A quick positioning fixture for circular needle grinding machining
By designing a quick-positioning fixture, guide bars and elastic guide rods are used to achieve quick replacement and stable clamping of circular needles, solving the problems of long workpiece replacement time and unstable clamping in existing technologies, thus improving processing efficiency and applicability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG AOBANG TECH CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-07-07
AI Technical Summary
Existing circular needle grinding fixtures are time-consuming to change workpieces and have high instability and risk of damage when clamping workpieces of different diameters.
A quick positioning fixture is designed, comprising a fixture base, a fixed mounting block, a sliding clamping block, a guide mechanism, an elastic pressure part, and a manual control clamp. The sliding clamping block is guided and elastically clamped by guide bars and elastic guide rods. Combined with the manual control clamp and the intermediate connecting part, quick replacement and stable clamping are achieved.
It shortens workpiece changeover time, improves processing speed and clamping stability, expands the applicability of the fixture, and avoids unstable clamping or damage.
Smart Images
Figure CN224464376U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mold processing technology, specifically relating to a quick positioning fixture for grinding circular needles. Background Technology
[0002] Round pins, also known as push rods, insert pins, center pins, support pins, etc., are sometimes called ejector pins on lathes. They are most commonly used in plastic molds to separate products from the mold. Carbide round pins, such as tungsten steel round pins, can be used to pass through longer and narrower holes. Ejector pins, also called centers, are conical metal rods with heads that are mounted on lathes or grinding machines to support workpieces and allow them to rotate around them. Ejector pins in plastic molds can also be used inside the mold to provide stability and are called insert pins.
[0003] Domestic utility model patent application CN202222397379.7 discloses a flat ejector pin clamp, comprising: a clamping mechanism for clamping both ends of a flat ejector pin, an electromagnetic chuck mounted on a grinding machine, having a fixed block, a movable block, and a driving assembly for driving the movable block closer to or away from the fixed block; and a support base for supporting the flat ejector pin, located between the fixed block and the movable block, with an upward-opening groove on its top, the groove being horizontally positioned and accommodating the cylindrical portion of the flat ejector pin. This utility model can improve stability, reduce processing errors, and lower the scrap rate. The aforementioned utility model uses a lead screw to clamp the ejector pin with the movable block, a process that is lengthy, requiring rotation of the lead screw and manual adjustment to change the workpiece. Changing the workpiece is time-consuming, and improper operation can easily lead to unstable clamping or workpiece damage for workpieces of different diameters. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a quick positioning fixture for circular needle grinding, including a fixture base, on which are mounted a fixed mounting block, a fixed clamping block, a sliding clamping block located between the fixed mounting block and the fixed clamping block, a guide mechanism for guiding the sliding clamping block, an elastic pressure part for applying elastic force to the sliding clamping block, a manual control clamp, and an intermediate connecting part connecting the sliding clamping block and the manual control clamp. The guide mechanism includes a connecting block connected to the sliding clamping block, a recessed part connected to the connecting block, and a guide block connected to the recessed part. The manual control clamp drives the sliding clamping block to slide away from the fixture base by overcoming the elastic force of the elastic pressure part through the intermediate connecting part. When the force acting on the manual control clamp disappears, the sliding clamping block slides towards the fixture base under the action of the elastic force of the elastic pressure part.
[0005] As a further preferred technical solution of this utility model, a guide strip is provided on the clamp base at the bottom of the recess, and a notch is formed between the bottom of the recess and the connecting block to guide the guide strip.
[0006] During use, the bottom of the recessed part cooperates with the guide bar to guide the sliding clamping block. In addition, the guide rail structure can also guide the sliding clamping block.
[0007] As a further preferred technical solution of this utility model; the elastic pressure application part includes two sets of elastic guide rods fixedly installed with the sliding clamping block. The sliding clamping block has two sets of positioning holes for docking and installing the elastic guide rods. The fixed clamping block has a guide opening. The elastic guide rods have threaded portions at both ends and are fixedly installed with the sliding clamping block and the fixed clamping block respectively by bolts. One end of the elastic guide rod has a rod portion that passes through the guide opening. A spring portion is installed on the outside of the elastic guide rod between the sliding clamping block and the fixed clamping block.
[0008] Two sets of elastic guide rods apply elastic pressure to the sliding clamping block, causing one end of the sliding clamping block to fit against the outer wall of the fixed mounting block, thereby achieving the clamping effect.
