A workpiece machining auxiliary clamping fixture

Abstract

This invention provides a workpiece machining auxiliary clamping fixture, including a base, a body, and a guide. The body is movably fitted inside the base, and the guide is movably connected to the upper part of the body. When the tensioning member is pulled, causing the slider to approach the base, a first spring is compressed, and simultaneously, the locking groove pushes the locking protrusion, causing the locking block to rotate and extending the locking part from inside the body to outside. After the first spring is compressed, a second spring is compressed again, causing the body to move closer to the base. When the pull rod is released, the second spring extends, causing the body to move away from the base, and then the first spring extends, causing the slider to approach the upper part of the first sliding groove and push the locking block to rotate, causing the locking part to retract from the outside of the body to the inside. This workpiece machining auxiliary clamping fixture can be used for both positioning and clamping of the workpiece, achieving multiple functions for a single workpiece. Furthermore, this workpiece machining auxiliary clamping fixture has a compact structure, is easy to maintain and process, and has high efficiency in positioning and clamping workpieces.

Description

Technical Field

[0001] This invention relates to the field of machining clamping fixtures, and in particular to an auxiliary clamping fixture for workpiece machining. Background Technology

[0002] In current machining production, the processing of parts generally requires positioning them before cutting or welding. For example, in the processing of sheet metal parts, the sheet metal must first be positioned, and then the part is clamped and fixed using a fixture to ensure that the part does not move during processing and thus ensures machining accuracy. However, since the current part positioning and clamping process is generally carried out by two fixtures, there are many auxiliary parts for part positioning and clamping, which is not conducive to improving product processing efficiency.

[0003] For example, Chinese patent CN 216371064 U discloses an energy-saving and convenient auxiliary worktable, including an auxiliary table, its own bed surface, a pad, fastening screws, positioning pins, and pressure plate screws. The surface of the auxiliary table has several countersunk holes for fastening screws, each with a fastening screw. The fastening screw passes through the countersunk hole and then through the pad to connect with its own bed surface. The upper surface of the auxiliary table has several positioning pin holes, each with a positioning pin. The upper surface of the auxiliary table has engraved lines and several screw holes, which are tightened into the pressure plate screws. This energy-saving and convenient auxiliary worktable, by setting up various versatile positioning and clamping components, allows the worktable to be flexibly applied to the positioning and processing of various parts. However, the positioning and clamping of this worktable are divided into different components; that is, the positioning pins are only used for positioning, and other components are used for clamping. This results in low efficiency in the positioning and clamping operations of parts, which is not conducive to improving the processing efficiency of parts. Summary of the Invention

[0004] In order to solve the problem that in the existing technology, the positioning and clamping of parts are completed separately by separate components during the machining process, which makes the positioning and clamping operation of parts complicated and inefficient.

[0005] The technical solution of the present invention:

[0006] A workpiece machining auxiliary clamping fixture is provided, including a base, a body, and a guide. The body is movably sleeved within the base, and the guide is movably connected to the upper part of the body. The body has a limiting cavity, a first sliding groove, a second sliding groove, and a mounting hole. A tensioning member and a locking block are movably connected within the limiting cavity. The locking block includes a clamping part, a mounting post, and a locking protrusion. The clamping part and the locking protrusion are L-shaped, and the mounting post is rotatably connected to the mounting hole so that the locking block can rotate along the mounting post. The tensioning member includes a pull rod and a slider. The slider has a locking groove, one end of which is slidably connected to the first sliding groove, and the other end is slidably connected to the second sliding groove. The locking protrusion abuts against the locking groove within the limiting cavity. The pull rod passes through the bottom of the body and extends outward from the base. The second sliding groove... A first spring is provided, with one end abutting against the connection between the pull rod and the slider of the tensioning member, and the other end abutting against the bottom of the second slide groove. A second spring is provided between the bottom of the body and the base, with one end abutting against the inside of the base and the other end abutting against the bottom of the body. When the tensioning member is pulled to make the slider approach the base, the first spring is compressed, and at the same time, the slot pushes the cam to rotate, causing the locking part to extend from inside the body to outside. After the first spring is compressed, the second spring is compressed again, and the body moves closer to the base. When the pull rod is released, the second spring extends, causing the body to move away from the base, and the first spring extends, causing the slider to approach the upper part of the first slide groove and push the locking block to rotate, causing the locking part to retract from the outside of the body to the inside of the body.

