Clamping jig for top pin type elongated workpiece
By designing a combined structure of the main block and the movable positioning block, the problem that existing fixtures cannot clamp slender ejector pins is solved, and stable clamping and efficient processing of ejector pins of different diameters are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN FUGUANG TIANTONG OPTICS
- Filing Date
- 2025-04-16
- Publication Date
- 2026-06-16
AI Technical Summary
Existing clamping fixtures cannot effectively hold slender ejector pins of different diameters, especially ejector pins with a diameter of less than 3 mm and a height of more than 30 mm, resulting in inconvenient processing and low efficiency.
A clamping fixture comprising a main body block and a movable positioning block is designed. By tilting the V-groove of the main body and the V-groove of the slider, and by using positioning components, it can accommodate ejector pins of different diameters. Combined with the sliding of the movable positioning block and the guide post and the fixing of the locking components, stable clamping of the ejector pin is achieved.
It achieves stable clamping of ejector pins of different diameters, improves processing efficiency, and is particularly suitable for ejector pin processing of lens injection molds, simplifying the processing flow.
Smart Images
Figure CN224359752U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a clamping fixture for slender workpieces, such as ejector pins. Background Technology
[0002] Currently, injection molded products generally require ejector pins for ejection. Due to differences and characteristics in components, standard ejector pins require secondary processing to meet mold design requirements. In existing technology, existing clamping fixtures cannot hold ejector pins of different diameters. When the ejector pin diameter is less than 3 mm and the height is greater than 30 mm, it is difficult to clamp tightly because the ejector pin is too thin and long and is prone to vibration, causing inconvenience to processing. This is especially true for lens-type injection molds, which require a large number of ejector pins, resulting in long processing time per pin and low work efficiency. Utility Model Content
[0003] This invention addresses the aforementioned problem by providing a clamping fixture for slender workpieces, specifically a fixture for clamping ejector pins. This fixture is simple in structure and easy to use, and can clamp ejector pins of different diameters to facilitate subsequent processing and improve efficiency.
[0004] This utility model is constructed as follows: it includes a main body block and a movable positioning block disposed beside the main body block. The main body block and the movable positioning block are connected by guide posts. The main body block has a plurality of main body V-shaped grooves, and the movable positioning block has a plurality of slider V-shaped grooves. The main body V-shaped grooves and the slider V-shaped grooves correspond one to one. A positioning element A is disposed above the main body V-shaped groove, and a positioning element B is disposed above the slider V-shaped groove. Positioning elements A and B are used to confine the workpiece to the main body V-shaped groove and the slider V-shaped groove, respectively.
[0005] Furthermore, both positioning element A and positioning element B are inclined, as are the main body V-groove and the slider V-groove. The moving direction of positioning element A is directly opposite the opening of the main body V-groove, and the moving direction of positioning element B is directly opposite the opening of the slider V-groove.
[0006] Furthermore, both positioning element A and positioning element B are pointed fixing screws.
[0007] Furthermore, the movable positioning block is sleeved on the guide post and can slide along the guide post. The movable positioning block is provided with a locking element to fix or unlock the movable positioning block.
[0008] Furthermore, the movable positioning block includes a slide body and a slider disposed in the upper center of the slide body, with several slider V-grooves disposed on the slider.
[0009] Furthermore, a slot is provided in the middle of the slide body, and the slider is fixed in the slot of the slide body by a connector.
[0010] Furthermore, a pad may be provided between the bottom surface of the slider and the bottom surface of the groove in the slide body, or no pad may be provided.
[0011] Furthermore, the locking element is a locking screw.
[0012] Furthermore, the connector is a connecting screw.
[0013] Furthermore, the pointed fixing screw includes a fixing head, an upper stud, and a lower stud, wherein the diameter of the upper stud is larger than the diameter of the lower stud.
