Jig

Abstract

The utility model provides a jig which comprises a base used for bearing a workpiece. The cover plate assembly comprises a cover plate, a pressure head and an elastic piece, and the pressure head is connected to the cover plate through the elastic piece; the cover plate is detachably connected with the base, so that the elastic piece provides elastic force to the pressing head, then the part is pressed into the workpiece, the fixing efficiency and yield of the part on the workpiece are improved, and the fixing precision of the part on the workpiece can be guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of positioning devices, and specifically relates to a fixture. Background Art

[0002] During the assembly process of workpieces, there is a process of positioning the parts and then fixing them together.

[0003] Taking the production and assembly of workpieces such as the middle frame of a mobile phone as an example, steel sheets need to be welded to the middle frame. Generally, one steel sheet is positioned and welded before another one is positioned and welded. This not only reduces the efficiency of positioning and welding, but also affects the poor fixing accuracy of the steel sheets. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a fixture.

[0005] According to a first aspect of the utility model, a jig is provided for fixing parts on a workpiece, comprising:

[0006] A base, the base being used to carry a workpiece;

[0007] A cover plate assembly, the cover plate assembly comprising a cover plate, a pressure head and an elastic member, the pressure head being connected to the cover plate via the elastic member;

[0008] The cover plate is detachably connected to the base, so that the elastic member provides elastic force to the pressing head to press the component into the workpiece.

[0009] Optionally, a through hole is provided on the cover plate, and a fixing block is provided on a side of the cover plate away from the base, one end of the pressing head is connected to the fixing block through the elastic member, and the pressing head is passed through the through hole so that the other end of the pressing head can abut against the component.

[0010] Optionally, the edge of the through hole has a limiting groove, and the peripheral side of the pressing head has a stop block, and in the direction in which the pressing head approaches the base, the stop block stops in the limiting groove.

[0011] Optionally, the through hole is a tapered hole, the pressure head is in a tapered shape matching the tapered hole, and the area of ​​one end of the pressure head is larger than the area of ​​the other end of the pressure head.

[0012] Optionally, a first groove is provided on the fixing block, a second groove is provided on the pressure head, one end of the elastic member abuts against the first groove, and the other end of the elastic member abuts against the second groove.

[0013] Optionally, the pressure head has a plurality of protrusions disposed at intervals at one end close to the base, and the plurality of protrusions are used to abut against the component.

[0014] Optionally, a window area is formed between adjacent protrusions, and the window area is used to form a welding channel for the component.

[0015] Optionally, the base includes a bottom plate and a pressure claw, the pressure claw is rotatably connected to the bottom plate, and when a set snap-fit ​​gap is formed between the cover plate and the bottom plate, the pressure claw stops at a side of the cover plate away from the bottom plate.

[0016] Optionally, the base further includes a support plate, which is disposed on the bottom plate, and the support plate matches the shape of the workpiece and is used to support the workpiece.

[0017] Optionally, a positioning column is provided on the bottom plate, and the positioning column is used to cooperate with a positioning hole on the cover plate.

[0018] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0020] Figure 1 An exploded view of a fixture provided in one embodiment of the utility model;

[0021] Figure 2 A schematic diagram of a workpiece used by a jig provided in one embodiment of the utility model;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 An overall diagram of a jig provided for one embodiment of the utility model;

[0024] Figure 5 A side view of a fixture provided by one embodiment of the utility model;

[0025] Figure 6 A schematic diagram of a pressure head abutting a component of a jig provided by an embodiment of the utility model;

[0026] Figure 7 A partial schematic diagram of a cover plate of a fixture provided by one embodiment of the utility model;

[0027] Figure 8 A front perspective view of a pressure head of a jig provided in one embodiment of the utility model;

[0028] Fig. 9 A three-dimensional back view of a pressure head of a jig provided in one embodiment of the utility model;

[0029] Fig.10 A bottom view of a pressure head of a jig provided in one embodiment of the utility model.

[0030] Wherein: 1. base; 11. bottom plate; 111. positioning column; 12. pressing claw; 13. support plate; 2. cover plate assembly; 21. cover plate; 211. through hole; 212. fixing block; 213. limiting groove; 214. first groove; 22. pressing head; 221. stop block; 222. protrusion; 223. window area; 224. second groove; 23. elastic member;

[0031] 100. Workpiece; 101. Parts. DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0033] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0034] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] The embodiment of the present application provides a fixture for fixing a component 101 on a workpiece 100 .