[0007] Furthermore, in order to better limit the rotation space of the clamping block relative to the slider and prevent the clamping protrusion from disengaging from the clamping groove due to the movement of the slider, the clamping block is provided with a limiting protrusion. When the tensioning member is pulled to make the slider approach the base, the first spring is compressed and the clamping groove pushes the clamping protrusion to rotate the clamping block so that the clamping part extends from inside the body to outside the body. The limiting protrusion abuts against the side of the slider to limit the slider from approaching the bottom of the second groove.

[0008] Furthermore, in order to improve the service life of the workpiece processing auxiliary clamping fixture of the present invention, since the outer surface of the guide part is often rubbed by the positioning hole of the workpiece when clamping the workpiece, which can easily cause wear of the guide part, the guide part is detachably connected to the body by screws. At the same time, in order to reduce the friction between the guide part and the workpiece being positioned and clamped, the upper part of the guide part is set to be smaller than the lower part and is tapered.

[0009] Furthermore, in order to further enable the guide part to play a better role in positioning and guiding the workpiece, the bottom of the guide part is sleeved on the upper part of the body, and the bottom shape of the guide part is fully matched with the upper part of the body, so that the workpiece being positioned can be better clamped from the guide part to the body.

[0010] Furthermore, the workpiece processing auxiliary clamping fixture of the present invention, since a large number of parts are set in the body, in order to facilitate the easy disassembly and maintenance of the parts in the body, and at the same time reduce the processing cost of the body, the body is set to be composed of two half-cylinders spliced ​​together, that is, two half-cylinders with symmetrical structure are set. Due to the symmetrical structure, the splicing and installation of the two half-cylinders is more convenient and simple, less prone to errors, thereby improving the assembly efficiency of the body.

[0011] Furthermore, in order to ensure the structural strength of the main body composed of two symmetrically spliced ​​semi-cylinders, the present invention provides an upper protrusion, a lower protrusion, an upper groove, and a lower groove on the semi-cylinders. When the two semi-cylinders are spliced, the upper protrusion engages with the upper groove, and the lower protrusion engages with the lower groove.

[0012] Furthermore, in order to improve the positioning and clamping effect of the workpiece in the auxiliary clamping fixture of the present invention, two locking blocks are provided in the body, and the slider is provided with locking slots on the left and right sides, and the two locking blocks are provided on both sides of the slider.

[0013] Furthermore, in this invention, a workpiece processing auxiliary clamping fixture is provided. To ensure that the clamping block and the body can rotate and slide accordingly when the stretched part moves, two first springs are provided in the second slide groove, and the two first springs are provided on both sides of the second slide groove.

[0014] Furthermore, in the workpiece processing auxiliary clamping fixture of the present invention, in order to further ensure that the clamping block and the body can rotate and slide accordingly when the stretched part moves, the elastic coefficient of the second spring is greater than that of the first spring.

[0015] Furthermore, in order to improve the applicability of the workpiece processing auxiliary clamping fixture, the main body of the present invention is cylindrical, the base is cylindrical, and the guide part is conical.