[0009] As a further preferred technical solution of this utility model, the manual control clamp includes two sets of rotating bases installed vertically, a connecting seat fixedly installed with one set of the rotating bases, a lever fixedly installed with the other set of the rotating bases, a force-bearing end fixedly installed on the rotating base at the extension end of the lever, and a positioning plate fixedly installed with the force-bearing end. A fixed side plate is fixedly installed on the fixed clamping block, and the fixed side plate is fixedly installed with the connecting seat.
[0010] The connecting seat is fixedly installed with the fixed side plate, so that the fixed clamping block is connected and fixed to a set of rotating bases, ensuring the fixing effect of the connecting seat, thereby facilitating the operation of another set of rotating bases. Torsion springs are provided inside the rotating bases.
[0011] As a further preferred technical solution of this utility model, the intermediate connecting part includes a spring bolt fixedly installed through the recess and a locking plate fixedly installed at the other end of the spring bolt, and the locking plate is fixedly connected to the positioning plate.
[0012] By gripping the lever to adjust the position of the force-bearing end, the force-bearing end is pressed against the positioning plate, causing the positioning plate to move the locking plate. This, in turn, moves the recessed part fixed to the spring bolt, thereby moving the sliding clamping block away from the fixed mounting block. This creates a gap between the sliding clamping block and the fixed mounting block, allowing the circular needle to be placed. The circular needle is then placed into the clamping groove on the sliding clamping block. After releasing the lever, the torsion spring inside the rotating base returns the positioning plate to its initial position. The elastic pressure part then pushes the sliding clamping block to clamp the circular needle.
[0013] As a further preferred technical solution of this utility model, both the sliding clamping block and the fixed mounting block are provided with clamping grooves with corresponding positions.
[0014] The circular needle is placed directly into the clamping groove on the sliding clamping block and the fixed mounting block for processing.
[0015] As a further preferred technical solution of this utility model, the sliding clamping block is snapped onto a clamping plate, and the clamping plate and the fixed mounting block are provided with clamping grooves corresponding to their positions.
[0016] By adjusting the clamping plates, clamping plates with different clamping slot sizes can be used depending on the diameter of the circular needle to be processed. Beneficial effects
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] 1. The circular needle clamping mechanism allows for quick changes via a lever, suitable for grinding large quantities of circular needles sequentially, thus reducing needle replacement time. It ensures stable clamping of the circular needles while accelerating processing speed and increasing the overall machining rate. Simultaneously, it avoids the instability or damage to the workpiece caused by manual screw rotation and improper operation.
[0019] 2. By configuring the clamping plates, different clamping slot sizes can be used to accommodate different diameters of the circular needles to be processed, increasing the applicability of the fixture. Furthermore, the clamping plates can be easily and quickly removed from the top of the sliding clamping block for replacement. This method is simple to operate and does not adversely affect the clamping effect on the circular needles. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the rear view structure of this utility model;
[0022] Figure 3This is a cross-sectional structural diagram of the present invention;
[0023] Figure 4 This is a cross-sectional structural diagram of the fixed mounting block location in this utility model.
[0024] In the diagram: 1. Fixture base; 11. Fixed mounting block; 12. Fixed clamping block; 121. Fixed side plate; 122. Guide opening; 13. Sliding clamping block; 131. Limiting groove; 132. Positioning hole; 14. Clamping groove; 15. Guide bar; 2. Guide mechanism; 21. Guide block; 22. Recessed part; 23. Connecting part; 3. Elastic pressure part; 31. Elastic guide rod; 32. Threaded part; 33. Spring part; 34. Rod part; 4. Clamping plate; 41. Positioning part; 5. Manual control clamp; 51. Force-bearing end; 52. Rotating base; 53. Actuating handle; 54. Positioning plate; 55. Connecting seat; 6. Intermediate connecting part; 61. Spring bolt; 62. Locking plate. Detailed Implementation
[0025] This specific embodiment is a quick positioning fixture for circular needle grinding.
[0026] The utility model mentioned above uses a lead screw to make a moving block clamp a circular needle. This process is relatively long, requiring the lead screw to be rotated and manually adjusted to change the workpiece. Changing the workpiece is time-consuming, and improper operation may easily lead to unstable clamping or damage to the workpiece for workpieces of different diameters.