[0039] In some embodiments, reference Figure 1 , the fixture includes:

[0040] A base 1, the base 1 is used to carry a workpiece 100;

[0041] The cover plate assembly 2 includes a cover plate 21, a pressing head 22 and an elastic member 23, wherein the pressing head 22 is connected to the cover plate 21 via the elastic member 23;

[0042] The cover plate 21 is detachably connected to the base 1 , so that the elastic member 23 provides elastic force to the pressing head 22 , thereby pressing the component 101 into the workpiece 100 .

[0043] In this embodiment, the workpiece 100 may be a middle frame or a bracket, and the component 101 may be a steel sheet or a spring sheet that needs to be installed on the middle frame or the bracket. The fixation of the component 101 on the workpiece 100 can facilitate the realization of multiple functions on the workpiece 100.

[0044] When fixing the component 101 on the workpiece 100, the workpiece 100 can be placed and supported by the base 1 to ensure the stability of the setting of the workpiece 100; the pressing head 22 is connected to the cover plate 21 through the elastic member 23. When the elastic member 23 is elastically deformed, the pressing head 22 can move relative to the cover plate 21. When the pressing head 22 moves toward the component 101, it can abut against the component 101, thereby achieving the fixation of the component 101 in the workpiece 100.

[0045] When the elastic member 23 maintains elastic deformation, the elastic force generated by the elastic member 23 can continuously output pressure to the pressing head 22 , so that the pressing head 22 can continuously press the component 101 , thereby facilitating continuous fixing of the component 101 on the workpiece 100 .

[0046] In one embodiment, when multiple parts 101 need to be fixed on the workpiece 100, the base 1 is first used to carry the workpiece 100; the cover assembly 2 includes multiple pressing heads 22 and multiple elastic members 23, and each pressing head 22 is connected to the cover 21 through an elastic member 23. The multiple elastic members 23 can provide a pressing force to the multiple pressing heads 22 when deformed, so that the multiple pressing heads 22 are in one-to-one contact with the multiple parts 101, and the multiple parts 101 can be pressed into the workpiece 100 at the same time, and the elastic members 23 are in a compressed state at this time.

[0047] The one-time pressing of multiple components 101 on the workpiece 100 can ensure that each component 101 is pressed at the same time without being affected by the flatness and height of the cover plate 21, making it easy to perform simultaneous spot welding or bonding and other fixing operations on each component 101, thereby improving the efficiency and yield of fixing the components 101 on the workpiece 100 and ensuring the accuracy of fixing the components 101 on the workpiece 100.

[0048] In one embodiment, the cover plate assembly 2 includes a plurality of pressing heads 22 and an elastic member 23, wherein the plurality of pressing heads 22 are connected to the cover plate 21 via the elastic member 23, for example, the elastic member 23 is an elastic plate, and the plurality of pressing heads 22 are connected to the cover plate 21 via different positions on the elastic plate, and the deformation of different positions on the elastic plate can provide a pressing force to the plurality of pressing heads 22, so that the plurality of pressing heads 22 are in one-to-one contact with the plurality of parts 101, and the plurality of parts 101 are simultaneously pressed into the workpiece 100. It should be noted that the elastic member 23 can also be a spring, such as a square spring or a circular spring, and as long as the elastic member 23 can provide a pressing force to the pressing head 22, there is no limitation on the specific elastic member 23.

[0049] In one embodiment, see Figure 2 and Figure 3The workpiece 100 may be a middle frame of a mobile phone, and the component 101 may be a steel sheet for grounding. The middle frame has a plurality of steel sheet grooves for fixing a plurality of steel sheets. The steel sheets are spot-welded on the middle frame of the mobile phone and then fixed in the corresponding steel sheet grooves. In the face of the situation where the heights of the plurality of steel sheet grooves are inconsistent due to the tolerance of the processing depths of the plurality of steel sheet grooves and the uneven flatness of the entire middle frame, a plurality of pressing heads 22 are connected to the cover plate 21 through elastic members 23, and each pressing head 22 abuts against a corresponding steel sheet, which not only solves the problem of inconsistent pressing degrees of the plurality of steel sheets due to the inconsistent heights of the plurality of steel sheet grooves, but also solves the problem of low efficiency caused by sequential pressing of a single steel sheet, thereby greatly improving the production efficiency of the middle frame.