[0016] The beneficial effects of this invention are:

[0017] This invention discloses a workpiece machining auxiliary clamping fixture comprising a base, a body, and a guide. The body is movably fitted inside the base, and the guide is movably connected to the upper part of the body. When the tensioning member is pulled, causing the slider to approach the base, a first spring is compressed, and simultaneously, a locking groove pushes a locking protrusion, causing the locking block to rotate and extending the clamping part from inside the body to outside. After the first spring is compressed, a second spring further compresses, causing the body to move closer to the base. When the pull rod is released, the second spring extends, causing the body to move away from the base, and then the first spring extends, causing the slider to approach the upper part of the first sliding groove and push the locking block to rotate, causing the clamping part to retract from the outside of the body to the inside. This workpiece machining auxiliary clamping fixture can be used for both positioning and clamping of the workpiece, achieving multiple functions for a single workpiece. Furthermore, this workpiece machining auxiliary clamping fixture has a compact structure, is easy to maintain and process, and offers high efficiency in workpiece positioning and clamping. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of a workpiece machining auxiliary clamping fixture according to the present invention;

[0019] Figure 2 This is a schematic diagram showing the clamping part of a workpiece machining auxiliary clamping fixture located outside the main body.

[0020] Figure 3 This is a schematic diagram of the clamping part of the workpiece machining auxiliary clamping fixture of the present invention located outside the main body;

[0021] Figure 4 This is a cross-sectional view of the clamping part of the workpiece machining auxiliary clamping fixture of the present invention located outside the main body;

[0022] Figure 5 This is a schematic diagram showing the clamping part of the workpiece machining auxiliary clamping fixture of the present invention located inside the main body;

[0023] Figure 6 This is a schematic diagram of the structure of the workpiece machining auxiliary clamping fixture of the present invention, in which the clamping part is located inside the main body;

[0024] Figure 7 This is a cross-sectional view of the clamping part of the workpiece machining auxiliary clamping fixture of the present invention located inside the main body;

[0025] Figure 8 This is a schematic diagram of the clamping block structure of a workpiece machining auxiliary clamping fixture according to the present invention;

[0026] Figure 9 This is a schematic diagram of the tensioning component structure of a workpiece machining auxiliary clamping fixture according to the present invention;

[0027] Figure 10 This is a schematic diagram of the main body structure of a workpiece machining auxiliary clamping fixture according to the present invention;

[0028] Names and numbers in the diagram: 1. Base; 2. Body; 201. Limiting cavity; 202. First slide groove; 203. Second slide groove; 204. Mounting hole; 205. Upper protrusion; 206. Lower protrusion; 207. Upper groove; 208. Lower groove; 3. Pulling member; 301. Pull rod; 302. Slider; 303. Slot; 4. Guide part; 401. Connecting hole; 5. Locking block; 501. Locking part; 502. Locking protrusion; 503. Mounting post; 504. Limiting protrusion; 6. First spring; 7. Second spring. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 7 As shown, the present invention provides a workpiece machining auxiliary clamping fixture, including a base 1, a body 2, and a guide part 4. The body 2 is movably sleeved within the base 1 and can slide flexibly along the sleeved portion. The guide part 4 has a connecting hole 401, and the guide part 4 is fixedly connected to the upper part of the body 2 by screws passing through the connecting hole 401 as a positioning guide for the workpiece being machined; Figure 10 The main body 2 shown is provided with a limiting cavity 201, a first sliding groove 202, a second sliding groove 203, and a mounting hole 204; as shown Figure 1 and Figure 10 As shown, the limiting cavity 201 is movably connected to the tension member 3 and the locking block 5; as Figure 8 The shown locking block 5 includes a locking part 501, a mounting post 503, and a locking protrusion 502. The locking part 501 and the locking protrusion 502 are L-shaped. The mounting post 503 is rotatably connected to the mounting hole 204 so that the locking block 5 can rotate along the mounting post 503. Figure 9 The tensioning member 3 shown includes a pull rod 301 and a slider 302. The slider 302 has a slot 303. One end of the slider 302 is slidably connected to a first slide groove 202, and the other end is slidably connected to a second slide groove 203. A locking protrusion 502 abuts against the slot 303 within the limiting cavity 201. The pull rod 301 passes through the bottom of the body 2 and extends outward from the base 1. A first spring 6 is provided within the second slide groove 203. One end of the first spring 6 abuts against the connection between the pull rod 301 and the slider 302 of the tensioning member 3, and the other end abuts against the bottom of the second slide groove 203. A second spring 7 is provided between the bottom of the body 2 and the base 1. One end of the second spring 7 abuts against the base 1, and the other end abuts against the bottom of the body 2. Figures 2 to 4 As shown, when the tensioning member 3 is pulled so that the slider 302 approaches the base 1, the first spring 6 is compressed, and at the same time, the slot 303 pushes the latch 502 to rotate the latch block 5, causing the clamping part 501 to extend from inside the body 2 to outside the body 2. After the first spring 6 is compressed, the second spring 7 is compressed again, and the body 2 moves closer to the base 1; as Figures 5 to 7As shown, when the pull rod 301 is released, the second spring 7 extends, causing the body 2 to move away from the base 1, and the first spring 6 extends, causing the slider 302 to approach the upper part of the first groove 202 and push the locking block 5 to rotate, causing the locking part 501 to retract from the outside of the body 2 to the inside of the body 2.