[0027] Example 1: Its structural schematic diagram is as follows Figures 1-4As shown. A quick positioning fixture for circular needle grinding includes a fixture base 1, on which are mounted a fixed mounting block 11, a fixed clamping block 12, a sliding clamping block 13 located between the fixed mounting block 11 and the fixed clamping block 12, and a guide mechanism 2 for guiding the sliding clamping block 13. The guide mechanism 2 includes a connecting block 23 connected to the sliding clamping block 13, a recess 22 connected to the connecting block 23, and a guide block 21 connected to the recess 22. A guide strip 15 is provided on the fixture base 1 at the bottom of the recess 22, and a notch is formed between the bottom of the recess 22 and the connecting block 23 to guide the guide strip 15. During use, the bottom of the recess 22 and the guide strip 15 cooperate to guide the sliding clamping block 13. In addition, a guide rail structure can also guide the sliding clamping block 13. An elastic pressure part 3 for applying elastic force to the sliding clamping block 13 is also installed. The elastic pressure application part 3 includes two sets of elastic guide rods 31 fixedly installed on the sliding clamping block 13. The sliding clamping block 13 has two sets of positioning holes 132 for mating and installing the elastic guide rods 31. The fixed clamping block 12 has a guide opening 122. The elastic guide rods 31 have threaded portions 32 at both ends and are fixedly installed on the sliding clamping block 13 and the fixed clamping block 12 respectively by bolts. One end of the elastic guide rod 31 has a rod portion 34 fixedly installed through the guide opening 122. A spring portion 33 is installed on the outside of the elastic guide rod 31 between the sliding clamping block 13 and the fixed clamping block 12. The two sets of elastic guide rods 31 apply elastic pressure to the sliding clamping block 13, causing one end of the sliding clamping block 13 to fit against the outer wall of the fixed mounting block 11, thereby achieving a clamping effect.
[0028] It also includes a manual control clamp 5 and an intermediate connecting part 6 that connects the sliding clamping block 13 and the manual control clamp 5. The manual control clamp 5 includes two sets of rotating bases 52 mounted vertically, connecting seats 55 fixedly mounted to the rotating bases 52 respectively, a lever 53, a force-bearing end 51 fixedly mounted on the extended end of the rotating base 52 of the lever 53, and a positioning plate 54 fixedly mounted to the force-bearing end 51. A fixed side plate 121 is fixedly mounted on the fixed clamping block 12, and the fixed side plate 121 is fixedly mounted to the connecting seat 55. By fixing the connecting seat 55 to the fixed side plate 121, the fixed clamping block 12 is connected and fixed to one set of rotating bases 52, ensuring the fixing effect of the connecting seat 55, thereby facilitating the operation of the other set of rotating bases 52. A torsion spring is provided inside the rotating bases 52. The manual control clamp 5 drives the sliding clamping block 13 to slide away from the clamp base 1, overcoming the elastic force of the elastic pressure part 3, through the intermediate connecting part 6. After the force acting on the manual control clamp 5 disappears, the sliding clamping block 13 slides towards the clamp base 1 under the action of the elastic force of the elastic pressure part 3. The intermediate connecting part 6 includes a spring bolt 61 fixedly installed through the recess 22 and a locking plate 62 fixedly installed at the other end of the spring bolt 61. The locking plate 62 is fixedly connected to the positioning plate 54. By gripping and tightening the handle 53 to adjust the position of the force-bearing end 51, the force-bearing end 51 presses against the positioning plate 54, causing the positioning plate 54 to move the locking plate 62. This, in turn, pulls the recessed part 22, which is fixed to the spring bolt 61, to move, thereby pulling the sliding clamping block 13 away from the fixed mounting block 11. Both the sliding clamping block 13 and the fixed mounting block 11 have corresponding clamping grooves 14, creating a gap between them for placing a circular needle. The circular needle is placed into the clamping grooves 14 on the sliding clamping block 13 and the fixed mounting block 11. Releasing the handle 53 causes the positioning plate 54 to return to its initial position under the action of the torsion spring inside the rotating base 52. The elastic pressure part 3 then pushes the sliding clamping block 13, clamping the circular needle.
[0029] Example 2: A clamping plate 4 is snapped onto one end of the sliding clamping block 13 near the fixed mounting block 11. The sliding clamping block 13 has two sets of limiting grooves 131. A positioning part 41, which cooperates with the limiting grooves 131, is fixedly installed on the clamping plate 4. By inserting the positioning part 41 into the limiting groove 131 above the sliding clamping block 13, the clamping plate 4 is snapped onto and fixed to the sliding clamping block 13. Clamping grooves 14 with corresponding positions are provided on both the clamping plate 4 and the fixed mounting block 11. By using the clamping plate 4, clamping plates 4 with different clamping groove sizes can be replaced according to the diameter of the required circular needle, increasing the applicability of the fixture. Furthermore, the clamping plate 4 can be disassembled and replaced by directly pulling it out from the top of the sliding clamping block 13. This replacement method is convenient, quick, and simple to operate, and does not adversely affect the clamping effect on the circular needle.