[0014] Compared with the prior art, this utility model has the following advantages: The device has a simple structure, reasonable design, and is easy to use. By first adjusting the distance between the movable positioning block and the main body block, it can accommodate ejector pins of different lengths, facilitating clamping. The ejector pin is placed on the V-groove of the main body and the V-groove of the slider, and different parts of the ejector pin are respectively confined to the V-groove of the main body and the V-groove of the slider by positioning components A and B, respectively. Then, the ejector pin can be processed. When encountering a stepped ejector pin, the large-diameter part of the stepped ejector pin is located within the V-groove of the main body, while the small-diameter part of the stepped ejector pin is within the V-groove of the slider. If a distance deviation occurs in the groove, a shim is added between the bottom surface of the groove between the slider and the slide block. This moves the position of the slider V-groove to the upper right, so that the main body V-groove and the slider V-groove are not on the same horizontal line. At this time, the small diameter part of the stepped ejector pin contacts and corresponds to the slider V-groove. Then, positioning parts A and B are used to limit different parts of the stepped ejector pin to the main body V-groove and the slider V-groove, respectively. Then, the ejector pin can be processed. By adjusting the relative position of the main body V-groove and the slider V-groove, ejector pins of different diameters can be clamped to ensure processing efficiency. Attached Figure Description
[0015] Figure 1 This is a three-dimensional embodiment of the present utility model. Figure 1 ;
[0016] Figure 2 This is a three-dimensional embodiment of the present utility model. Figure 2 ;
[0017] Figure 3 This is a top view of an embodiment of the present utility model;
[0018] Figure 4 yes Figure 3 Sectional view AA in the middle;
[0019] Figure 5 yes Figure 3 Sectional view BB in the middle;
[0020] Figure 6 yes Figure 3 Sectional view CC in the middle;
[0021] Figure 7 This is an exploded view of the movable positioning block according to an embodiment of the present invention;
[0022] Figure 8 This is a schematic diagram of a movable positioning block without added pads in an embodiment of the present invention;
[0023] Figure 9 This is a schematic diagram of a movable positioning block with added pad in an embodiment of this utility model;
[0024] Figure 10 This is a schematic diagram of the main block structure of an embodiment of this utility model;
[0025] Figure 11 This is a schematic diagram of a pointed fixing screw according to an embodiment of this utility model. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0027] Example: Figures 1-11 As shown in this embodiment of the utility model, a clamping fixture for slender workpieces of the ejector pin type is provided, including a main body block 1 and a movable positioning block 2 disposed beside the main body block. The main body block and the movable positioning block are connected by a guide post 3. The main body block has a plurality of main body V-grooves 101, and the movable positioning block has a plurality of slider V-grooves 203. The main body V-grooves and the slider V-grooves correspond one to one. A positioning element A4 is disposed above each main body V-groove, and a positioning element B5 is disposed above each slider V-groove. Positioning elements A and B are used to confine the workpiece to the main body V-groove and the slider V-groove, respectively. The aforementioned positioning element A extends from the top of the main body block into the main body V-groove and engages with a through hole threaded on the main body block. The positioning element B extends from the top of the movable positioning block into the slider V-groove and engages with a through hole threaded on the movable positioning block.
[0028] During operation, first adjust the distance between the movable positioning block and the main body block to accommodate ejector pins of different lengths for easy clamping. Place the ejector pin on the V-groove of the main body and the V-groove of the slider. Use positioning parts A and B to respectively limit different parts of the ejector pin to the V-groove of the main body and the V-groove of the slider, and then process the ejector pin. When encountering a stepped ejector pin, the large diameter part of the stepped ejector pin is in the V-groove of the main body, while the small diameter part of the stepped ejector pin deviates from the V-groove of the slider. At this time, by adding a shim between the bottom surface of the groove of the slider and the slide body, the position of the V-groove of the slider is moved to the upper right and adjusted so that the V-groove of the main body and the V-groove of the slider are not on the same horizontal line. At this time, the small diameter part of the stepped ejector pin contacts and corresponds to the V-groove of the slider. Then, use positioning parts A and B respectively to limit different parts of the stepped ejector pin to the V-groove of the main body and the V-groove of the slider, and then process the ejector pin.