[0031] When using the workpiece machining auxiliary clamping fixture of the present invention for workpiece positioning and clamping, first fix the workpiece machining auxiliary clamping fixture of the present invention on the corresponding bracket fixture, and at the same time open a through hole matching the body 2 on the workpiece to be positioned. The workpiece machining auxiliary clamping fixture of the present invention can be used alone to position and clamp a workpiece, or it can be used in conjunction with other limiting modules to limit the workpiece. The pulling of the tension member 3 on the workpiece machining auxiliary clamping fixture of the present invention can be achieved by connecting the pull rod 301 on the tension member 3 through pneumatic, hydraulic, electric or other pulling methods according to the on-site fixture configuration. When positioning and fixing the workpiece, fix the base 1 in the corresponding position corresponding to the position of the positioning hole reserved on the workpiece to be positioned. It is necessary to configure the corresponding limit plate to restrict the movement of the workpiece along the bottom pull rod 301. The specific configuration can be determined according to the workpiece to be positioned and clamped. When the workpiece is fitted onto the body 2 with its thickness not exceeding the height of the clamping part 501 relative to the base 1 within the body 2, pulling the lever 301 causes the slider 302 to approach the base 1. Simultaneously, the slot 303 pushes the protrusion 502, causing the clamping part 501 to extend from inside the body 2 to outside. After the first spring 6 is compressed, the second spring 7 further compresses, causing the body 2 to move closer to the base 1, thus clamping the workpiece with the clamping part 501. When it is necessary to release the clamping of the workpiece, releasing the lever 301 causes the slider 302 to slide towards the top of the first groove 202 due to the elastic force of the first spring 6 and the second spring 7, resulting in the clamping part 501 retracting into the body 2, thereby releasing the clamping effect of the clamping part 501 on the workpiece. This workpiece machining auxiliary clamping fixture can be used for positioning and clamping of the workpiece, realizing multiple functions of one workpiece. At the same time, this workpiece machining auxiliary clamping fixture has a compact structure, is easy to maintain and process, and has high positioning and clamping efficiency for workpieces.

[0032] Furthermore, the present invention provides a workpiece machining auxiliary clamping fixture, such as... Figure 1 and Figure 8As shown, in order to better limit the rotation space of the block 5 relative to the slider 302 and prevent the locking protrusion 502 from disengaging from the locking groove 303 due to the movement of the slider 302, a limiting protrusion 504 is provided on the block 5. When the tensioning member 3 is pulled to make the slider 302 approach the base 1, the first spring 6 is compressed and the locking groove 303 pushes the locking protrusion 502 to drive the block 5 to rotate, so that the locking part 501 extends from the inside of the body 2 to the outside of the body 2. The limiting protrusion 504 abuts against the side of the slider 302 to limit the slider 302 from approaching the bottom of the second sliding groove 203 and also to limit the further rotation of the block 5.