[0050] In a specific embodiment, see Figure 1 Due to the design requirements of mobile phone antennas and radio frequency, it is necessary to weld steel sheets on the mobile phone middle frame to meet the requirements of connection and anti-oxidation. Figure 2 For example, six steel sheet grooves are set in the area near the edge of the middle frame, and the six steel sheets are welded in the six steel sheet grooves respectively by laser welding. During the welding process, the steel sheets are pressed on the middle frame by the pressing head 22 to prevent problems such as cold welding and welding failure caused by heat deformation and warping of the steel sheets during spot welding.

[0051] The fixture provided in the embodiment of the present application includes a base 1, which is used to support a workpiece 100; a cover plate assembly 2, which includes a cover plate 21, a pressing head 22 and an elastic member 23, and the pressing head 22 is connected to the cover plate 21 through the elastic member 23; the cover plate 21 is detachably connected to the base 1, so that the elastic member 23 provides elastic force to the pressing head 22, thereby pressing the component 101 into the workpiece 100, thereby improving the efficiency and yield of fixing the component 101 on the workpiece 100, and can ensure the accuracy of fixing the component 101 on the workpiece 100.

[0052] In one embodiment, see Figures 4 to 7 A through hole 211 is provided on the cover plate 21, and a fixing block 212 is provided on the side of the cover plate 21 away from the base 1. One end of the pressing head 22 is connected to the fixing block 212 through an elastic member 23. The pressing head 22 is passed through the through hole 211 so that the other end of the pressing head 22 can abut against the component 101.

[0053] In this embodiment, the fixing block 212 can be fixed to the side of the cover plate 21 away from the base 1 by screws. The part of the fixing block 212 extending toward the through hole 211 can be connected to or support the elastic member 23, and the elastic member 23 is compressed. When the elastic member 23 is restricted in a compressed state, the elastic member 23 can continuously output pressure. The pressure is applied to one end of the pressure head 22 and toward the component 101, so that the pressure head 22 can apply a force to the component 101 to sink into the workpiece 100 after passing through the through hole 211, thereby ensuring the stability of the component 101 fixed in the workpiece 100.

[0054] In one embodiment, see Figure 7 and Figure 8 The edge of the through hole 211 has a limiting groove 213 , and the peripheral side of the pressing head 22 has a stop block 221 . In the direction in which the pressing head 22 approaches the base 1 , the stop block 221 can be stopped in the limiting groove 213 .

[0055] In this embodiment, the stop block 221 can be a hanging ear formed on the side of the pressure head 22, and the limiting groove 213 on the edge of the through hole 211 on the cover plate 21 is limited and cooperated with the stop block 221; when the pressure head 22 is used to abut the component 101, the stop block 221 and the limiting groove 213 are not in contact, so as to ensure the effectiveness of the pressure applied by the pressure head 22 on the component 101; and when the pressure head 22 is not used to abut the component 101, the pressure head 22 drives the stop block 221 to stop in the limiting groove 213 under the elastic action of the elastic member 23, so as to form a limit for the pressure head 22. While preventing the pressure head from shaking, the limiting groove 213 can support the pressure head 22 to prevent the pressure head 22 from popping out of the cover plate 21 due to the elastic action of the elastic member 23.

[0056] In one embodiment, the through hole 211 is a tapered hole, the pressure head 22 is tapered to match the tapered hole, and the area of ​​one end of the pressure head 22 away from the through hole 211 is larger than the area of ​​the other end of the pressure head 22 .

[0057] In this embodiment, when the pressure head 22 is used to abut the component 101, the pressure head 22 does not contact the conical hole to ensure the effectiveness of the pressure applied by the pressure head 22 to the component 101; and when the pressure head 22 is not used to abut the component 101, the pressure head 22 is driven by the elastic action of the elastic member 23 to stop in the conical hole to form a limit for the pressure head 22. While preventing the pressure head from shaking, the conical hole can support the pressure head 22 to prevent the pressure head 22 from popping out of the cover plate 21 due to the elastic action of the elastic member 23.

[0058] In one embodiment, see Figure 6 and Fig. 9 A first groove 214 is provided on the fixing block 212 , a second groove 224 is provided on the pressing head 22 , one end of the elastic member 23 abuts against the first groove 214 , and the other end of the elastic member 23 abuts against the second groove 224 .