[0029] Of course, the main V-shaped groove mentioned above can also be of other shapes. There are no restrictions here. As long as the groove has a V-shaped groove inside, such as a trapezoidal groove, a V-shaped groove is formed on the left side of the trapezoidal groove.
[0030] In this embodiment of the utility model, both positioning member A and positioning member B are inclined, and the inclination angles of positioning member A and positioning member B are the same. The main body V-groove and the slider V-groove are also inclined. The moving direction of positioning member A is directly opposite the opening of the main body V-groove, and the moving direction of positioning member B is directly opposite the opening of the slider V-groove.
[0031] By tilting the main body V-groove and the slider V-groove, the workpiece can roll down to the bottom of the V-groove by its own weight, which facilitates repeated installation and processing.
[0032] In this embodiment of the utility model, both positioning element A and positioning element B are pointed fixing screws; preferably, the pointed fixing screw includes a fixing head, an upper stud and a lower stud arranged sequentially from top to bottom, and the diameter of the upper stud is larger than the diameter of the lower stud; the front part of the workpiece ejector pin is limited to the V-groove of the main body by positioning element A, and the rear part of the workpiece ejector pin is limited to the V-groove of the slider by positioning element B.
[0033] In this embodiment of the utility model, in order to adjust the distance between the movable positioning block and the main body block and adapt to ejector pins of different lengths, the movable positioning block is sleeved on the guide post and can slide along the guide post. The movable positioning block is provided with a locking member 6, which passes through the movable positioning block and abuts against the guide post for fixation, so that the movable positioning block can be fixed or unlocked; the locking member is a locking screw; the movable positioning block is provided with a guide hole for the guide post to pass through.
[0034] When it is necessary to move the movable positioning block, the movable positioning block is moved and adjusted along the guide post by unlocking the locking device. After confirming the position, the movable positioning block is then tightened by locking the device.
[0035] The guide post and the main body block can be fixedly connected or detachably fixedly connected. If fixedly connected, the guide post and the main body block are welded together. If detachably connected, the guide post and the main body block are fixed together with fixing screws.
[0036] The aforementioned guide post has a limiting plate at one end, and the main block has a stepped hole and a connecting hole for the guide post to pass through. The stepped hole and the connecting hole are connected, and the diameter of the stepped hole is larger than that of the connecting hole. When the guide post is passed through the main block, the limiting plate corresponds to the stepped hole, thereby preventing the guide post from coming out of the main block. At the same time, the guide post and the main block are limited by fixing screws.
[0037] In this embodiment of the utility model, the movable positioning block 2 includes a slide body 201 and a slider 202 disposed in the upper middle part of the slide body, and a plurality of slider V-grooves 203 are disposed on the slider.
[0038] In this embodiment of the utility model, a slot 204 is provided in the middle of the slide body, and the slider is fixed in the slot of the slide body by a connector 205; the connector is a connecting screw.
[0039] The aforementioned slotted cross-section is a parallelogram, and the corresponding slider is also a parallelogram.
[0040] In this embodiment of the utility model, a pad is provided between the bottom surface of the slider and the inner bottom surface of the slot of the slide body, or no pad is provided.
[0041] When machining ordinary ejector pins, since all parts of the ordinary ejector pin have the same diameter, the main body V-groove and the slider V-groove are positioned to limit the movement, and no pad is needed. However, when machining stepped ejector pins, the front part of the ejector pin, which is limited by the main body V-groove, has a larger diameter, causing the rear part of the ejector pin to not be at the bottom of the slider V-groove. Therefore, a pad 206 needs to be placed between the bottom surface of the slider and the inner bottom surface of the slot of the slide block to move the position of the slider V-groove to the upper right, so that the main body V-groove and the slider V-groove are not on the same horizontal line, thus allowing the slider V-groove to better limit the stepped ejector pin.