[0030] By gripping the lever 53 to adjust the position of the force-bearing end 51, the force-bearing end 51 presses against the positioning plate 54, causing the positioning plate 54 to move the locking plate 62, thereby pulling the recessed part 22 fixed to the spring bolt 61 to move, which in turn pulls the sliding clamping block 13 to move away from the fixed mounting block 11, creating a gap between the sliding clamping block 13 and the fixed mounting block 11 for placing the circular needle. The circular needle is placed into the clamping groove 14 on the sliding clamping block 13. Then, the lever 53 is released, and under the action of the torsion spring inside the rotating base 52, the positioning plate 54 returns to its initial position, thereby pushing the sliding clamping block 13 by the elastic pressure part 3 to clamp the circular needle. By controlling the lever 53, the circular needle can be quickly changed and clamped, which is suitable for the process of grinding a large number of circular needles in sequence, shortening the time for changing the circular needle. While ensuring the stability of the circular needle clamping, it accelerates the processing speed of the circular needle and increases the processing rate of the circular needle. At the same time, it avoids manual rotation of the lead screw clamping, which may cause unstable clamping or damage to the workpiece due to improper operation.
[0031] All technical features in this embodiment can be freely combined according to actual needs.
[0032] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.
Claims
1. A quick positioning fixture for grinding circular needles, characterized in that, The fixture includes a clamp base (1), on which are mounted a fixed mounting block (11), a fixed clamping block (12), a sliding clamping block (13) located between the fixed mounting block (11) and the fixed clamping block (12), a guide mechanism (2) for guiding the sliding clamping block (13), an elastic pressure part (3) for applying elastic force to the sliding clamping block (13), a manual control clamp (5), and an intermediate connecting part (6) connecting the sliding clamping block (13) and the manual control clamp (5). The guide mechanism (2) includes a component connected to the sliding clamping block (13). The manual control clamp (5) is connected to the connecting block (23), the recessed part (22) connected to the connecting block (23), and the guide block (21) connected to the recessed part (22). The manual control clamp (5) drives the sliding clamping block (13) to overcome the elastic force of the elastic pressure part (3) and slide away from the clamp base (1) through the intermediate connecting part (6). When the force acting on the manual control clamp (5) disappears, the sliding clamping block (13) slides towards the clamp base (1) under the action of the elastic force of the elastic pressure part (3).
2. The quick positioning fixture for grinding circular needles according to claim 1, characterized in that: A guide strip (15) is provided on the clamp base (1) at the bottom of the recess (22), and a notch is formed between the bottom of the recess (22) and the connecting block (23) to guide the guide strip (15).
3. A quick positioning fixture for grinding circular needles according to claim 1, characterized in that: The elastic pressure part (3) includes two sets of elastic guide rods (31) fixedly installed with the sliding clamping block (13). The sliding clamping block (13) has two sets of positioning holes (132) for docking and installing the elastic guide rods (31). The fixed clamping block (12) has a guide opening (122). The elastic guide rods (31) have threaded portions (32) at both ends and are fixedly installed with the sliding clamping block (13) and the fixed clamping block (12) respectively by bolts. One end of the elastic guide rod (31) is fixedly installed with a rod portion (34) that passes through the guide opening (122). A spring portion (33) is installed on the outside of the elastic guide rod (31) between the sliding clamping block (13) and the fixed clamping block (12).
4. A quick positioning fixture for grinding circular needles according to claim 1, characterized in that: The manual control clamp (5) includes two sets of rotating bases (52) installed vertically, a connecting seat (55) fixedly installed with one set of the rotating bases (52), a lever handle (53) fixedly installed with the other set of the rotating bases (52), a force-bearing end (51) fixedly installed on the rotating base (52) at the extension end of the lever handle (53), and a positioning plate (54) fixedly installed with the force-bearing end (51). A fixed side plate (121) is fixedly installed on the fixed clamping block (12), and the fixed side plate (121) is fixedly installed with the connecting seat (55).
5. A quick positioning fixture for grinding circular needles according to claim 4, characterized in that: The intermediate connecting part (6) includes a spring bolt (61) fixedly installed through the recess (22) and a locking plate (62) fixedly installed at the other end of the spring bolt (61), the locking plate (62) being fixedly connected to the positioning plate (54).
6. A quick positioning fixture for grinding circular needles according to claim 1, characterized in that: Both the sliding clamping block (13) and the fixed mounting block (11) are provided with clamping grooves (14) corresponding to their positions.
7. A quick positioning fixture for grinding circular needles according to claim 1, characterized in that: The sliding clamping block (13) is fitted with a clamping plate (4), and the clamping plate (4) and the fixed mounting block (11) are provided with clamping grooves (14) corresponding to the positions.