[0059] In this embodiment, during the deformation of the elastic member 23 between the fixed block 212 and the pressure head 22, the first groove 214 can limit one end of the elastic member 23, and the second groove 224 can limit the other end of the elastic member 23. On the basis of preventing the elastic member 23 from escaping from between the fixed block 212 and the pressure head 22, the linear deformation of the elastic member 23 between the first groove 214 and the second groove 224 can be ensured, thereby preventing the elastic member 23 from being offset during deformation.

[0060] In one embodiment, see Figure 8 The end of the pressing head 22 close to the base 1 has a plurality of protrusions 222 arranged at intervals, and the plurality of protrusions 222 are used to abut against the component 101.

[0061] In this embodiment, the pressing head 22 is abutted against the component 101 through the protrusion 222, which can form a point-shaped abutment on the component 101, thereby increasing the clamping force of the pressing head 22 per unit area of ​​the component 101; and multiple protrusions 222 are arranged at intervals and abut against the component 101 together, which can ensure the stability of the pressing of the pressing head 22 on the component 101.

[0062] In one embodiment, see Figure 8 and Fig.10 , a window area 223 is formed between adjacent protrusions 222 , and the window area 223 is used to form a welding channel for the component 101 .

[0063] In this embodiment, the window area 223 is hollowed out between adjacent protrusions 222 on the pressing head 22 to form a channel for facilitating welding of the component 101. While the protrusion 222 abuts against the component 101, the window area 223 can be used for the laser to pass through. After passing through the pressing head 22, the laser acts on the surface of the component 101 to achieve welding and fixation of the component 101 on the workpiece 100.

[0064] In one embodiment, see Figure 4 and Figure 5 The base 1 includes a bottom plate 11 and a pressing claw 12 , the pressing claw 12 is rotatably connected to the bottom plate 11 , and when a set snap-fitting gap is formed between the cover plate 21 and the bottom plate 11 , the pressing claw 12 stops at a side of the cover plate 21 away from the bottom plate 11 .

[0065] In this embodiment, the base plate 11 is used to carry the workpiece 100 and can enable the entire fixture to be placed stably on the spot welding device; the pressure claw 12 is rotatably connected to the edge of the base plate 11, and when the pressure claw 12 is flipped outward from the base plate 11, a snap-fitting space for the cover plate 21 can be formed on the base plate 11, so that the cover plate 21 and the base plate 11 can snap relative to each other and form a set snap-fitting gap, so that the workpiece 100 can be set between the cover plate 21 and the base plate 11; when the pressure claw 12 is flipped inward from the base plate 11, the pressure claw 12 can press the cover plate 21 on the side of the cover plate 21 away from the base plate 11, so as to provide continuous pressure to the cover plate 21, thereby ensuring the stability of the workpiece 100 fixed between the cover plate 21 and the base plate 11.

[0066] In one embodiment, see Figure 1 and Figure 5 The base 1 further includes a support plate 13 , which is disposed on the bottom plate 11 . The support plate 13 matches the shape of the workpiece 100 and is used to support the workpiece 100 .

[0067] In this embodiment, the supporting surface of the base plate 11 can be a supporting plane, and a boss is provided on the supporting plane to extend into the recessed area at the bottom of the supporting plate 13 to fix the supporting plate 13 on the base plate 11; and the supporting surface of the supporting plate 13 matches the structure of the bottom of the workpiece 100, for example, the raised position of the supporting surface of the supporting plate 13 is embedded in the recessed position at the bottom of the workpiece 100, and the raised position at the bottom of the workpiece 100 extends into the recessed position of the supporting surface of the supporting plate 13, so as to position and support the workpiece 100 through the supporting plate 13, avoid the deviation of the workpiece 100 on the base 1, and ensure the stability of the workpiece 100 when fixing the component 101.

[0068] In one embodiment, see Figure 1 and Figure 4 A positioning column 111 is provided on the bottom plate 11 , and the positioning column 111 is used to cooperate with the positioning hole on the cover plate 21 .

[0069] In this embodiment, when fixing the component 101 on the workpiece 100, the workpiece 100 can be placed on the base 1 first, and the workpiece 101 can be positioned by the positioning columns 111 on the bottom plate 11 and the supporting surface of the support plate 13; multiple components 101 are placed in the multiple positioning grooves of the workpiece 100 in turn, and the cover plate 21 is relatively engaged with the bottom plate 11 after being guided by the positioning columns 111 on the bottom plate 11. After the cover plate 21 is close to the bottom plate 11 and engaged to a set height, that is, a set engagement gap is formed between the cover plate 21 and the bottom plate 11, the pressure claw 12 is elastically acted on by the pressure claw spring and bounces inward, so that the pressure claw 12 engages the cover plate 21 on the base 1, and the cover plate 21 can be kept in a fixed state.