[0033] Furthermore, the present invention provides a workpiece machining auxiliary clamping fixture, such as... Figure 1 As shown, in order to improve the service life of this device, since the outer surface of the guide part 4 is often rubbed by the positioning hole of the workpiece when clamping the workpiece, which can easily cause wear of the guide part 4, a connecting hole 401 is provided on the guide part 4. The guide part 4 is fixedly connected to the upper part of the body 2 by screws passing through the connecting hole 401, so that the guide part 4 is detachably connected to the body 2 by screws to facilitate the disassembly and maintenance of the guide part 4. At the same time, in order to reduce the friction between the guide part 4 and the workpiece being positioned and clamped, the upper part of the guide part 4 is smaller than the lower part and is tapered.

[0034] Furthermore, in this invention, a workpiece machining auxiliary clamping fixture, to further enhance the guiding part 4's ability to effectively position and guide the workpiece, such as... Figure 1 As shown, the bottom of the guide part 4 is sleeved on the upper part of the body 2, and the bottom shape of the guide part 4 is fully matched with the upper part of the body 2, so that the positioned workpiece can be well snapped from the guide part 4 to the body 2.

[0035] Furthermore, the workpiece processing auxiliary clamping fixture of the present invention, since a large number of parts are set in the body 2, in order to facilitate the easy disassembly and maintenance of the parts inside the body 2, and at the same time reduce the processing cost of the body 2, the body 2 is set to be composed of two half-columns spliced ​​together, that is, two symmetrical half-columns are set. Due to the symmetrical structure, the splicing and installation of the two half-columns is more convenient and simple, less prone to errors, thereby improving the assembly efficiency of the body 2.

[0036] Furthermore, the present invention provides a workpiece machining auxiliary clamping fixture, such as... Figure 1 Place Figure 10As shown, to ensure the structural strength of the body 2, which is symmetrically spliced ​​from two semi-cylinders, the semi-cylinders of the body 2 are provided with an upper protrusion 205, a lower protrusion 206, an upper groove 207, and a lower groove 208. When the two semi-cylinders are spliced, the upper protrusion 205 engages with the upper groove 207, and the lower protrusion 206 engages with the lower groove 208. That is, by designing the structure of the body 2 symmetrically, the body 2 is composed of two symmetrical and structurally identical parts, which can effectively reduce the number of parts used in the entire tooling, thereby reducing the complexity of the tooling's production and processing.

[0037] Furthermore, the present invention provides a workpiece machining auxiliary clamping fixture, such as... Figure 1 As shown, to improve the positioning and clamping effect of the clamping fixture on the parts, two locking blocks 5 are provided inside the body 2, and locking slots 303 are provided on the left and right sides of the slider 302. The two locking blocks 5 are located on both sides of the slider 302. By designing the two locking blocks 5 at both ends of the slider 302, the force on the slider 302 is more balanced. At the same time, since the locking blocks 5 are provided on both sides of the body 2, the workpiece can be clamped from both sides of the body 2, thereby improving the clamping effect of the fixture on the workpiece.

[0038] Furthermore, the present invention provides a workpiece machining auxiliary clamping fixture, such as... Figure 1 As shown, to ensure that the clamping block 5 and the body 2 can rotate and slide accordingly during the movement of the tensioning member 3, two first springs 6 are provided in the second slide groove 203, with the two first springs 6 positioned on both sides of the second slide groove 203. By providing two first springs 6, the movement of the tensioning member 3 relative to the body 2 can be made more stable, thereby making the clamping of the workpiece more stable.