[0042] In this embodiment of the utility model, when machining a common ejector pin, the locking element on the movable positioning block is first adjusted so that the movable positioning block can move along the guide post. The distance between the main body block and the movable positioning block is adjusted to a suitable position. The movable positioning block is then repositioned by the locking element, and the same workpiece is confined to the V-groove of the main body and the V-groove of the slider, respectively, and confined by positioning element A and positioning element B. Multiple workpieces are confined, and the entire fixture is locked on the worktable or magnetic table. Once the tool is aligned, multiple ejector pins can be machined at once. Finally, positioning elements A and B are unlocked, the ejector pin is removed, and a new ejector pin is inserted to continue machining.
[0043] When machining the stepped ejector pin 7, based on the differences in the diameter of the stepped ejector pin, loosen the connecting piece on the movable positioning block, remove the slider, and place a shim of appropriate height between the slider and the slot of the slide body to change the height of the slider, thereby changing the position of the slider V-groove. This makes the V-groove of the main body and the V-groove of the slider not on the same horizontal line, thus facilitating the limiting of different diameter parts of the stepped ejector pin. The remaining operations are the same as the above-described ordinary ejector pin machining operations.
[0044] When the end face has irregular shape processing, the clamping method of the workpiece remains unchanged, and the tooling fixture is locked on the pressure plate for fixation.
[0045] In this embodiment of the utility model, preferably, the fixture is suitable for fixing slender parts such as ejector pins with a diameter of 0.5-3 mm and a length of 30-220 mm, and can repeatedly position the workpiece and fix the stepped ejector pins.
[0046] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values to illustrate the technical solutions of this utility model. Furthermore, the numerical values listed above should not constitute a limitation on the scope of protection of this utility model.
[0047] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (e.g., manufactured by casting process) (except where it is obviously impossible to use an integral forming process).
[0048] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.
[0049] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.
[0050] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.
Claims
1. A clamping fixture for slender workpieces of the ejector pin type, characterized in that, The device includes a main body block and a movable positioning block disposed beside the main body block. The main body block and the movable positioning block are connected by guide posts. The main body block has a plurality of main body V-shaped grooves, and the movable positioning block has a plurality of slider V-shaped grooves. The main body V-shaped grooves and the slider V-shaped grooves correspond one to one. A positioning element A is disposed above the main body V-shaped groove, and a positioning element B is disposed above the slider V-shaped groove. Positioning elements A and B are used to confine the workpiece to the main body V-shaped groove and the slider V-shaped groove, respectively.
2. The jig for clamping slender workpieces of the ejector pin type according to claim 1, characterized in that, Both positioning element A and positioning element B are inclined, as are the main body V-groove and the slider V-groove. The moving direction of positioning element A is directly opposite the opening of the main body V-groove, and the moving direction of positioning element B is directly opposite the opening of the slider V-groove.
3. A clamping fixture for slender workpieces of the ejector pin type according to claim 1 or 2, characterized in that, Both positioning component A and positioning component B are pointed fixing screws.
4. A clamping fixture for slender workpieces of the ejector pin type according to claim 1, characterized in that, The movable positioning block is sleeved on the guide post and can slide along the guide post. The movable positioning block is provided with a locking element to fix or unlock the movable positioning block.
5. A clamping fixture for slender workpieces of the ejector pin type according to claim 1, characterized in that, The movable positioning block includes a slide body and a slider located in the upper center of the slide body, with several slider V-grooves provided on the slider.
6. A clamping fixture for slender workpieces of the ejector pin type according to claim 5, characterized in that, The slide body has a slot in the middle, and the slider is fixed in the slot of the slide body by a connector.
7. A clamping fixture for slender workpieces of the ejector pin type according to claim 6, characterized in that, A pad may be provided between the bottom surface of the slider and the inner bottom surface of the slot of the slide body, or no pad may be provided.
8. A clamping fixture for slender workpieces of the ejector pin type according to claim 4, characterized in that, The locking component is a locking screw.
9. A clamping fixture for slender workpieces of the ejector pin type according to claim 6, characterized in that, The connector is a connecting screw.
10. A clamping fixture for slender workpieces of the ejector pin type according to claim 3, characterized in that, The pointed fixing screw includes a fixing head, an upper stud, and a lower stud, wherein the diameter of the upper stud is larger than the diameter of the lower stud.