[0070] When welding the component 101 on the workpiece 100, the entire jig together with the workpiece 100 is placed in the welding equipment for spot welding. After the spot welding is completed, the jig is taken out, the end of the pressure claw 12 is pressed and the pressure claw 12 is flipped outward to separate the pressure claw 12 from the cover plate 21. The cover plate 21 can then be removed from the base 1, making it easier for the workpiece 100 to be removed from the jig. At this time, the pressure claw spring is compressed.

[0071] When the cover plate is buckled with the bottom plate 11 in the direction approaching the bottom plate 11, the bottom of the ram 22 first contacts the component 101 on the workpiece 100. As the pressure of the ram 22 against the component 101 increases, the ram 22 tends to move upward, and the elastic member 23 between the ram 22 and the fixed block 212 will be compressed. After the cover plate 21 is buckled close to the bottom plate 11 to a set height, the pressure claw 12 buckles the cover plate 21. At this point, the elastic member 23 on the ram 22 continuously outputs pressure to the ram 22, so that the ram 22 can continuously press the component 101 to ensure the stability of the component 101 fixed on the workpiece 100.

[0072] In this embodiment, since the elastic member 23 is retractable, when different components 101 have inconsistent heights due to the influence of groove depth tolerance and flatness, the expansion and contraction amount of the elastic member 23 will change. It is only necessary to adjust the snap-fit ​​height of the cover plate 21, that is, adjust the compression height of the elastic member 23, so as to ensure that different pressing heads 22 can press the corresponding components 101.

[0073] In one embodiment, the cover plate 21 and the bottom plate 11 may be fastened together by screws or air pressure push plates, which can also ensure the stability of the fastening between the cover plate 21 and the bottom plate 11.

[0074] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A fixture for fixing parts on a workpiece, characterized in that: include: A base, the base being used to carry a workpiece; A cover plate assembly, the cover plate assembly comprising a cover plate, a pressure head and an elastic member, the pressure head being connected to the cover plate via the elastic member; The cover plate is detachably connected to the base, so that the elastic member provides elastic force to the pressing head to press the component into the workpiece.

2. The fixture according to claim 1, characterized in that: The cover plate is provided with a through hole, and a fixing block is provided on a side of the cover plate away from the base, one end of the pressing head is connected to the fixing block through the elastic member, the pressing head is passed through the through hole and the other end of the pressing head can abut against the component.

3. The fixture according to claim 2, characterized in that: The edge of the through hole is provided with a limiting groove, and the peripheral side of the pressing head is provided with a stop block. In the direction in which the pressing head approaches the base, the stop block stops in the limiting groove.

4. The fixture according to claim 2, characterized in that: The through hole is a tapered hole, the pressure head is in a tapered shape matching the tapered hole, and the area of ​​one end of the pressure head is larger than the area of ​​the other end of the pressure head.

5. The fixture according to any one of claims 2 to 4, characterized in that: The fixing block is provided with a first groove, the pressure head is provided with a second groove, one end of the elastic member abuts against the first groove, and the other end of the elastic member abuts against the second groove.

6. The fixture according to claim 1, characterized in that: The pressure head has a plurality of protrusions arranged at intervals at one end close to the base, and the plurality of protrusions are used to abut against the component.

7. The fixture according to claim 6, characterized in that: A window area is formed between adjacent protrusions, and the window area is used to form a welding channel for the component.

8. The fixture according to claim 1, characterized in that: The base comprises a bottom plate and a pressing claw, wherein the pressing claw is rotatably connected to the bottom plate, and when a set snap-fitting gap is formed between the cover plate and the bottom plate, the pressing claw stops at a side of the cover plate away from the bottom plate.

9. The fixture according to claim 8, characterized in that: The base also includes a support plate, which is arranged on the bottom plate. The support plate matches the shape of the workpiece and is used to support the workpiece.

10. The fixture according to claim 8, characterized in that: The bottom plate is provided with a positioning column, and the positioning column is used to cooperate with the positioning hole on the cover plate.

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