[0039] Furthermore, in this workpiece processing auxiliary clamping fixture, to further ensure that the clamping block 5 and the body 2 can rotate and slide accordingly during the movement of the tensioning member 3, the elastic coefficient of the second spring 7 is greater than that of the first spring 6. That is, when the pull rod 301 is pulled, the sliding of the slider 302 will cause the first spring 6 to be compressed first. The second spring 7 will only be compressed after the displacement of the slider 302 relative to the body 2 is restricted. Therefore, it can be ensured that when the pull rod 301 is pulled, the clamping part 501 can first extend out of the body 2 and then the positioned and clamped workpiece can be firmly fixed.

[0040] Furthermore, the present invention provides a workpiece machining auxiliary clamping fixture, such as... Figure 1 As shown, in order to improve the applicability of the clamping fixture, the body 2 is cylindrical, the base 1 is cylindrical, and the guide part 4 is conical. Since setting the positioning hole as a circular hole is a common design, the base 1, body 2, and guide part 4 of this clamping fixture are all designed as circular structures, which is beneficial to the versatility of the fixture.

[0041] This article uses specific embodiments to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other occasions without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A workpiece machining auxiliary clamping fixture, comprising a base, a body, and a guide portion, wherein the body is movably sleeved within the base, and the guide portion is movably connected to the upper part of the body, characterized in that: The body is provided with a limiting cavity, a first sliding groove, a second sliding groove and a mounting hole, and a tension member and a locking block are movably connected in the limiting cavity; The locking block includes a locking part, a mounting post, and a locking protrusion. The locking part and the locking protrusion are L-shaped. The mounting post is rotatably connected to the mounting hole so that the locking block can rotate along the mounting post. The tensioning member includes a pull rod and a slider. The slider is provided with a slot. One end of the slider is slidably connected to the first slot and the other end is slidably connected to the second slot. The protrusion abuts against the slot in the limiting cavity. The pull rod passes through the bottom of the body and extends outward from the base. A first spring is provided in the second slide groove. One end of the first spring abuts against the connection between the pull rod and the slider of the tension member, and the other end abuts against the bottom of the second slide groove. A second spring is provided between the bottom of the main body and the base, with one end of the second spring abutting inside the base and the other end abutting the bottom of the main body; When the tensioning component is pulled to bring the slider closer to the base, the first spring is compressed and the slot pushes the convex to rotate the block, causing the pressing part to extend from the body to the outside of the body. After the first spring is compressed, the second spring is compressed again and the body moves closer to the base. The card block is provided with a limiting protrusion. When the tensioning member is pulled to make the slider approach the base, the first spring is compressed and the card slot pushes the card protrusion to drive the card block to rotate, so that the pressing part extends from the body to the outside of the body. The limiting protrusion abuts against the side of the slider to restrict the slider from approaching the bottom of the second slide groove. The body is provided with two locking blocks, and the slider is provided with locking slots on the left and right sides, with the two locking blocks located on both sides of the slider. Two first springs are provided in the second slide groove, and the two first springs are provided on both sides of the second slide groove; The spring constant of the second spring is greater than that of the first spring; The main body is cylindrical, the base is cylindrical, and the guide portion is conical.

2. The workpiece machining auxiliary clamping fixture according to claim 1, characterized in that, The guide portion is detachably connected to the body by screws, and the upper part of the guide portion is smaller than the lower part, forming a cone shape.

3. The workpiece machining auxiliary clamping fixture according to claim 2, characterized in that, The bottom of the guide portion is fitted onto the upper part of the main body.

4. The workpiece machining auxiliary clamping fixture according to claim 1, characterized in that, The main body consists of two half-cylinders joined together.

5. The workpiece machining auxiliary clamping fixture according to claim 4, characterized in that, The semi-cylinder is provided with an upper protrusion, a lower protrusion, an upper groove, and a lower groove. When two semi-cylinders are spliced ​​together, the upper protrusion engages with the upper groove, and the lower protrusion engages with the lower groove.

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