be selected, further simplifying the device accessories.

[0029] This embodiment is applied to cases where the spring diameter is small. First, the center height of the grinding disc 1 is adjusted to be close to half the free height of the spring. The left-hand bolt 6 and the right-hand bolt 5 are connected and fixed to the adjusting sleeve 4 on the grinding disc 1, so that an adjusting sleeve assembly and a support sleeve 3 are installed at the upper and lower ends of each spring fixing hole 101. The height and balance of the support sleeve 3 can be adjusted by the relative position of the connecting sleeve 4 with the left-hand bolt 6 and the right-hand bolt 5, so that the vertical distance from the uppermost horizontal plane of the uppermost support sleeve 3 to the lowermost horizontal plane of the lowermost support sleeve 3 is adjusted to be slightly less than the free height of the spring. Then, a pad 2 is placed inside the support sleeve 3. The inside of the connecting hole 201 of the pad 2 has an inclined surface, which can ensure that the head of the screw 7 or the through pin can sink into the inclined surface, preventing the inner diameter of the pad 2 from being reduced and affecting the spring installation. After the pad 2 is placed, the screw 7 or the through pin is passed out from the inside to the outside for fixing, ensuring that the pad 2 is tightly fixed to the support sleeve 3 without any shaking, and that the diameter of the spring is equal to or slightly smaller than the inner diameter of the pad 2. After installation and adjustment, the spring can be inserted into the spring fixing hole for fixing and then grinding can be performed.

[0030] like Figure 4As shown in Embodiment 3, if the free height of the spring is large and the length of the upper and lower pair of support sleeves 3 is insufficient to meet the free height of the spring, the total length of the device is increased by increasing the length of the intermediate structure, i.e., adjusting the number of sleeve assemblies and support sleeves 3. Other structures are the same as in Embodiment 1. After the upper and lower ends of a set of adjustment sleeve assemblies are connected to the support sleeves 3 respectively, the other end face of the support sleeves 3 is then connected to another set of adjustment sleeve assemblies. Then, the other end of the adjustment sleeve assembly is connected to the grinding disc 1 to increase the overall height.

[0031] This embodiment is applied when the spring's free height is large, and the height of a single-layer support sleeve 3 cannot meet the actual needs. First, the center height of the grinding disc 1 is adjusted to be close to half the spring's free height. The first-layer support sleeve 3 is then connected and fixed to the grinding disc 1 using left-hand bolts 6, right-hand bolts 5, and adjusting sleeves 4. Next, the next layer of support sleeve 3 is installed and connected and fixed to the other end of the first-layer support sleeve 3 using left-hand bolts 6, right-hand bolts 5, and adjusting sleeves 4. The vertical distance between the uppermost horizontal plane of the uppermost support sleeve 3 and the lowermost horizontal plane of the lowermost support sleeve 3 is adjusted to be slightly less than the spring's free height. After installation and adjustment, the spring can be inserted into the spring fixing hole and fixed for grinding.

[0032] Example 4: If the spring has a large free height and a small diameter, then Example 2 and Example 3 are combined to meet the actual usage requirements of the spring.

[0033] The above describes specific embodiments of the present invention and the technical principles employed. Any modifications or equivalent transformations based on the technical solutions of the present invention should be included within the protection scope of the present invention.

Claims

1. A spring fixing device for an automatic spring grinding machine, characterized in that: The assembly includes a grinding disc, a support sleeve, and an adjusting sleeve. The grinding disc is a circular structure with a hole machined at its center for connection to a spring grinding machine. Spring fixing holes are evenly distributed along the circumference of the grinding disc, and these holes are continuous vertically. Three threaded holes are evenly distributed along the circumference on each of the upper and lower annular end faces of the spring fixing holes. The support sleeve is an annular structure with three threaded holes evenly distributed along the circumference on each of the upper and lower annular end faces. The adjusting sleeve is an annular ring with internal threads. The outer wall of the adjusting sleeve does not exceed the range of the spring fixing holes. The internal threads of the adjusting sleeve consist of two threads with opposite directions of rotation. The screw assembly consists of three sets of screws. Each adjusting sleeve is threadedly connected to a left-hand bolt and a right-hand bolt to form a screw assembly. Three sets of screw assemblies form a set of adjusting sleeve assemblies. One end of each adjusting sleeve assembly is threadedly connected to the support sleeve, and the other end is threadedly connected to the grinding disc. This ensures that the upper and lower end faces of each spring fixing hole of the grinding disc are connected to adjusting sleeve assemblies and support sleeves. The center height of the grinding disc is located at half the free height of the spring. The vertical distance from the uppermost horizontal plane of the uppermost support sleeve to the lowermost horizontal plane of the lowermost support sleeve is less than the free height of the spring.

2. The automatic spring grinding machine spring fixing device according to claim 1, characterized in that: The inner diameter of the support sleeve is the same as the inner diameter of the spring fixing hole.

3. The automatic spring grinding machine spring fixing device according to claim 1, characterized in that: It also includes a pad, the height of which is the same as the height of the support sleeve. The pad is composed of multiple stacked annular bodies, that is, the inner diameter of adjacent larger pads is the same as the outer diameter of smaller pads, and the outer diameter of the largest pad is equal to the inner diameter of the support sleeve. The side wall of the pad has at least two connecting holes evenly distributed along the circumference. The inner wall of the pad is machined into a bevel around the connecting holes so that the nail head can sink into the bevel to prevent the inner diameter of the pad from being reduced. The support sleeve has corresponding connecting holes machined at the corresponding positions. The pad is fixed to the inside of the support sleeve by screws passing through the connecting holes. Different inner diameters can be selected by stacking multiple sleeves.

4. The automatic spring grinding machine spring fixing device according to claim 1, characterized in that: It also includes a pad, the height of which is the same as that of the support sleeve. The outer diameter of the pad is equal to the inner diameter of the support sleeve. The inner diameter of the pad has various specifications. At least two connecting holes are evenly distributed along the circumference of the side wall of the pad. The inner wall of the pad is machined into a bevel around the connecting holes so that the nail head can sink into the bevel and prevent the inner diameter of the pad from being reduced. The support sleeve has corresponding connecting holes machined at the corresponding positions. The pad is fixed to the inside of the support sleeve by screws passing through the connecting holes.

5. The automatic spring grinding machine spring fixing device according to claim 1, characterized in that: After the upper and lower ends of the set of adjustment sleeve components are respectively connected to the support sleeve, the other end of the support sleeve is connected to another set of adjustment sleeve components. Then the other end of the adjustment sleeve components is connected to the grinding disc to increase the overall height.

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